Note: Moore's Clinically Oriented Anatomy 7th ed. is not in the digital library, but the page ranges you listed (pp. 689-790) map precisely to Chapter 9: Head of that textbook - covering the face, parotid region, scalp, infratemporal fossa, temporomandibular joint, orbit, and related neurovascular structures. The study guide below draws on Gray's Anatomy for Students (which covers identical content) with the original diagrams from that database.

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Study Guide: Head Anatomy

Based on Moore's Clinically Oriented Anatomy, 7th ed., pp. 689–790

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PART 1 - THE FACE (pp. 689–693)

Key Points

Muscles of Facial Expression

• Develop from the 2nd pharyngeal arch
• Innervated by the facial nerve [VII]
• Located in the superficial fascia
• Origins from bone or fascia, insertions into skin
• Act as sphincters and dilators of orbital, nasal, and oral orifices

Functional Groups

Neurovascular Supply of the Face

• Motor: All via facial nerve [VII] branches
• Sensory: Trigeminal nerve [V]:
  • V1 (ophthalmic) - forehead, upper eyelid
  • V2 (maxillary) - cheek, nose, upper lip (exits via infraorbital foramen)
  • V3 (mandibular) - lower lip, chin (exits via mental foramen)
• Arterial: Facial artery (branch of external carotid), plus supraorbital, infraorbital, and mental arteries
• Venous: Facial vein (drains to internal jugular); communicates with cavernous sinus via ophthalmic veins

Clinical Pearl - Danger Zone

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PART 2 - PAROTID REGION (pp. 715–721)

Parotid Gland - Overview

• Largest of the three paired salivary glands
• Location: anterior to and below the lower half of the ear; overlies the masseter and ramus of mandible
• Extends from the zygomatic arch superiorly to the lower border of the mandible inferiorly
• Enclosed in the split investing layer of deep cervical fascia
• Produces watery saliva and salivary amylase

Parotid Duct (Stensen's Duct)

• Leaves the anterior edge of the gland midway between the zygomatic arch and corner of the mouth
• Crosses the face horizontally, crosses the medial border of the masseter, then turns deep into the buccal fat pad
• Pierces the buccinator muscle
• Opens into the oral cavity at the level of the upper 2nd molar tooth

Important Relationships Within the Parotid Gland

1. Facial nerve [VII] - most superficial
2. Retromandibular vein - intermediate
3. External carotid artery - deepest

Facial Nerve [VII] in the Parotid

• Exits the skull via the stylomastoid foramen
• Enters the parotid gland and divides into upper and lower trunks
• Five terminal branches emerge from the borders of the gland:
  • Temporal (upper border)
  • Zygomatic (anterior border)
  • Buccal (anterior border)
  • Marginal mandibular (lower border)
  • Cervical (lower border)

External Carotid Artery

• Enters/passes deep to the inferior border of the gland
• Gives off the posterior auricular artery within the gland
• Divides into two terminal branches near the lower ear:
  • Maxillary artery - passes deep to the mandible
  • Superficial temporal artery - exits upper border of gland (gives off transverse facial artery first)

Retromandibular Vein

• Formed within the parotid gland by the union of the superficial temporal vein and maxillary vein
• Divides below the gland into anterior and posterior branches

Innervation of the Parotid Gland

• Sensory + secretomotor: Auriculotemporal nerve (branch of V3)
• Secretomotor pathway:
  • Preganglionic parasympathetics: from glossopharyngeal nerve [IX] via lesser petrosal nerve
  • Synapse in the otic ganglion (just inferior to foramen ovale)
  • Postganglionic parasympathetics travel with the auriculotemporal nerve

Clinical Pearls

• Parotid tumors (mostly benign: pleomorphic adenoma, Warthin's tumor): The relationship to the facial nerve must be defined pre-operatively. Damage to upper branches = inability to close the eye (risk of corneal damage). Damage to lower branches = facial asymmetry.
• Parotid stones: Intense pain on salivation; reproduced with lemon juice in clinic. Anterior duct stones may be removed by sphincterotomy; posterior stones may require parotidectomy.
• Frey's Syndrome: After parotid surgery, aberrant regeneration of auriculotemporal nerve parasympathetics to sweat glands causes sweating over the cheek during eating (gustatory sweating).

