Catatonia in simple terms

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Here is a plain-language explanation of catatonia, drawn from multiple major psychiatric and neurology textbooks:

Catatonia - In Simple Terms

What is it?

Catatonia is a condition where a person's motor (movement) control goes haywire - they can become either completely frozen and unresponsive, or wildly agitated with purposeless movement. The brain loses its normal ability to regulate movement, speech, and behavior in a coordinated way.

Think of it like the brain's "movement control system" either locking up (like a frozen computer) or running out of control (like a computer spinning with a stuck process).

What does it look like?

There are two main forms:

Form	What you see
Frozen/Stuporous	Person becomes mute, rigid, stares blankly, barely moves
Excited/Agitated	Person is restless, combative, impulsive, doing purposeless movements

Common signs include:

Mutism - stops speaking entirely
Stupor - reduced or absent responsiveness
Waxy flexibility - limbs can be placed in positions and they stay there (like modeling clay)
Negativism - resists or does the opposite of what's asked
Stereotypies - repeating the same word, phrase, or movement over and over
Echolalia/Echopraxia - copying what someone else says or does
Unusual posturing - holding strange body positions for a long time
Rigidity - stiff muscles

Who gets it and why?

Catatonia is not a disease by itself - it is a syndrome that can be triggered by many different conditions:

Psychiatric illness (most common): Bipolar disorder, schizophrenia, severe depression, postpartum psychosis, autism spectrum disorder
Brain/nervous system problems: Stroke, encephalitis, brain tumors, epilepsy (non-convulsive seizures)
Medical conditions: Thyroid disease, lupus, Wilson's disease, diabetic crises, kidney failure
Drug-related: Antipsychotic medications, drug withdrawal (especially benzodiazepines, clozapine), recreational drugs

Around 9% of psychiatric inpatients have some degree of catatonia - historically it was thought to be rare, but it is actually fairly common and often missed. Up to 20% of cases are linked to mania, and 5-15% to schizophrenia.

Is it dangerous?

Yes - if left untreated, catatonia can become life-threatening. The risks include:

Severe dehydration (the person stops eating/drinking)
Blood clots (from not moving)
Pneumonia
Malignant catatonia - a dangerous escalation with high fever, unstable blood pressure, rapid heart rate, and in severe cases, coma and cardiac arrest

How is it treated?

The good news is that catatonia responds well to treatment:

Benzodiazepines (like lorazepam/diazepam) - the first-line treatment; 60-80% of patients improve. Doctors typically do a "lorazepam challenge test" - give a small dose and watch for rapid improvement.
ECT (Electroconvulsive Therapy) - highly effective especially for severe or treatment-resistant cases, or when the person has fever or delirium.
Treat the underlying cause - e.g., if it is due to lupus, treat the lupus.

Benzodiazepines work by boosting a brain chemical called GABA, which helps "calm down" the misfiring brain signals. A shorter duration of catatonia and the presence of waxy flexibility predict a better response.

The bottom line

Catatonia = the brain's motor and behavioral control system either locks up or spins out, most often in the setting of severe psychiatric illness, though many medical conditions can also trigger it. It is treatable and recoverable if caught in time, but dangerous if ignored.

Sources: Bradley and Daroff's Neurology in Clinical Practice; Maudsley Prescribing Guidelines in Psychiatry, 15th ed.; Kaplan & Sadock's Comprehensive Textbook of Psychiatry; Goldman-Cecil Medicine

Psychomotor activity

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Here is a clear, simple breakdown of psychomotor activity from the textbooks:

Psychomotor Activity - Explained Simply

What does it mean?

Psychomotor activity = the observable physical expression of your mental/emotional state. It is the link between what is happening in your mind and how your body moves and behaves.

The word breaks down as:

Psycho = the mind, mood, and mental processes
Motor = movement and physical actions

So when your brain is energized, your body moves faster. When your brain is slowed down, your body slows down too.

The Two Extremes

Psychomotor activity exists on a spectrum, with two key disturbances at opposite ends:

1. Psychomotor Retardation (Slowing Down)

The mind and body both slow down significantly. Signs include:

Moving very slowly or barely at all
Thinking and speaking slowly
Long pauses before answering questions
Slumped posture, downcast gaze
Overwhelming fatigue - everything feels like an effort
Poor concentration and forgetfulness
A subjective sense that time has stopped or is passing very slowly
Inability to make even simple decisions

A patient once described it as: "I am in a daze, confused, disoriented, staring. My thoughts do not flow, my mind is arrested... I have such an inertia, I cannot assert myself. I cannot fight; I have no will."

