MEDICAL PHYSIOLOGY

Detailed explanation-1: -Spinal nerves are mixed nerves that interact directly with the spinal cord to modulate motor and sensory information from the body’s periphery. Each nerve forms from nerve fibers, known as fila radicularia, extending from the posterior (dorsal) and anterior (ventral) roots of the spinal cord.

Detailed explanation-2: -Spinal nerves arise from the cervical cord. Each nerve consists of a dorsal sensory root and a ventral motor root. The nerve roots join just lateral to the dural sheath to form the spinal nerves.

Detailed explanation-3: -Cauda equina – The collection of nerves at the end of the spinal cord that resembles a horse’s tail. Cervical spine – The neck region of the spine consisting of the first seven vertebrae.

Detailed explanation-4: -The dorsal root ganglion for each nerve is an enlargement of the spinal nerve. There are 31 spinal nerves, named for the level of the spinal cord at which each one emerges.

Detailed explanation-5: -For a small distance, the nerves actually travel through the spinal canal before exiting out the neural foramen. This collection of nerves is called the cauda equina while it is still inside the spinal canal. A protective membrane called the dura mater covers the spinal cord.