Question

Which cortical region exerts control over the red nucleus?

a) Primary motor cortex (M1)
b) Premotor cortex
c) Supplementary motor area (SMA)
d) Precentral gyrus

Answer 1

The cortical region that controls the red nucleus is the primary motor cortex, located in the precentral gyrus. This region is responsible for initiating voluntary movements and connects to lower motor neurons.

Step-by-step explanation:

The cortical region that exerts control over the red nucleus is part of the motor pathways in the brain. The precentral gyrus, also known as the primary motor cortex (M1), is responsible for initiating voluntary movements by connecting to cranial and spinal motor neurons. Upper motor neurons originate in the primary motor cortex and target lower motor neurons, which in turn stimulate skeletal muscles. The premotor cortex and the supplementary motor area (SMA) are involved in planning and coordinating movements but do not directly exert control over the red nucleus.