ls -la /home/daytona/workspace/ 2>/dev/null | head -20

mkdir -p /home/daytona/workspace/reflex-classification-ppt

~/reflex-classification-ppt/build.js

const pptxgen = require("pptxgenjs");

const pres = new pptxgen();
pres.layout = "LAYOUT_16x9";
pres.title = "Classification of Reflexes";
pres.author = "Neurophysiology Lecture";

// ─── Color Palette ───────────────────────────────────────────────────────────
const C = {
  navy:    "0D1B40",   // dominant dark bg
  teal:    "0F7173",   // accent
  gold:    "E8A838",   // highlight
  white:   "F4F6FA",
  light:   "D6E4F0",
  mid:     "1D3461",
  text:    "E8ECF2",
  dark:    "091029",
};

// ─── Helper: Section Banner ──────────────────────────────────────────────────
function addBanner(slide, text) {
  slide.addShape(pres.ShapeType.rect, { x: 0, y: 4.9, w: 10, h: 0.72, fill: { color: C.teal } });
  slide.addText(text, {
    x: 0.2, y: 4.92, w: 9.6, h: 0.65,
    fontSize: 13, color: C.white, bold: true, valign: "middle", margin: 0,
  });
}

// ─── Helper: Content Box ─────────────────────────────────────────────────────
function contentBox(slide, x, y, w, h, title, bullets, titleColor) {
  slide.addShape(pres.ShapeType.roundRect, {
    x, y, w, h,
    fill: { color: C.mid },
    line: { color: C.teal, width: 1.5 },
    rectRadius: 0.08,
  });
  slide.addText(title, {
    x: x + 0.12, y: y + 0.05, w: w - 0.24, h: 0.38,
    fontSize: 13, bold: true, color: titleColor || C.gold, margin: 0,
  });
  const items = bullets.map((b, i) => ({
    text: b,
    options: { bullet: { type: "bullet" }, fontSize: 11, color: C.text, breakLine: i < bullets.length - 1 },
  }));
  slide.addText(items, { x: x + 0.15, y: y + 0.42, w: w - 0.3, h: h - 0.5 });
}

// ─── SLIDE 1 — Title ─────────────────────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  // Accent bar left
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 0.25, h: 5.625, fill: { color: C.teal } });
  // Gold accent top strip
  s.addShape(pres.ShapeType.rect, { x: 0.25, y: 0, w: 9.75, h: 0.08, fill: { color: C.gold } });

  s.addText("CLASSIFICATION OF REFLEXES", {
    x: 0.5, y: 1.2, w: 9, h: 1,
    fontSize: 38, bold: true, color: C.white,
    charSpacing: 2, align: "center", valign: "middle",
  });
  s.addText("Neurophysiology & Spinal Cord Motor Control", {
    x: 0.5, y: 2.3, w: 9, h: 0.5,
    fontSize: 18, color: C.light, align: "center", italic: true,
  });
  s.addShape(pres.ShapeType.rect, { x: 3.5, y: 2.95, w: 3, h: 0.04, fill: { color: C.gold } });
  s.addText([
    { text: "Topics: ", options: { bold: true, color: C.gold } },
    { text: "Reflex Arc · Types · Stretch · Golgi Tendon · Withdrawal · Clinical Significance", options: { color: C.light } },
  ], { x: 0.5, y: 3.15, w: 9, h: 0.5, fontSize: 13, align: "center" });

  s.addText("Source: Costanzo Physiology, 7th Ed. | Kandel Principles of Neural Science", {
    x: 0.5, y: 5.15, w: 9, h: 0.35,
    fontSize: 10, color: C.teal, align: "center", italic: true,
  });
}

// ─── SLIDE 2 — Learning Objectives ──────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("LEARNING OBJECTIVES", {
    x: 0.4, y: 0.1, w: 9, h: 0.7,
    fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  const objectives = [
    "Define a reflex and describe the five components of a reflex arc",
    "Classify reflexes by number of synapses: monosynaptic vs. polysynaptic",
    "Distinguish somatic reflexes from autonomic (visceral) reflexes",
    "Explain the stretch reflex (myotatic) and its clinical significance",
    "Describe the Golgi tendon reflex (inverse myotatic) mechanism",
    "Understand the flexor-withdrawal reflex and crossed-extension reflex",
    "Interpret deep tendon reflex grading and clinical relevance",
    "Recognize UMN vs. LMN lesion patterns affecting reflexes",
  ];

  objectives.forEach((obj, i) => {
    const col = i < 4 ? 0 : 1;
    const row = i % 4;
    const x = col === 0 ? 0.3 : 5.2;
    const y = 1.05 + row * 1.08;
    s.addShape(pres.ShapeType.roundRect, {
      x, y, w: 4.6, h: 0.9,
      fill: { color: C.mid },
      line: { color: C.teal, width: 1 },
      rectRadius: 0.06,
    });
    s.addShape(pres.ShapeType.ellipse, {
      x: x + 0.08, y: y + 0.22, w: 0.45, h: 0.45,
      fill: { color: C.gold },
    });
    s.addText(`${i + 1}`, {
      x: x + 0.08, y: y + 0.22, w: 0.45, h: 0.45,
      fontSize: 13, bold: true, color: C.navy, align: "center", valign: "middle",
    });
    s.addText(obj, {
      x: x + 0.62, y: y + 0.1, w: 3.85, h: 0.72,
      fontSize: 10.5, color: C.text, valign: "middle",
    });
  });
}

