The substantia nigra:
A) contains dopamine-producing neurons and is involved in motor control.
B) is the region that has shown the greatest degree of neurogenesis in humans.
C) is the primary communication link between the left and right cerebral hemispheres.
D) is a hindbrain structure that controls vital life functions such as breathing and circulation.

Question

Quizplus · Accepted Answer

The substantia nigra contains dopamine-producing neurons and is involved in motor control. It plays a key role in Parkinson's disease, which is characterized by the degeneration of these neurons.

B, C, and D are all incorrect. The substantia nigra is not the region with the greatest degree of neurogenesis in humans (B), nor is it the primary communication link between the left and right cerebral hemispheres (C). It is also not a hindbrain structure that controls vital life functions such as breathing and circulation (D).

The Substantia Nigra