Some experts consider psychomotor retardation to be the core feature of depression - the brain's subcortical (extrapyramidal) system slows down the whole person, not just their mood.

2. Psychomotor Agitation (Speeding Up)

The mind and body both become over-activated. Signs include:

Fidgeting, restlessness, pacing
Hand-wringing, hair-pulling
Pressured (rapid, pressured) speech
Inability to sit still
Combativeness or impulsivity in extreme cases

Where does it show up?

Psychomotor disturbance is a key feature across many psychiatric and medical conditions:

Condition	Psychomotor Change
Depression	Retardation is more common; agitation also occurs
Mania / Bipolar disorder	Agitation predominates
Schizophrenia	Fixed posturing, odd behavior, negativism
Anxiety	Agitation, restlessness, tremors
Delirium	Can be hypoactive (slowed), hyperactive (agitated), or mixed
Catatonia	Extreme retardation (stupor) or extreme agitation
Stimulant drug use	Hyperactive, agitated state
Depression in older adults	Retardation more common than agitation

How is it assessed?

In a clinical mental status exam, clinicians observe motoric behavior - looking for:

Level of activity (more or less than normal?)
Tics, tremors, automatisms
Mannerisms, grimacing
Stereotypies (repetitive purposeless movements)
Waxy flexibility, negativism
Echopraxia (copying another's movements)

The Salpêtrière Retardation Scale is one formal tool used to measure psychomotor retardation objectively, focusing on spontaneous movement, posture, speech, and subjective time perception.

Brain basis (in simple terms)

Psychomotor activity is regulated by a cortico-striato-thalamo-cortical loop - a circuit connecting the prefrontal cortex to the striatum (basal ganglia) and thalamus and back. When this circuit runs too fast, you get agitation. When it runs too slow, you get retardation. Disruption in dopamine and GABA signaling within this circuit is thought to underlie these changes.

Summary

	Retardation	Agitation
Speed	Slowed	Sped up
Speech	Slow, quiet, monosyllabic	Rapid, pressured
Movement	Reduced, sluggish	Restless, fidgety
Common in	Depression, catatonia, hypoactive delirium	Mania, anxiety, stimulant use, hyperactive delirium

Sources: Kaplan & Sadock's Comprehensive Textbook of Psychiatry; Rosen's Emergency Medicine; Bradley and Daroff's Neurology in Clinical Practice; Kaplan & Sadock's Synopsis of Psychiatry

Tics

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Here is a clear, simple guide to tics from the textbooks:

Tics - Explained Simply

What is a tic?

A tic is a sudden, brief, repetitive, involuntary (or semi-voluntary) movement or sound that a person makes. They tend to look like exaggerated fragments of normal behavior - a blink, a shrug, a grunt - that happen at irregular intervals and keep repeating.

The key thing that makes tics unique: the person usually feels an inner urge or uncomfortable sensation building up just before the tic, and the tic temporarily relieves that tension - like needing to scratch an itch.

Two Main Types

Motor Tics - involve movement

Simple Motor Tics	Complex Motor Tics
Brief, isolated muscle twitches	Coordinated, patterned movements involving several muscles
Eye blinking, nose twitching, shoulder shrugging, head jerking	Facial gestures, touching objects, jumping, obscene gestures (copropraxia), copying others' movements (echopraxia)

Motor tics can be:

Clonic - quick, jerky
Tonic - slower, sustained muscle contractions
Dystonic - prolonged, twisting postures
Blocking tics - sudden, brief freezing of all movement including speech, without losing consciousness

Phonic (Vocal) Tics - involve sounds

Simple Phonic Tics	Complex Phonic Tics
Grunting, sniffing, throat clearing, barking, coughing	Saying words or phrases, repeating others' words (echolalia), shouting obscenities (coprolalia)

Note: Coprolalia (yelling obscenities) is the most famous feature of Tourette syndrome but is actually NOT the most common symptom - most people with tics never have it.

The "Premonitory Urge" - What makes tics unique

Unlike most other movement disorders, tics have a warning signal:

A building inner tension or uncomfortable local sensation (e.g., an urge in the eye before blinking, a pressure in the throat before grunting)
The tic temporarily relieves the tension
Many people can voluntarily suppress their tic for a short time - but this takes effort and the urge builds up until they eventually let it happen

This is what separates tics from truly involuntary movements like chorea or tremor.

