In the period of time immediately following focal brain injury to the supplementary motor cortex,patients may reach out and grasp objects with the affected arm when they have not been asked to do so,or even when they have been explicitly told not to do so.This is called
A)apraxia.
B)hemiplegia.
C)Huntington's disease.
D)alien hand syndrome.

Question

Quizplus · Accepted Answer

The described symptoms are characteristic of alien hand syndrome, which is a neurological condition where the affected hand seems to have a will of its own, performing involuntary and often spontaneous actions. It is typically a result of damage to the corpus callosum or frontal and parietal lobes, which disrupts communication between the two halves of the brain and can cause conflicting motor commands. Apraxia refers to the inability to perform purposeful movements despite intact sensation and muscle strength, while hemiplegia is paralysis on one side of the body, often seen after a stroke. Huntington's disease is a genetic disorder that affects various aspects of cognition and movement, but it does not present with the specific symptoms described in the question.

In the Period of Time Immediately Following Focal Brain Injury