The premotor cortex and SMA converge on very large cells located in _________ of primary motor cortex.
A) pyramidal cells in Layer III
B) pyramidal cells in Layer V
C) Purkinje cells in Layer III
D) Purkinje cells in Layer V

Question

Quizplus · Accepted Answer

The premotor cortex and SMA converge on pyramidal cells in Layer V of primary motor cortex, where the initiation and execution of voluntary movements are thought to occur. These cells are also known as Betz cells and are the largest cells in the human brain, with long axons that extend to the spinal cord to control movements.

The Premotor Cortex and SMA Converge on Very Large Cells