// ─── SLIDE 3 — What is a Reflex? ─────────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("WHAT IS A REFLEX?", {
    x: 0.4, y: 0.1, w: 9, h: 0.7,
    fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  // Definition box
  s.addShape(pres.ShapeType.rect, { x: 0.3, y: 1.0, w: 9.4, h: 1.0, fill: { color: C.mid }, line: { color: C.gold, width: 2 } });
  s.addText([
    { text: "DEFINITION: ", options: { bold: true, color: C.gold } },
    { text: "A reflex is a stereotyped, involuntary motor response to a sensory stimulus. The response is predictable, rapid, and does not require conscious involvement of higher brain centers.", options: { color: C.text } },
  ], { x: 0.5, y: 1.05, w: 9, h: 0.9, fontSize: 13, valign: "middle" });

  // Key features
  const features = [
    ["Involuntary", "Does not require conscious thought — occurs automatically"],
    ["Stereotyped", "Same stimulus always produces the same response"],
    ["Rapid", "Response occurs before conscious awareness"],
    ["Protective", "Many reflexes protect from injury (e.g., withdrawal from pain)"],
  ];

  features.forEach(([title, desc], i) => {
    const x = (i % 2) * 4.8 + 0.3;
    const y = 2.15 + Math.floor(i / 2) * 1.55;
    s.addShape(pres.ShapeType.roundRect, { x, y, w: 4.5, h: 1.35, fill: { color: C.mid }, line: { color: C.teal, width: 1.5 }, rectRadius: 0.07 });
    s.addText(title, { x: x + 0.15, y: y + 0.08, w: 4.2, h: 0.35, fontSize: 13, bold: true, color: C.gold, margin: 0 });
    s.addText(desc, { x: x + 0.15, y: y + 0.45, w: 4.2, h: 0.8, fontSize: 11, color: C.text });
  });
}

// ─── SLIDE 4 — The Reflex Arc ─────────────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("THE REFLEX ARC — 5 COMPONENTS", {
    x: 0.4, y: 0.1, w: 9, h: 0.7,
    fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  const components = [
    { num: "1", name: "Receptor", desc: "Sensory organ that detects the stimulus (e.g., muscle spindle, skin mechanoreceptor, nociceptor). Converts stimulus to action potential." },
    { num: "2", name: "Afferent (Sensory) Nerve", desc: "Carries impulse from receptor toward the CNS (spinal cord). Group Ia, Ib, II, III or IV fibers depending on reflex type." },
    { num: "3", name: "Interneuron (Integration)", desc: "Located in spinal cord gray matter. May be absent (monosynaptic) or multiple (polysynaptic). Site of reflex integration." },
    { num: "4", name: "Efferent (Motor) Nerve", desc: "Carries impulse from CNS to effector organ. α-motoneurons for skeletal muscle; preganglionic autonomic for visceral reflexes." },
    { num: "5", name: "Effector Organ", desc: "Organ that executes the response — usually skeletal muscle (somatic) or smooth muscle/gland (autonomic)." },
  ];

  components.forEach((c, i) => {
    const y = 1.0 + i * 0.89;
    // Arrow connector
    if (i < 4) {
      s.addShape(pres.ShapeType.rect, { x: 1.65, y: y + 0.78, w: 0.06, h: 0.12, fill: { color: C.teal } });
    }
    s.addShape(pres.ShapeType.ellipse, { x: 0.3, y: y + 0.1, w: 0.58, h: 0.58, fill: { color: C.teal } });
    s.addText(c.num, { x: 0.3, y: y + 0.1, w: 0.58, h: 0.58, fontSize: 16, bold: true, color: C.white, align: "center", valign: "middle" });
    s.addShape(pres.ShapeType.roundRect, { x: 1.05, y, w: 8.65, h: 0.78, fill: { color: C.mid }, line: { color: C.teal, width: 1 }, rectRadius: 0.05 });
    s.addText(`${c.name}:  `, { x: 1.2, y: y + 0.08, w: 2, h: 0.62, fontSize: 12, bold: true, color: C.gold, valign: "middle" });
    s.addText(c.desc, { x: 3.1, y: y + 0.08, w: 6.4, h: 0.62, fontSize: 10.5, color: C.text, valign: "middle" });
  });
}

// ─── SLIDE 5 — Classification Overview ───────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("CLASSIFICATION OF REFLEXES — OVERVIEW", {
    x: 0.4, y: 0.1, w: 9, h: 0.7,
    fontSize: 21, bold: true, color: C.gold, valign: "middle",
  });

