A motor dysphasia is is caused by a lesion of the inferior frontal gyrus of the dominant frontal lobe - specifically, Broca's area.
It is characterised by:
In testing for this form of dysphasia the patient should be asked to talk about something - the choice of subject will vary from patient to patient. The patient might use elaborate descriptions to get around their inability to find a particular word - circumlocution, and they may substitute words whose meaning is not quite correct.
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