A spinal nerve is a bundle of nerve fibers that emerges from the spinal cord, which is part of the central nervous system. Each spinal nerve is formed by the joining of two roots: the dorsal root, which carries sensory information from the body to the spinal cord, and the ventral root, which transmits motor commands from the spinal cord to the muscles. There are 31 pairs of spinal nerves in humans, each corresponding to a specific segment of the spine. Spinal nerves are crucial for communication between the brain and the rest of the body. They are responsible for both voluntary movements and involuntary reflexes. Each spinal nerve innervates a specific area of the body, known as a dermatome for sensory functions and a myotome for motor functions. Proper functioning of spinal nerves is essential for maintaining bodily coordination and response to stimuli.