  // 3 classification categories
  const cats = [
    {
      title: "By Number of Synapses",
      color: C.teal,
      items: ["Monosynaptic — 1 synapse (e.g., stretch reflex)", "Disynaptic — 2 synapses (e.g., Golgi tendon reflex)", "Polysynaptic — many synapses (e.g., withdrawal reflex)"],
    },
    {
      title: "By Division of Nervous System",
      color: "7B2D8B",
      items: ["Somatic reflex — effector is skeletal muscle", "Autonomic (visceral) reflex — effector is smooth muscle, cardiac muscle, or gland", "Examples: pupillary light reflex, micturition reflex"],
    },
    {
      title: "By Location of Reflex Center",
      color: "C44B36",
      items: ["Spinal reflex — integrated in spinal cord (e.g., knee jerk)", "Cranial reflex — integrated in brain stem (e.g., corneal reflex, pupillary reflex)", "Supraspinal reflexes — involve higher centers"],
    },
  ];

  cats.forEach((cat, i) => {
    const x = 0.25 + i * 3.2;
    s.addShape(pres.ShapeType.rect, { x, y: 0.95, w: 3.05, h: 0.42, fill: { color: cat.color } });
    s.addText(cat.title, { x: x + 0.08, y: 0.97, w: 2.9, h: 0.38, fontSize: 11.5, bold: true, color: C.white, valign: "middle", margin: 0 });
    s.addShape(pres.ShapeType.roundRect, {
      x, y: 1.37, w: 3.05, h: 4.1,
      fill: { color: C.mid }, line: { color: cat.color, width: 1.5 }, rectRadius: 0.05,
    });
    cat.items.forEach((item, j) => {
      s.addShape(pres.ShapeType.rect, { x: x + 0.18, y: 1.55 + j * 1.26, w: 0.06, h: 0.06, fill: { color: cat.color } });
      s.addText(item, { x: x + 0.33, y: 1.46 + j * 1.26, w: 2.55, h: 1.1, fontSize: 11, color: C.text });
    });
  });
}

// ─── SLIDE 6 — Monosynaptic vs Polysynaptic ───────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("MONOSYNAPTIC vs. POLYSYNAPTIC REFLEXES", {
    x: 0.4, y: 0.1, w: 9, h: 0.7,
    fontSize: 20, bold: true, color: C.gold, valign: "middle",
  });

  // Monosynaptic
  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: C.teal, width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 0.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: C.teal } });
  s.addText("MONOSYNAPTIC", { x: 0.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 14, bold: true, color: C.white, align: "center", valign: "middle" });
  const monoPoints = [
    "Only ONE synapse in the reflex arc",
    "Ia afferent → α-motoneuron (direct)",
    "Fastest reflex type (no interneuron delay)",
    "Example: Stretch reflex / Knee-jerk reflex",
    "Receptor: Muscle spindle (nuclear bag & chain fibers)",
    "Afferent: Group Ia (largest, fastest conducting)",
    "Response: Contraction of homonymous muscle",
    "Clinical use: Tests integrity of spinal cord segments",
  ];
  s.addText(monoPoints.map((p, i) => ({ text: p, options: { bullet: true, fontSize: 11, color: C.text, breakLine: i < monoPoints.length - 1 } })),
    { x: 0.5, y: 1.6, w: 4.0, h: 3.6 });

  // Polysynaptic
  s.addShape(pres.ShapeType.roundRect, { x: 5.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: C.gold, width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 5.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: C.gold } });
  s.addText("POLYSYNAPTIC", { x: 5.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 14, bold: true, color: C.navy, align: "center", valign: "middle" });
  const polyPoints = [
    "MULTIPLE synapses via interneurons",
    "Longer conduction time than monosynaptic",
    "Can involve bilateral cord segments",
    "Example: Flexor-withdrawal reflex",
    "Receptor: Nociceptors, thermoreceptors",
    "Afferent: Group II, III, IV fibers",
    "Feature: Afterdischarge — prolonged response",
    "Feature: Crossed-extension reflex component",
  ];
  s.addText(polyPoints.map((p, i) => ({ text: p, options: { bullet: true, fontSize: 11, color: C.text, breakLine: i < polyPoints.length - 1 } })),
    { x: 5.5, y: 1.6, w: 4.0, h: 3.6 });
}

// ─── SLIDE 7 — Stretch Reflex ─────────────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("STRETCH REFLEX (Myotatic Reflex)", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  // Tag
  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 2.5, h: 0.38, fill: { color: C.teal }, rectRadius: 0.06 });
  s.addText("MONOSYNAPTIC — 1 Synapse", { x: 0.3, y: 1.0, w: 2.5, h: 0.38, fontSize: 11, bold: true, color: C.white, align: "center", valign: "middle" });

  const steps = [
    ["1. STIMULUS", "Muscle is stretched → extrafusal & intrafusal fibers lengthen"],
    ["2. RECEPTOR", "Muscle spindle (nuclear bag + nuclear chain fibers) activated"],
    ["3. AFFERENT", "Group Ia afferent fibers → action potentials → enter dorsal horn"],
    ["4. SYNAPSE", "Ia fibers synapse DIRECTLY on α-motoneurons (ventral horn)"],
    ["5. EFFERENT", "α-motoneurons activate → contract homonymous muscle"],
    ["6. RESULT", "Muscle shortens → decreases stretch → Ia firing returns to baseline"],
  ];

