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 an example of
A)apraxia.
B)hemiplegia.
C)Huntington's disease.
D)alien hand syndrome.

Question

Quizplus · Accepted Answer

The behavior described is characteristic of alien hand syndrome, which can occur following damage to the supplementary motor cortex. In this condition, the affected hand appears to have a mind of its own and can act independently, even against the wishes of the patient. This can include actions such as reaching out and grabbing objects without conscious control or intent. Apraxia refers to a loss of the ability to carry out skilled movements, while hemiplegia is a paralysis affecting one side of the body. Huntington's disease is a neurodegenerative disorder that can cause a range of symptoms including involuntary movements and cognitive decline, but it is not specifically related to the behavior described in the question.

In the Period of Time Immediately Following Focal Brain Injury