Catatonia

Catatonia is a syndrome, a set of signs rather than one disease, in which movement, speech and behavior are disturbed.^1,2 It appears in psychiatric, medical and neurological conditions and is classified in DSM-5-TR and ICD-11.¹ Its signs fall into three groups: motor signs such as stupor, posturing, rigidity and reduced movement; speech signs such as mutism, echolalia and stereotyped speech; and behavioral signs such as agitation and withdrawal.² Severe catatonia can be life-threatening, and treating it promptly can be lifesaving.^1,2

Catatonia and autism share many of these signs. Mutism, echolalia, stereotyped speech, repetitive movement, posturing, grimacing and rigidity appear in both,^3,4 and clinicians can mistake one for the other.^3,4,5,6 In 2004, Hare and Malone proposed the term "autistic catatonia" and argued that these states are not directly comparable with catatonia in severe mental illness.⁷

A systematic review and meta-analysis pooled catatonia in 10.4% of autistic people (95% confidence interval 5.8 to 18.0). It drew on 12 studies and pooled 7 of them, covering 969 people with a mean age of 21; most were male (70% to 100% across the studies), and two of the studies looked only at children and adolescents.⁸ A 2026 scoping review of 227 studies repeats that 10.4% figure and reports that the true prevalence remains uncertain, because the studies are heterogeneous and rest mostly on case series.⁹

Smaller samples vary widely. In a specialist autism clinic, 17% of people aged 15 and over had a severe worsening of catatonic features.¹⁰ A questionnaire study of young people with autism found that up to 20.2% had an existing catatonia diagnosis, reported by a parent or caregiver rather than assessed by a clinician.¹¹ In 48 autistic adolescents (11 girls, 37 boys) aged 12 to 18, catatonia was found in 18 (37.5%) on the Bush-Francis scale and in 16 (35.4%) on DSM-5 criteria, and it was more common in the group with more impaired daily functioning.¹² In 300 autistic people aged 12 to 25, 32 (10.7%) met criteria for catatonia.¹³ In 143 autistic adults at one tertiary service, 16 (11.1%) had catatonic symptoms, all with co-occurring intellectual disability.¹⁴

Because catatonia and autism share so many signs, a new episode of catatonia can read as autism getting worse. The 2026 scoping review says the overlap "hinders timely diagnosis and intervention."⁹ A review of catatonia in neurodevelopmental conditions adds that the diagnosis may need to be widened to include extreme behavior such as severe self-injury.⁵

The opposite error matters too. Because several DSM-5-TR criteria overlap with a person's usual autistic behavior, standard criteria can produce false-positive diagnoses, and one 2025 review proposes requiring at least 2 of 5 core signs, each clearly new or worse than the person's baseline.¹⁶

In one clinic study, autistic people with catatonia were more likely to have had a late loss of skills, along with more impaired social and language skills, other psychiatric conditions, and stressful life events in the previous six months.¹³ A preprint from a specialist ECT service reports that autistic patients with intellectual disability showed a cluster of "activated, repetitive, or behaviorally dysregulated" catatonic signs rather than the immobility seen in non-autistic patients. It describes this as a picture that can resemble worsening autism during a later regression, and reports that many of these signs improved during treatment, in a before-and-after comparison with no control group.¹⁵

Catatonia in autism is concentrated among people with higher support needs. In a specialist clinic, people who developed severe catatonic features were more likely to have had impaired language and a passive style of social interaction before the change began.¹⁰ In one clinic cohort of 45 autistic patients with catatonia (mean age 15.6, ages 6 to 31), 91.1% also had an intellectual disability.¹⁷ In a tertiary-service chart review, all 16 autistic adults with catatonic symptoms had an intellectual disability.¹⁴ A review also names trauma and some genetic conditions, including changes in the SHANK3 gene, as reported risk factors.⁵

How far this reflects the condition itself, rather than who is referred to these services, is not settled. Some researchers argue that catatonia should be seen as a distinct condition that co-occurs with autism, while others suggest that some repetitive behaviors counted as autism may belong to catatonia instead, and both say the question needs more study.⁶ A scoping review of autism, psychosis and catatonia together found only 17 articles, mostly single cases, with widely varying treatment results.¹⁸

Benzodiazepines such as lorazepam, and electroconvulsive therapy, are the treatments the evidence supports.^1,2 Benzodiazepines are tried first, and where they do not bring the catatonia into remission ECT is used; in some severe cases ECT is a first-line option too.¹ Case reports describe needing higher doses and longer courses for autistic people than for non-autistic patients.⁹

Some drugs make catatonia worse. The 2026 scoping review says dopaminergic agents must be used cautiously.⁹

The evidence for each treatment is thin. A systematic review of 22 papers covering 28 cases found only limited evidence for ECT, high-dose lorazepam and behavioral interventions, and rated the reporting generally poor.¹⁹ A case series of five autistic children with profound intellectual disability and minimal speech reported that all five improved on long-acting benzodiazepines without ECT; four of the five had worsened on rising antipsychotic doses before they were admitted.²⁰

Two observational cohorts describe what treatment looks like in practice. In a clinic cohort of 45 autistic patients, most received benzodiazepines and about a third received ECT, but most remained at least partly symptomatic; only 5 of the 14 who tried to stop benzodiazepines could, and three patients died over the study period.¹⁷ In one adult service, 11 of 16 patients improved quickly on lorazepam.¹⁴ A larger cohort compared 43 autistic with 67 non-autistic patients receiving ECT for catatonia: autistic patients, especially those with intellectual disability, stayed on maintenance ECT for far longer rather than receiving more intensive treatment, and both groups improved.²¹ These recent autism-specific treatment cohorts come from one research group and overlap in time, so they do not confirm each other.

A historical review argues that ECT treats catatonia and related intractable behaviors in autistic people and should be equally available to them.³ A scoping review of autism, psychosis and catatonia found treatment results that varied widely and called for larger, better-designed studies.¹⁸

Carly Jones, an autistic writer addressing professionals who support autistic girls, describes a young person who "shut down and burned out and eventually became catatonic and was hospitalized." Jones writes that catatonia "needs professional medical support," and describes her own nights of waking unable to move at all, which a doctor later named as catatonia.^c1

Pete Wharmby describes a shutdown as "reaching something approaching a state of catatonia for a short period in response to continued exposure to intolerable stress," and treats it as distinct from a meltdown.^c2

Mel Baggs, who uses a keyboard to communicate, writes that "all autistic people show traits of catatonia," but that only some develop "autistic catatonia," which Baggs calls "a movement disorder (not a psychiatric disorder) in which autistic people develop an increase in catatonic traits, have periods of slower movement, loss of speech, and an increased dependence on external prompts in order to get things done." Baggs says the people most susceptible are those whose main way of relating to others is to wait to be approached, and writes that the autistic people she knows who received electroconvulsive therapy for severe autistic catatonia "either got worse or stayed the same."^c3

Kaegan Smith, who spells on a letterboard, writes about a body that does not do what he wants: "My life was spent knowing that my body would act in opposition to my brain." He describes standing "screaming and unable to move" at a school event, and says that learning to spell gave him a way to calm his body and ask for what he needs.^c4 That is a motor difference rather than catatonia. It belongs here because catatonia is reported most often in autistic people with higher support needs, many of them nonspeaking or speaking only a little (see Who it affects), and a new loss of speech or movement in someone who cannot easily report it is the easiest kind to miss.