Pantomime comprehension and ideomotor apraxia.

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Abstract
Apraxic patients with posterior infarctions that included the parietal lobe could not discriminate between gestures in a prior study. These observations were replicated using a nonverbal paradigm in which the subjects did not have to discriminate between gestures, but instead had to comprehend their meaning. Pantomimed acts on videotape were shown to 6 apraxic-aphasic patients, 7 nonapraxic-aphasic patients and 6 normal subjects. Four drawings were also shown, 1 of which matched the pantomine (for example, if the pantomine was of hammering, 1 drawing was of a nail and 3 were foils). Subjects responded by pushing a button corresponding to the desired picture. The apraxics made more errors than the aphasics or controls.

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