  steps.forEach(([label, text], i) => {
    const col = i < 3 ? 0 : 1;
    const row = i % 3;
    const x = col === 0 ? 0.3 : 5.2;
    const y = 1.5 + row * 1.3;
    s.addShape(pres.ShapeType.roundRect, { x, y, w: 4.6, h: 1.15, fill: { color: C.mid }, line: { color: C.teal, width: 1.2 }, rectRadius: 0.06 });
    s.addText(label, { x: x + 0.1, y: y + 0.06, w: 4.3, h: 0.32, fontSize: 10.5, bold: true, color: C.teal, margin: 0 });
    s.addText(text, { x: x + 0.1, y: y + 0.38, w: 4.3, h: 0.7, fontSize: 11, color: C.text, valign: "top" });
    // Arrow (except last in each column)
    if (row < 2) {
      s.addText("▼", { x: x + 2.0, y: y + 1.15, w: 0.5, h: 0.15, fontSize: 11, color: C.teal, align: "center" });
    }
  });

  // Key facts strip
  s.addShape(pres.ShapeType.rect, { x: 0, y: 5.25, w: 10, h: 0.38, fill: { color: C.teal } });
  s.addText("Key Fact: Simultaneous reciprocal inhibition — antagonist muscles are inhibited (via Ia inhibitory interneurons) so homonymous muscle contracts unopposed", {
    x: 0.2, y: 5.27, w: 9.6, h: 0.32, fontSize: 10, color: C.white, valign: "middle",
  });
}

// ─── SLIDE 8 — Muscle Spindle in Detail ──────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("MUSCLE SPINDLE — The Stretch Receptor", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  const rows = [
    ["Component", "Fiber Type", "Function", "Innervation"],
    ["Nuclear Bag Fiber", "Intrafusal", "Detects VELOCITY of length change", "Group Ia (primary)"],
    ["Nuclear Chain Fiber", "Intrafusal", "Detects STATIC muscle length", "Group Ia (primary) + Group II (secondary)"],
    ["Extrafusal Fiber", "Main muscle fiber", "Generates force / contraction", "α-motoneurons"],
    ["γ Dynamic motoneuron", "Efferent", "Adjusts spindle sensitivity during contraction", "Synapses on nuclear bag"],
    ["γ Static motoneuron", "Efferent", "Adjusts baseline spindle sensitivity", "Synapses on nuclear chain"],
  ];

  const colW = [2.4, 1.8, 3.5, 2.0];
  const colX = [0.2, 2.65, 4.5, 8.05];
  const rowColors = [C.teal, C.mid, C.mid, C.mid, C.mid, C.mid];
  const headerTextColor = C.white;

  rows.forEach((row, ri) => {
    row.forEach((cell, ci) => {
      const y = 1.0 + ri * 0.75;
      s.addShape(pres.ShapeType.rect, {
        x: colX[ci], y, w: colW[ci], h: 0.72,
        fill: { color: ri === 0 ? C.teal : (ri % 2 === 0 ? C.mid : C.dark) },
        line: { color: C.navy, width: 0.5 },
      });
      s.addText(cell, {
        x: colX[ci] + 0.06, y: y + 0.05, w: colW[ci] - 0.12, h: 0.62,
        fontSize: ri === 0 ? 11 : 10.5,
        bold: ri === 0,
        color: ri === 0 ? headerTextColor : C.text,
        valign: "middle",
      });
    });
  });

  // Gamma co-activation note
  s.addShape(pres.ShapeType.rect, { x: 0.2, y: 5.55, w: 9.6, h: 0, fill: { color: C.teal } });
  s.addText("γ-coactivation: α and γ motoneurons are activated simultaneously, keeping spindle sensitive even as muscle shortens during contraction.", {
    x: 0.2, y: 5.23, w: 9.6, h: 0.38, fontSize: 10.5, color: C.gold, italic: true,
  });
}

// ─── SLIDE 9 — Golgi Tendon Reflex ───────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("GOLGI TENDON REFLEX (Inverse Myotatic Reflex)", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 20, bold: true, color: C.gold, valign: "middle",
  });

  // Tag
  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 2.4, h: 0.38, fill: { color: "7B2D8B" }, rectRadius: 0.06 });
  s.addText("DISYNAPTIC — 2 Synapses", { x: 0.3, y: 1.0, w: 2.4, h: 0.38, fontSize: 11, bold: true, color: C.white, align: "center", valign: "middle" });

