MICROANATOMY

Detailed explanation-1: -The term plexus refers to a “web” of nerves that is created just lateral to where T12-L5 exit the spinal cord via intervertebral foramina. The plexus exists bilaterally and allows nerves to combine with different levels to create multiple functioning nerves that serve to innervate various structures.

Detailed explanation-2: -The cervical plexus provides nerve connections to the head, neck, and shoulder. The brachial plexus provides connections to the chest, shoulders, upper arms, forearms, and hands. The lumbar plexus provides connections to the back, abdomen, groin, thighs, knees, and calves.

Detailed explanation-3: -A network of adjacent spinal nerves is called a plexus. The largest nerve in the body comes from the sacral plexus, combining the L4 through S2 spinal nerves.