A psychomotor syndrome #
Catatonia is a syndrome involving a combination of disturbances in movement, speech and responsiveness. Activity may be markedly reduced, increased or qualitatively unusual. It is not simply immobility and is not confined to schizophrenia. It can occur with mood, psychotic, neurodevelopmental and medical conditions, and in relation to medication or substance exposure and withdrawal.
Diagnosis requires a competent clinical assessment of a pattern of signs, course and context. A single sign such as silence or staring is not enough. Assess possible underlying conditions and physical complications alongside the psychomotor findings. A person who does not respond may still understand and later remember the encounter.
Describe signs precisely #
| Sign | Meaning |
|---|---|
| Stupor | Marked reduction in movement and engagement with the environment. |
| Mutism | Absent or markedly reduced verbal response, not explained simply by the language used. |
| Posturing | Spontaneous maintenance of a posture against gravity. |
| Catalepsy | Maintenance of a posture placed through passive examination. |
| Waxy flexibility | A characteristic slight resistance during repositioning, with a posture then maintained; requires examination. |
| Negativism | Opposition or absence of response to prompts, beyond an adequately explained communication problem. |
| Echolalia / echopraxia | Repetition of another person’s speech / imitation of another person’s movements. |
| Stereotypy / mannerism | Repetitive apparently purposeless activity / an unusual stylised version of an ordinary action. |
| Ambitendency | Apparently hesitant, conflicted movement, as though unable to complete or withhold an action. |
| Excitement | Marked excessive activity not adequately explained by an ordinary external stimulus. |
Definitions and examination conventions vary between systems. Describe what occurred and how it was assessed. Distinguish reduced speech from impaired language, apparent opposition from fear or misunderstanding, and abnormal postures from painful musculoskeletal conditions.
Observation, enquiry and physical assessment #
Observe before, during and after direct interaction. Offer simple, respectful prompts and explain what is happening. Skilled physical examination is needed for signs involving tone, passive movement and postural maintenance; do not use painful manoeuvres or force awkward positions as a demonstration.
- Establish onset, fluctuation, baseline functioning and prior episodes through the person and collateral sources.
- Review recent medication changes, missed doses, withdrawal and substance exposure without independently recommending a medication change.
- Examine arousal, attention, neurological findings and relevant systemic illness.
- Assess intake, hydration, swallowing, mobility, skin pressure areas and other complications.
- Document vital signs and signs of acute physical instability.
- A validated rating instrument can support systematic recording; it does not replace assessment or create an automatic diagnosis.
Overlapping presentations #
| Presentation | What requires clarification |
|---|---|
| Delirium | Acute fluctuation of attention and cognition; catatonic features may coexist, especially in medically ill people. |
| Medication-associated movement disorder | Tremor, rigidity, dystonia, akathisia or dyskinesia require their own assessment. |
| Severe depressive slowing | Reduced activity alone is not the whole catatonic syndrome. |
| Seizure or neurological disorder | Unresponsiveness or unusual movements may require neurological evaluation. |
| Neurodevelopmental baseline | Repetitive movements or reduced speech must be compared with the person’s usual functioning. |
| Communication barriers or distress | Silence and non-engagement must not automatically be regarded as wilful resistance. |
Synthetic observation and documentation #
When physical findings change the priority #
Do not describe immobility as harmless because the person is quiet. Prolonged reduced movement and intake can contribute to serious complications. Clinical evaluation needs to consider these even before the cause of the psychomotor syndrome is fully established.
Common pitfalls #
- Do not assume that catatonia means schizophrenia or deliberate refusal.
- Do not infer lack of comprehension from mutism.
- Do not treat rating-scale thresholds as automatic clinical decisions.
- Echophenomena and stereotypies are not specific in isolation.
- A first or changed presentation needs medical and neurological context, not only psychiatric labelling.