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Supplementary motor area aphasia: a case report
1Department of Neurology, National Cheng Kung University Hospital, Tainan, Taiwan. pair@mail.ncku.edu.tw
Clinical Neurology and Neurosurgery
|June 1, 1999
Summary
A rare case of supplementary motor area (SMA) infarct caused aphasia in a 72-year-old woman. The patient exhibited deficits in initiating language production, impacting spontaneous speech and writing.
Area of Science:
- Neurology
- Neuroscience
- Linguistics
Background:
- The supplementary motor area (SMA) is crucial for motor planning and initiation.
- Aphasia, a language disorder, typically results from damage to dominant hemisphere language centers.
- Infracts in the SMA are infrequently associated with aphasia.
Observation:
- A 72-year-old woman experienced aphasia following a left SMA infarct.
- Clinical presentation included right hemiparesis (leg > arm), leftward gaze preference, and reduced spontaneity.
- Neuropsychological assessment revealed significant deficits in language initiation.
Findings:
- The patient demonstrated preserved ability to respond to questions, name objects, and repeat speech.
- Difficulties were noted in spontaneous speech, reading aloud, spontaneous writing, and writing to dictation.
- The ability to copy written material remained intact.
Implications:
- This case highlights the SMA's role in language production, particularly initiation.
- SMA aphasia presents with a unique profile distinct from typical aphasia syndromes.
- Further research is needed to understand the neural mechanisms underlying SMA-related language deficits.