What makes tics worse or better?

Makes tics WORSE	Makes tics BETTER
Stress and anxiety	Distraction / focused concentration
Relaxation at home (no need to suppress)	Sleep (most tics subside)
Fatigue	Voluntary suppression (short-term)
Watching TV (letting guard down)

Tics also naturally wax and wane over weeks to months - they can flare up badly, then calm down, then flare again. Complete remissions are possible.

Types of Tic Disorders (DSM-5)

Disorder	What it means
Provisional Tic Disorder	Motor and/or vocal tics lasting less than 1 year
Persistent (Chronic) Motor OR Vocal Tic Disorder	Either motor or vocal tics (not both) lasting more than 1 year
Tourette Disorder (Tourette Syndrome)	Both multiple motor tics AND at least one vocal tic, lasting more than 1 year

All tic disorders must begin before age 18 and cannot be caused by a drug or medical condition.

Tourette Syndrome - the most well-known

First described in 1885 by French neurologist Georges Gilles de la Tourette, who reported 8 patients with childhood-onset tics, behavioral problems (inattention, hyperactivity, obsessions). Key facts:

Most common cause of tics
Much more common in boys
Strongly hereditary - runs in families, high concordance in identical twins
Often comes with comorbid conditions: ADHD, OCD, impulsive behavior, anxiety
Tics typically emerge around age 6-8, peak in childhood/early teens, then often improve in adolescence

How are tics treated?

Treatment depends on how much the tics are interfering with life:

Behavioral therapy - first-line treatment
- Habit Reversal Training (HRT) - teaching a competing movement to replace the tic
- CBIT (Comprehensive Behavioral Intervention for Tics)
Medications (for more severe tics):
- Atypical antipsychotics (risperidone) - tried first
- Typical antipsychotics (haloperidol, pimozide) - if atypicals don't work
- Alpha-2 agonists (clonidine, guanfacine) - especially if ADHD is also present
Psychotherapy - helps with social difficulties caused by tics

Prognosis

Children with tics between ages 6-8 tend to have the best outcomes
Tics often last 4-6 years then remit in early adolescence
Facial tics tend to remit faster than limb or trunk tics
Many people with mild tics are not even aware they have them

What to distinguish tics from

Tics can look like other movement disorders. Key differences:

Chorea (Huntington's) - random, flowing, dance-like; no premonitory urge; not suppressible
Myoclonus - sudden shock-like jerks; no urge; not suppressible
Dystonia - sustained abnormal postures; no urge
Restless legs syndrome - urge to move legs, typically at night/rest
Akathisia - inner restlessness and need to move, caused by medications

Sources: Bradley and Daroff's Neurology in Clinical Practice; Kaplan & Sadock's Comprehensive Textbook of Psychiatry; Kaplan & Sadock's Synopsis of Psychiatry

What's the difference between tics and OCD?

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This is a great question because they genuinely overlap and can be hard to tell apart. Here is a full breakdown:

Tics vs. OCD - What's the Difference?

The Core Distinction

	Tics	OCD
Driven by	A physical/sensory urge - a local uncomfortable sensation in the body	A thought/fear - an obsessive idea that something bad will happen
Purpose	To relieve a bodily tension or "inner urge"	To prevent harm, reduce anxiety, or make things feel "right"
Involves thinking?	Minimal cognitive involvement - it's more bodily	Heavily cognitive - obsessions dominate the mind
Anxiety?	Low - mostly a sensory itch that needs scratching	High - the person is distressed by the obsession and fears acting on it
Feels like	"I need to move - like an itch I must scratch"	"If I don't do this, something terrible will happen"

OCD - What is it exactly?

Obsessions are intrusive, persistent, distressing thoughts that keep forcing themselves into consciousness - things like:

Fear of contamination ("My hands are dirty, I'll get sick")
Fear of harming others ("What if I hurt my child?")
Need for symmetry or precision ("Things must be perfectly aligned")
Checking impulses ("Did I leave the gas on?")

The person recognizes these thoughts as excessive or irrational but cannot dismiss them. This is key - the thoughts are ego-dystonic (the person knows they don't make sense but can't stop them).