  // Left panel - steps
  const steps = [
    ["STIMULUS", "Muscle CONTRACTS (shortens) → tension rises in tendon"],
    ["RECEPTOR", "Golgi tendon organ (GTO) in series with extrafusal fibers"],
    ["AFFERENT", "Group Ib fibers activated → enter spinal cord dorsal horn"],
    ["INTERNEURON", "Ib fibers synapse on INHIBITORY interneuron (1st synapse)"],
    ["EFFERENT", "Inhibitory interneuron → inhibits α-motoneurons (2nd synapse)"],
    ["RESULT", "Muscle RELAXES — prevents excessive force injury (clasp-knife)"],
  ];

  steps.forEach(([label, text], i) => {
    const y = 1.52 + i * 0.67;
    s.addShape(pres.ShapeType.roundRect, { x: 0.3, y, w: 5.8, h: 0.6, fill: { color: C.mid }, line: { color: "7B2D8B", width: 1 }, rectRadius: 0.05 });
    s.addText(label + ": ", { x: 0.45, y: y + 0.07, w: 1.5, h: 0.46, fontSize: 11, bold: true, color: "B86FCE", margin: 0, valign: "middle" });
    s.addText(text, { x: 1.9, y: y + 0.07, w: 4.1, h: 0.46, fontSize: 10.5, color: C.text, valign: "middle" });
  });

  // Right panel - comparison
  s.addShape(pres.ShapeType.roundRect, { x: 6.3, y: 1.0, w: 3.4, h: 4.5, fill: { color: C.mid }, line: { color: C.gold, width: 1.5 }, rectRadius: 0.08 });
  s.addShape(pres.ShapeType.rect, { x: 6.3, y: 1.0, w: 3.4, h: 0.45, fill: { color: C.gold } });
  s.addText("vs. STRETCH REFLEX", { x: 6.35, y: 1.02, w: 3.3, h: 0.41, fontSize: 11.5, bold: true, color: C.navy, align: "center", valign: "middle" });

  const compRows = [
    ["Feature", "Stretch", "Golgi"],
    ["Stimulus", "Stretch", "Contraction"],
    ["Receptor", "Spindle", "GTO"],
    ["Afferent", "Ia", "Ib"],
    ["Arrangement", "Parallel", "Series"],
    ["Synapses", "1", "2"],
    ["Interneuron", "None", "Inhibitory"],
    ["Effect", "Contract", "Relax"],
  ];
  compRows.forEach((row, ri) => {
    const y = 1.5 + ri * 0.48;
    row.forEach((cell, ci) => {
      s.addText(cell, {
        x: 6.35 + ci * 1.1, y: y + 0.04, w: 1.05, h: 0.4,
        fontSize: ri === 0 ? 10 : 9.5,
        bold: ri === 0,
        color: ri === 0 ? C.navy : (ci === 0 ? C.gold : C.text),
        align: "center", valign: "middle",
        fill: ri === 0 ? { color: C.gold } : undefined,
      });
    });
  });
}

// ─── SLIDE 10 — Flexor Withdrawal Reflex ─────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("FLEXOR-WITHDRAWAL REFLEX", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 2.6, h: 0.38, fill: { color: "C44B36" }, rectRadius: 0.06 });
  s.addText("POLYSYNAPTIC — Many Synapses", { x: 0.3, y: 1.0, w: 2.6, h: 0.38, fontSize: 11, bold: true, color: C.white, align: "center", valign: "middle" });

  // Main features in 2 columns
  contentBox(s, 0.3, 1.5, 4.5, 3.9, "Mechanism", [
    "Stimulus: Nociceptive / thermal pain",
    "Afferent: Group II, III (Aδ), IV (C) fibers",
    "Multiple interneurons activated in spinal cord",
    "IPSILATERAL: Flexors contracted, extensors inhibited",
    "Result: Limb WITHDRAWS from painful stimulus",
    "Afterdischarge: Limb stays withdrawn briefly",
    "Critical function: PROTECTIVE reflex from injury",
  ], C.gold);

  contentBox(s, 5.0, 1.5, 4.7, 1.8, "Crossed-Extension Reflex", [
    "Occurs simultaneously with flexor withdrawal",
    "CONTRALATERAL limb: Extensors contract, flexors inhibited",
    "Purpose: Maintain balance while ipsilateral limb withdraws",
    "Example: Step on nail — left foot withdraws, right foot extends to bear weight",
  ], "FF8C42");

  contentBox(s, 5.0, 3.45, 4.7, 1.95, "Special Features", [
    "Irradiation: Spreads to multiple muscle groups",
    "Magnitude of response ∝ intensity of stimulus",
    "Afterdischarge: Neural circuits maintain response briefly",
    "Bilateral coordination via commissural interneurons",
  ], C.teal);
}

