1.1 (in full elective mutism) Unwillingness or refusal to speak, arising from psychological causes such as depression or trauma.
- A 14-year-old boy with a pre-existing history of autism exhibited stupor with mutism, akinesia, rigidity, waxy flexibility, posturing, facial grimacing and involuntary movements of the upper extremities.
- Selective mutism is an anxiety disorder that is usually specific to certain settings, such as a school classroom.
- Others suffered from psychoneurotic symptoms alone - mutism, loss of speech, hysterical twitching, and uncontrollable jerkings of arms and legs.
Early 19th century: from French mutisme, from Latin mutus 'mute'.
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