Compulsions are the acts that follow - rituals performed to silence the obsession and relieve the anxiety. Examples: hand washing, checking locks, counting, arranging objects in exact order, tapping in sequences.

Tics - The contrast

Tics are driven by a premonitory sensory urge - an uncomfortable physical feeling (pressure, tingling, "something not right") in a specific body part, e.g., the eye, throat, or shoulder. The movement or sound temporarily relieves that tension.

There is no obsessive thought behind a simple tic. No fear, no catastrophizing - just a bodily urge that demands release.

Where it gets confusing - Complex Tics vs. Compulsions

The textbooks are clear that this distinction can be genuinely difficult:

"Complex tics may be difficult to distinguish from compulsive behaviors. The difference between some complex tics and compulsions is subtle."

Kaplan & Sadock's Comprehensive Textbook of Psychiatry

The key question to ask: "Why are you doing this?"

"To satisfy an urge / it just felt like I had to" → Tic
"To prevent something bad / reduce anxiety / make things feel right" → Compulsion

Research by Miguel et al. found:

People with OCD without tics report more anxious thoughts, more autonomic anxiety (racing heart, etc.), and fewer sensory phenomena when doing repetitive behaviors
People with Tourette's report more sensory/bodily phenomena (the "just right" feeling) and fewer obsessive thoughts behind their repetitive behaviors

The "Just Right" Phenomenon

Both tics and OCD can involve a feeling that something is "not right" until an action is completed. But:

In tics: it's primarily sensory/physical - a local body sensation
In OCD: it's cognitive - a mental state of incompleteness, contamination, or feared harm

They Frequently Co-Exist

This is where things get even more complex. Tics and OCD are closely linked:

Up to 50% of people with Tourette syndrome also have OCD
They share similar brain circuits - both involve dysfunction in cortico-striato-thalamo-cortical loops (the basal ganglia pathway)
Tourette's was originally described with both tics and compulsive utterances (coprolalia)
They run in the same families - chronic tic disorder and Tourette's aggregate together genetically

One classic textbook note:

"Certain motor disturbances - namely, habit spasms or tics - are in a sense motor compulsions... Unlike compulsions, however, tics are not usually based directly on obsessive thoughts - except perhaps in Gilles de la Tourette syndrome, in which multiple tics are combined with compulsive utterances."

Adams and Victor's Principles of Neurology

Quick Summary

Feature	Tic	Compulsion (OCD)
Trigger	Bodily/sensory urge	Obsessive fear/thought
Goal	Relieve physical tension	Prevent harm / reduce anxiety
Insight	Person knows it seems odd	Person knows it's irrational
Anxiety level	Low	High
Suppressible?	Yes, briefly (with effort)	Can resist briefly (with great distress)
Thought content	Minimal	Prominent, intrusive
Brain circuit	Basal ganglia (motor loop)	Basal ganglia + orbitofrontal cortex
Often co-occur?	Yes - up to 50% of Tourette cases have OCD

Treatment differences

	Tics	OCD
Behavioral therapy	Habit Reversal Training / CBIT	Exposure and Response Prevention (ERP)
Medication	Antipsychotics (haloperidol, risperidone), alpha-2 agonists	SSRIs (fluoxetine, sertraline), clomipramine

Sources: Kaplan & Sadock's Comprehensive Textbook of Psychiatry; Adams and Victor's Principles of Neurology; Bradley and Daroff's Neurology in Clinical Practice

Restlessness

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Here is a thorough but plain-language breakdown of restlessness and its medical forms:

Restlessness - Explained Simply

What is restlessness?

Restlessness is the feeling that you cannot stay still - a persistent inner unease that drives you to keep moving, fidgeting, pacing, or shifting. It is both a subjective experience (you feel it inside) and an observable behavior (others can see it).

In medicine, restlessness is not just one thing - it is a symptom that appears in several distinct conditions, each with a different cause and mechanism.

The Main Medical Forms of Restlessness

1. Psychomotor Agitation

The type seen in psychiatric illness - covered in the previous topic. Driven by emotional/mental disturbance (anxiety, mania, depression). The restlessness is a physical expression of a turbulent mental state.

Examples: pacing, hand-wringing, fidgeting, pressured speech in mania or anxiety.

2. Akathisia - "The inability to sit still"

The word comes from Greek: a (without) + kathizein (to sit). First described by Haskovec in 1904.

