M Pure Motor Aphasia

Verbal apraxia or pure motor aphasia refers to the articulatory and prosodic disturbance of language output in the absence of the agrammatic component. The underlying lesion is said to involve the left lower motor cortex and posterior operculum. Recently, Nina Dronkers emphasized the relationship between articu-latory deficits and damage to the precentral gyrus of the insula.

This clinical syndrome is characterized by impaired articulation, slow and effortful speech, segmentation, phonemic paraphasias, dysprosody, and occasional hypophonia. The outcome for pure motor aphasia ranges from full recovery to a status of normal language with persistent dysarthria and/or dysprosody.

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