// ─── SLIDE 11 — Somatic vs Autonomic Reflexes ─────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("SOMATIC vs. AUTONOMIC REFLEXES", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  // Somatic
  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: C.teal, width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 0.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: C.teal } });
  s.addText("SOMATIC REFLEXES", { x: 0.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 14, bold: true, color: C.white, align: "center", valign: "middle" });

  const somaticItems = [
    "Effector: Skeletal muscle",
    "One efferent neuron (motoneuron to muscle)",
    "Always EXCITATORY at neuromuscular junction",
    "",
    "Examples:",
    "• Stretch reflex (knee jerk — L3, L4)",
    "• Biceps reflex (C5, C6)",
    "• Triceps reflex (C6, C7)",
    "• Ankle jerk (S1, S2)",
    "• Flexor-withdrawal reflex",
    "• Corneal blink reflex (CN V, VII)",
    "• Abdominal reflex (T8–T12)",
  ];
  s.addText(somaticItems.map((p, i) => ({ text: p, options: { bullet: !p.startsWith("•") && p !== "" && !p.startsWith("Examples"), fontSize: 10.5, color: p.startsWith("Examples") ? C.gold : C.text, bold: p.startsWith("Examples"), breakLine: i < somaticItems.length - 1 } })),
    { x: 0.5, y: 1.6, w: 4.0, h: 3.7 });

  // Autonomic
  s.addShape(pres.ShapeType.roundRect, { x: 5.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: "C44B36", width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 5.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: "C44B36" } });
  s.addText("AUTONOMIC REFLEXES", { x: 5.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 14, bold: true, color: C.white, align: "center", valign: "middle" });
  const autoItems = [
    "Effector: Smooth muscle, cardiac muscle, gland",
    "TWO efferent neurons: preganglionic + postganglionic",
    "Can be excitatory OR inhibitory",
    "",
    "Examples:",
    "• Pupillary light reflex (CN II → CN III)",
    "• Carotid sinus (baroreceptor) reflex",
    "• Micturition (urination) reflex",
    "• Defecation reflex",
    "• Cough & gag reflexes",
    "• Vomiting (emetic) reflex",
    "• Erection / ejaculation reflexes",
  ];
  s.addText(autoItems.map((p, i) => ({ text: p, options: { bullet: !p.startsWith("•") && p !== "" && !p.startsWith("Examples"), fontSize: 10.5, color: p.startsWith("Examples") ? C.gold : C.text, bold: p.startsWith("Examples"), breakLine: i < autoItems.length - 1 } })),
    { x: 5.5, y: 1.6, w: 4.0, h: 3.7 });
}

// ─── SLIDE 12 — Cranial Reflexes ──────────────────────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("CRANIAL (BRAINSTEM) REFLEXES", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  const cranialReflexes = [
    { name: "Pupillary Light Reflex", cn: "CN II → CN III", desc: "Light → retina → optic nerve → Edinger-Westphal nucleus → ciliary ganglion → pupil constricts (both sides — consensual reflex)", segment: "Midbrain" },
    { name: "Corneal Blink Reflex", cn: "CN V → CN VII", desc: "Touch cornea → trigeminal sensory → CN VII nucleus → orbicularis oculi contracts → blink response", segment: "Pons" },
    { name: "Gag Reflex", cn: "CN IX → CN X", desc: "Posterior pharynx stimulation → glossopharyngeal → vagus → pharyngeal muscles contract", segment: "Medulla" },
    { name: "Jaw-Jerk Reflex", cn: "CN V → CN V", desc: "MONOSYNAPTIC cranial reflex — tap chin → stretches masseter → contracts masseter. Brisk = upper motor neuron lesion above pons", segment: "Pons" },
    { name: "Vestibulo-Ocular Reflex", cn: "CN VIII → CN III/IV/VI", desc: "Head rotation → semicircular canals → eye moves opposite direction to maintain visual fixation", segment: "Pons/Medulla" },
  ];

  cranialReflexes.forEach((r, i) => {
    const y = 1.0 + i * 0.9;
    s.addShape(pres.ShapeType.roundRect, { x: 0.3, y, w: 9.4, h: 0.82, fill: { color: C.mid }, line: { color: C.teal, width: 0.8 }, rectRadius: 0.05 });
    s.addShape(pres.ShapeType.rect, { x: 0.3, y, w: 2.5, h: 0.82, fill: { color: C.dark } });
    s.addText(r.name, { x: 0.38, y: y + 0.06, w: 2.35, h: 0.4, fontSize: 11, bold: true, color: C.gold, margin: 0 });
    s.addText(r.cn, { x: 0.38, y: y + 0.44, w: 2.35, h: 0.3, fontSize: 10, color: C.teal, italic: true });
    s.addShape(pres.ShapeType.roundRect, { x: 2.88, y: y + 0.15, w: 1.1, h: 0.52, fill: { color: C.teal }, rectRadius: 0.04 });
    s.addText(r.segment, { x: 2.88, y: y + 0.15, w: 1.1, h: 0.52, fontSize: 9.5, bold: true, color: C.white, align: "center", valign: "middle" });
    s.addText(r.desc, { x: 4.1, y: y + 0.1, w: 5.5, h: 0.64, fontSize: 10, color: C.text, valign: "middle" });
  });
}