What it feels like:

An intense inner feeling of restlessness - not just wanting to move, but being compelled to
A deep discomfort or dysphoria that only moving temporarily relieves
Difficulty concentrating because the urge to move is so distracting

What it looks like:

Constantly shifting body and legs while seated
Crossing and uncrossing legs, swinging the free leg
Rocking, shifting weight from foot to foot
Pacing, marching in place when standing
Unable to stay seated for more than a short time
Picking at clothing or hair, rubbing body parts

Key causes:

Antipsychotic (neuroleptic) drugs - most common cause
SSRIs (antidepressants)
Parkinson's disease and Alzheimer's disease
Can also occur in unmedicated psychiatric patients

Antipsychotic risk varies widely:

Low risk: quetiapine, sertindole, brexpiprazole
High risk: haloperidol, lurasidone, cariprazine
Risk increases with dose and rapid dose escalation

Why it matters clinically: Akathisia is a major reason psychiatric patients stop taking their medication - the inner restlessness is deeply distressing. It has also been linked to suicidal ideation in some patients, though this remains under study.

Treatment:

Reduce or switch the antipsychotic dose
Add a beta-blocker (propranolol)
Add a 5-HT2A antagonist (mirtazapine, mianserin)
Anticholinergics (benztropine, amantadine)
Vitamin B6 (emerging evidence, favorable tolerability)

Tardive akathisia - a rare, severe, and persistent form that can be very disabling.

3. Restless Legs Syndrome (RLS)

A neurological sleep/sensory disorder - distinct from akathisia, though they can look similar.

What it feels like:

Uncomfortable sensations in the legs - crawling, drawing, creeping, tingling, or an aching urge
Not just restlessness - there is an actual unpleasant sensation in the legs
Worse at rest (lying down, sitting) - especially in the evening and at night
Temporarily relieved by moving, walking, or stretching

Diagnosis criteria (International RLS Study Group):

Urge to move legs, usually with uncomfortable sensations
Symptoms begin or worsen during rest or inactivity
Symptoms are relieved by movement (at least while moving)
Symptoms are worse in the evening or night

Brain basis: Disrupted dopamine signaling - iron deficiency is a key contributing factor (iron is needed to make dopamine).

Common in: Chronic kidney disease/dialysis patients, pregnancy, iron deficiency, Parkinson's disease.

Treatment: Dopamine agonists (pramipexole, ropinirole), gabapentin, iron supplementation, lifestyle changes (reduce caffeine, alcohol, nicotine).

Key Differences: Akathisia vs. Restless Legs Syndrome

Feature	Akathisia	Restless Legs Syndrome
Location	Whole body restlessness	Mainly the legs
Sensation	Inner mental dysphoria/unease	Physical crawling/tingling sensation in legs
Timing	Any time, worse when still	Mainly evenings/nights, at rest
Relieved by	Moving around	Moving legs
Cause	Medications (antipsychotics, SSRIs)	Dopamine/iron disruption
Sleep affected?	Indirectly	Directly - primary sleep disorder

"Patients with restless legs describe a crawling or drawing sensation in the legs rather than an inner restlessness, although both disorders create an irresistible desire for movement. At times these distinctions are blurred." - Adams and Victor's Principles of Neurology

Other Causes of Restlessness to Know

Condition	Why it causes restlessness
Anxiety disorders	Fight-or-flight activation - body primed to act
Mania	Excess psychomotor energy, reduced need for sleep
Hyperthyroidism	Excess thyroid hormone revs up the whole nervous system
Stimulant drug use	Dopamine/noradrenaline flooding the brain
Delirium (hyperactive)	Confused brain producing agitated behavior
Withdrawal states	Alcohol, benzodiazepine, opioid withdrawal - autonomic storm
Pain	Constant discomfort drives movement seeking

Summary

Restlessness is an umbrella symptom with multiple causes:

Akathisia - drug-induced inner compulsion to move; distressing mental dysphoria
Restless Legs Syndrome - sensory discomfort in the legs at rest; a neurological/sleep disorder
Psychomotor agitation - emotional/psychiatric overactivation expressed physically
All share the common thread: an irresistible urge to move that temporarily relieves an uncomfortable inner state

Sources: Adams and Victor's Principles of Neurology; Goldman-Cecil Medicine; Maudsley Prescribing Guidelines in Psychiatry, 15th ed.; Brenner and Rector's The Kidney

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