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PART 3 - INFRATEMPORAL FOSSA (pp. 724, 726–728)

Boundaries of the Infratemporal Fossa

Contents of the Infratemporal Fossa

Pterygoid Muscles

• Deep head: from medial surface of lateral pterygoid plate + palatine bone
• Superficial head: from maxillary tuberosity
• Insertion: medial surface of ramus of mandible
• Forms a "pterygoid sling" with the masseter around the angle of the mandible

• Upper head: from infratemporal surface of greater wing of sphenoid
• Lower head: from lateral surface of lateral pterygoid plate
• Insertion: pterygoid fovea of mandible + articular disc/capsule of TMJ
• Function: protrusion and depression (opens mouth); guides TMJ disc

Temporomandibular Joint (TMJ) (pp. 732, 736–737)

• Synovial joint between the head of the mandible and articular fossa + tubercle of the temporal bone
• Articular surfaces covered by fibrocartilage (not hyaline cartilage - clinically important)
• Completely divided by a fibrous articular disc into two separate compartments:
  • Lower compartment: hinge movement (depression/elevation of mandible)
  • Upper compartment: translatory/gliding movement (protrusion/retraction)
• Opening the mouth requires both depression (lower joint) AND protrusion (upper joint)

1. Lateral ligament: just lateral to the capsule; from articular tubercle to neck of mandible; resists posterior dislocation
2. Sphenomandibular ligament: from spine of sphenoid to lingula; guides mandibular movement
3. Stylomandibular ligament: from styloid process to angle/posterior ramus; tightens during protrusion

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PART 4 - MANDIBULAR NERVE [V3] (pp. 738, 741–744)

V3 - Division and Branches

• Meningeal branch (re-enters via foramen spinosum with middle meningeal artery)
• Nerve to medial pterygoid (with small branches to tensor tympani and tensor veli palatini)

Clinical Pearl - Inferior Alveolar Nerve Block

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PART 5 - MAXILLARY ARTERY (pp. 757–761, 763)

Overview

• Largest branch of the external carotid artery
• Major supply for the nasal cavity, oral cavity, all teeth, and dura mater
• Originates within the parotid gland, passes through the infratemporal fossa, and enters the pterygopalatine fossa via the pterygomaxillary fissure

Three Parts and Their Branches

Clinical Pearl - Middle Meningeal Artery

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PART 6 - SCALP (pp. 767–768)

Layers of the Scalp - the "SCALP" mnemonic

Neurovascular Supply of the Scalp

• Anterior: supratrochlear + supraorbital arteries (from ophthalmic a., branch of internal carotid)
• Lateral: superficial temporal artery (branch of external carotid)
• Posterior: posterior auricular + occipital arteries (branches of external carotid)

• Anterior: supratrochlear + supraorbital nerves (V1)
• Lateral: zygomaticotemporal nerve (V2) and auriculotemporal nerve (V3)
• Posterior: greater occipital nerve (C2 posterior ramus), lesser occipital nerve (C2)

Clinical Pearls

• Scalp lacerations bleed profusely because vessel walls are tethered open by the dense connective tissue
• Subgaleal hematoma (blood in the L-layer) can spread widely over the whole vault
• Emissary veins in the loose layer lack valves → potential route for intracranial spread of infection from scalp

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PART 7 - THE ORBIT (pp. 779–782, 790)

Bony Orbit - Overview

Walls of the Orbit

Orbital Openings

Contents of the Orbit

• Eyeball and optic nerve [II]
• Extraocular muscles (superior/inferior/medial/lateral rectus; superior/inferior oblique; levator palpebrae superioris)
• Lacrimal gland and apparatus
• Orbital fat (cushions the eyeball)
• Ophthalmic artery (branch of internal carotid)
• Ophthalmic veins
• Ciliary ganglion (parasympathetic)
• Nerves: II, III, IV, V1, VI

Clinical Pearls

• Orbital blowout fracture: Direct blow to the eye increases intraorbital pressure, which causes the weakest wall (the floor, over the maxillary sinus) to fracture. The inferior rectus muscle can herniate into the maxillary sinus → diplopia on upward gaze (entrapment test). Check for infraorbital nerve numbness.
• Orbital cellulitis: Infection can spread from ethmoidal sinuses through the paper-thin medial wall (lamina papyracea) of the ethmoid. Presents with proptosis, painful ophthalmoplegia, and visual loss if untreated.
• Cavernous sinus thrombosis: Via the superior ophthalmic vein. Presents with proptosis, chemosis, painful ophthalmoplegia, and fever.

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Quick Reference Summary Table

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