MEDICAL PHYSIOLOGY

Detailed explanation-1: -A single motor neuron, however, can innervate many muscle fibers. The combination of an individual motor neuron and all of the muscle fibers that it innervates is called a motor unit. The number of fibers innervated by a motor unit is called its innervation ratio.

Detailed explanation-2: -A motor neuron (or motoneuron or efferent neuron) is a neuron whose cell body is located in the motor cortex, brainstem or the spinal cord, and whose axon (fiber) projects to the spinal cord or outside of the spinal cord to directly or indirectly control effector organs, mainly muscles and glands.

Detailed explanation-3: -Alpha motor neurons (also known as lower or skeletal motor neurons) have been studied extensively for over 100 years. Motor neurons control the contraction of skeletal muscles and thus are the final common pathway in the nervous system responsible for motor behavior.

Detailed explanation-4: -Small motor neurons innervate relatively few muscle fibers and form motor units that generate small forces, whereas large motor neurons innervate larger, more powerful motor units.

Detailed explanation-5: -Motor pool. All of the motor neurons that innervate the fibers of a single muscle are called its motor poo..