The activity in a person's brain can be visualized using positron emission tomography (PET).If the person is touching different objects with his right hand, where would you expect to see increased activity related to his hand movements?
A) The right side of the hypothalamus
B) The left side of the hippocampus
C) The left hemisphere of the cerebral cortex
D) The right hemisphere of the cerebral cortex
E) The right side of the brainstem

Question

Quizplus · Accepted Answer

The primary motor cortex, responsible for controlling voluntary movements, is located in the precentral gyrus of the frontal lobe of the cerebral cortex. Since the brain's structure is cross-wired, movements in the right hand are controlled by the left hemisphere of the cerebral cortex. Therefore, touching different objects with the right hand would show increased activity in the left hemisphere of the cerebral cortex.

The Activity in a Person's Brain Can Be Visualized Using