MEDICAL PHYSIOLOGY

Detailed explanation-1: -The basic unit of communication in the nervous system is the nerve cell (neuron). Each nerve cell consists of the cell body, which includes the nucleus, a major branching fiber (axon) and numerous smaller branching fibers (dendrites).

Detailed explanation-2: -For the spinal cord though, we can say that there are three types of neurons: sensory, motor, and interneurons.

Detailed explanation-3: -This way, the first neuron in the pathway (the upper motor neuron) arises in the cerebral cortex or brainstem, descends along the spinal cord and synapses in the anterior gray horn. The second neuron in the pathway (lower motor neuron) leaves the spinal cord through the anterior(ventral) root.