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In the fourth revision of the DSM , tic disorders were classified as follows: [12] Transient tic disorder consisted of multiple motor and/or phonic tics with duration of at least 4 weeks, but less than 12 months. Chronic tic disorder was either single or multiple motor or phonic tics, but not both, which were present for more than a year.
In this condition, expressive gestures are rare and there is little animation in facial expression or vocal inflection. [1] Additionally, reduced affect can be symptomatic of autism, schizophrenia, depression, post-traumatic stress disorder, depersonalization-derealization disorder, [2] [3] [4] schizoid personality disorder or brain damage. [5]
Psychomotor agitation is typically found in various mental disorders, especially in psychotic and mood disorders. It can be a result of drug intoxication or withdrawal. It can also be caused by severe hyponatremia. People with existing psychiatric disorders and men under the age of 40 are at a higher risk of developing psychomotor agitation. [2]
Stereotypic movement disorder is often misdiagnosed as tics or Tourette syndrome (TS). [6] [7] Unlike the tics of TS, which tend to appear around age six or seven, repetitive movements typically start before age three, [1] [8] are more bilateral than tics, and consist of intense patterns of movement for longer runs than tics. Tics are less ...
No definitive cause of tic disorders has been declared, but for the most part, the cause lies within biological, chemical, or environmental factors. Studies have shown that abnormal neurotransmitters, such as dopamine and serotonin, which are active in chemical messages in the brain, can serve as a cause of tic disorders.
A revision of DSM-5, titled DSM-5-TR, was published in March 2022, updating diagnostic criteria and ICD-10-CM codes. [52] The diagnostic criteria for avoidant/restrictive food intake disorder were changed, [53] [54] along with adding entries for prolonged grief disorder, unspecified mood disorder and stimulant-induced mild neurocognitive disorder.