Question

The cell bodies of upper motoneurons are primarily found in which of the following locations?

1) Primary motor cortex (precentral gyrus)
2) Red nucleus
3) Reticular formation
4) Lateral vestibular nuclei of brain stem

Answer 1

The cell bodies of upper motoneurons are primarily found in the primary motor cortex (precentral gyrus) in the frontal lobe.

Step-by-step explanation:

The cell bodies of upper motoneurons are primarily found in the primary motor cortex (precentral gyrus). The primary motor cortex, located in the frontal lobe, is responsible for generating motor commands and instructing cells in the spinal cord to move skeletal muscles. This region of the cerebral cortex contains the upper motor neurons that stimulate spinal cord neurons, leading to skeletal muscle contraction.