// ─── SLIDE 13 — Deep Tendon Reflex Grading ────────────────────────────────────
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  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("DEEP TENDON REFLEX GRADING (NIDSS Scale)", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 20, bold: true, color: C.gold, valign: "middle",
  });

  const grades = [
    { grade: "0", label: "Absent", desc: "No response even with reinforcement (Jendrassik)", color: "C44B36", clinical: "LMN lesion, peripheral neuropathy, myopathy" },
    { grade: "1+", label: "Diminished", desc: "Reduced response, requires reinforcement to elicit", color: "D4704A", clinical: "LMN pathology, hypothyroidism, early neuropathy" },
    { grade: "2+", label: "Normal", desc: "Normal response — present, not exaggerated", color: "2E8B57", clinical: "Normal finding" },
    { grade: "3+", label: "Brisk", desc: "More brisk than normal, spreading to adjacent muscles", color: "E8A838", clinical: "May be normal or early UMN lesion" },
    { grade: "4+", label: "Very Brisk", desc: "Markedly exaggerated, clonus may be present", color: C.teal, clinical: "UMN lesion (stroke, myelopathy, MS)" },
  ];

  // Table header
  ["Grade", "Label", "Description", "Clinical Significance"].forEach((h, ci) => {
    const colX2 = [0.2, 1.05, 2.3, 6.3];
    const colW2 = [0.8, 1.2, 3.9, 3.45];
    s.addShape(pres.ShapeType.rect, { x: colX2[ci], y: 1.0, w: colW2[ci], h: 0.42, fill: { color: C.teal } });
    s.addText(h, { x: colX2[ci] + 0.05, y: 1.02, w: colW2[ci] - 0.1, h: 0.38, fontSize: 11, bold: true, color: C.white, valign: "middle" });
  });

  grades.forEach((g, i) => {
    const y = 1.45 + i * 0.8;
    const colX2 = [0.2, 1.05, 2.3, 6.3];
    const colW2 = [0.8, 1.2, 3.9, 3.45];
    const bg = i % 2 === 0 ? C.mid : C.dark;
    colX2.forEach((cx, ci) => {
      s.addShape(pres.ShapeType.rect, { x: cx, y, w: colW2[ci], h: 0.75, fill: { color: bg }, line: { color: C.navy, width: 0.5 } });
    });
    s.addShape(pres.ShapeType.ellipse, { x: 0.25, y: y + 0.13, w: 0.5, h: 0.5, fill: { color: g.color } });
    s.addText(g.grade, { x: 0.25, y: y + 0.13, w: 0.5, h: 0.5, fontSize: 13, bold: true, color: C.white, align: "center", valign: "middle" });
    s.addText(g.label, { x: colX2[1] + 0.06, y: y + 0.15, w: colW2[1] - 0.12, h: 0.45, fontSize: 11, bold: true, color: g.color, valign: "middle" });
    s.addText(g.desc, { x: colX2[2] + 0.06, y: y + 0.08, w: colW2[2] - 0.12, h: 0.62, fontSize: 10.5, color: C.text, valign: "middle" });
    s.addText(g.clinical, { x: colX2[3] + 0.06, y: y + 0.08, w: colW2[3] - 0.12, h: 0.62, fontSize: 10.5, color: C.text, valign: "middle" });
  });

  addBanner(s, "Jendrassik Maneuver: Ask patient to hook fingers and pull — reinforces reflex via descending facilitation. Use when reflex appears absent.");
}

// ─── SLIDE 14 — UMN vs LMN Lesions and Reflexes ──────────────────────────────
{
  const s = pres.addSlide();
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.navy } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.9, fill: { color: C.mid } });
  s.addText("UMN vs. LMN LESIONS — Reflex Changes", {
    x: 0.4, y: 0.1, w: 9, h: 0.7, fontSize: 22, bold: true, color: C.gold, valign: "middle",
  });

  // UMN Panel
  s.addShape(pres.ShapeType.roundRect, { x: 0.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: C.teal, width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 0.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: C.teal } });
  s.addText("UPPER MOTOR NEURON (UMN)", { x: 0.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 12.5, bold: true, color: C.white, align: "center", valign: "middle" });
  const umnItems = [
    "Location: Cortex → spinal cord (corticospinal tract)",
    "DTRs: HYPERREFLEXIA (exaggerated)",
    "Babinski sign: POSITIVE (extensor plantar response)",
    "Clonus: Present",
    "Tone: SPASTIC (increased)",
    "Weakness: Usually distal > proximal",
    "Muscle atrophy: Minimal (disuse only)",
    "Fasciculations: ABSENT",
    "Examples: Stroke, MS, spinal cord compression",
  ];
  s.addText(umnItems.map((p, i) => ({ text: p, options: { bullet: true, fontSize: 10.5, color: C.text, breakLine: i < umnItems.length - 1 } })),
    { x: 0.5, y: 1.6, w: 4.0, h: 3.7 });

  // LMN Panel
  s.addShape(pres.ShapeType.roundRect, { x: 5.3, y: 1.0, w: 4.4, h: 4.4, fill: { color: C.mid }, line: { color: "C44B36", width: 2 }, rectRadius: 0.1 });
  s.addShape(pres.ShapeType.rect, { x: 5.3, y: 1.0, w: 4.4, h: 0.5, fill: { color: "C44B36" } });
  s.addText("LOWER MOTOR NEURON (LMN)", { x: 5.4, y: 1.02, w: 4.2, h: 0.46, fontSize: 12.5, bold: true, color: C.white, align: "center", valign: "middle" });
  const lmnItems = [
    "Location: Anterior horn cell → muscle (final path)",
    "DTRs: HYPOREFLEXIA or ABSENT",
    "Babinski sign: NEGATIVE (normal flexor)",
    "Clonus: Absent",
    "Tone: FLACCID (decreased/absent)",
    "Weakness: Segmental distribution",
    "Muscle atrophy: SIGNIFICANT (denervation)",
    "Fasciculations: PRESENT (pathognomonic)",
    "Examples: Polio, GBS, ALS (mixed), disc herniation",
  ];
  s.addText(lmnItems.map((p, i) => ({ text: p, options: { bullet: true, fontSize: 10.5, color: C.text, breakLine: i < lmnItems.length - 1 } })),
    { x: 5.5, y: 1.6, w: 4.0, h: 3.7 });
}

// ─── SLIDE 15 — Summary ───────────────────────────────────────────────────────
{
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  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 5.625, fill: { color: C.dark } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 0, w: 10, h: 0.08, fill: { color: C.gold } });
  s.addShape(pres.ShapeType.rect, { x: 0, y: 5.54, w: 10, h: 0.08, fill: { color: C.teal } });

  s.addText("SUMMARY — Classification of Reflexes", {
    x: 0.4, y: 0.15, w: 9.2, h: 0.72, fontSize: 22, bold: true, color: C.gold, valign: "middle", charSpacing: 1,
  });

  const summaryData = [
    {
      title: "Reflex Arc Components",
      color: C.teal,
      items: ["Receptor → Afferent nerve → Interneuron → Efferent nerve → Effector"],
    },
    {
      title: "Synaptic Complexity",
      color: C.gold,
      items: ["Monosynaptic: Stretch reflex (1 synapse)", "Disynaptic: Golgi tendon reflex (2 synapses)", "Polysynaptic: Flexor-withdrawal (many synapses)"],
    },
    {
      title: "Effector Type",
      color: "7B2D8B",
      items: ["Somatic: Skeletal muscle (single efferent neuron)", "Autonomic: Smooth/cardiac muscle & glands (2-neuron chain)"],
    },
    {
      title: "Reflex Center",
      color: "C44B36",
      items: ["Spinal reflexes: Integrated in spinal cord", "Cranial reflexes: Integrated in brainstem"],
    },
    {
      title: "Key Spinal Reflexes",
      color: "2E8B57",
      items: ["Stretch: Ia afferent → α-motoneuron (contract)", "Golgi tendon: Ib → inhibitory interneuron (relax)", "Withdrawal: Nociceptive → flex + crossed extension"],
    },
    {
      title: "Clinical Applications",
      color: "D4704A",
      items: ["DTR Grade 0-1+: LMN lesion (flaccid, atrophy, fasciculations)", "DTR Grade 3-4+: UMN lesion (spastic, Babinski+, clonus)"],
    },
  ];

  const positions = [
    [0.2, 0.98], [3.55, 0.98], [6.9, 0.98],
    [0.2, 3.1], [3.55, 3.1], [6.9, 3.1],
  ];

  summaryData.forEach((item, i) => {
    const [x, y] = positions[i];
    s.addShape(pres.ShapeType.roundRect, { x, y, w: 3.2, h: 1.98, fill: { color: C.mid }, line: { color: item.color, width: 1.5 }, rectRadius: 0.08 });
    s.addShape(pres.ShapeType.rect, { x, y, w: 3.2, h: 0.38, fill: { color: item.color } });
    s.addText(item.title, { x: x + 0.08, y: y + 0.04, w: 3.04, h: 0.3, fontSize: 11, bold: true, color: C.white, valign: "middle", margin: 0 });
    s.addText(item.items.map((p, j) => ({ text: p, options: { bullet: true, fontSize: 9.5, color: C.text, breakLine: j < item.items.length - 1 } })),
      { x: x + 0.12, y: y + 0.44, w: 2.96, h: 1.48 });
  });

  s.addText("Reference: Costanzo Physiology 7th Ed. | Kandel Principles of Neural Science 6th Ed. | Medical Physiology (Boron & Boulpaep)", {
    x: 0.2, y: 5.38, w: 9.6, h: 0.2, fontSize: 8.5, color: C.teal, align: "center", italic: true,
  });
}

// ─── Write file ───────────────────────────────────────────────────────────────
pres.writeFile({ fileName: "/home/daytona/workspace/reflex-classification-ppt/Reflex_Classification.pptx" })
  .then(() => console.log("SUCCESS: Reflex_Classification.pptx written"))
  .catch(e => { console.error("ERROR:", e); process.exit(1); });

cd /home/daytona/workspace/reflex-classification-ppt && node build.js 2>&1

ls -lh /home/daytona/workspace/reflex-classification-ppt/Reflex_Classification.p…