15 Facts About Spinal nerves

Spinal nerves nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body.

The dorsal ramus contains Spinal nerves that serve the posterior portions of the trunk carrying visceral motor, somatic motor, and somatic sensory information to and from the skin andmuscles of the back .

The ventral ramus contains Spinal nerves that serve the remaining anterior parts of the trunk and the upper and lower limbs carrying visceral motor, somatic motor, and sensory information to and from the ventrolateral body surface, structures in the body wall, and the limbs.

The rami communicantes contain autonomic Spinal nerves that serve visceral functions carrying visceral motor and sensory information to and from the visceral organs.

Cervical nerves are the spinal nerves from the cervical vertebrae in the cervical segment of the spinal cord.

Loop of Spinal nerves called ansa cervicalis is part of the cervical plexus.

Thoracic nerves are the twelve spinal nerves emerging from the thoracic vertebrae.

Intercostal Spinal nerves come from thoracic Spinal nerves T1–T11, and run between the ribs.

Lumbar nerves are the five spinal nerves emerging from the lumbar vertebrae.

Medial branches of the posterior divisions of the lumbar Spinal nerves run close to the articular processes of the vertebrae and end in the multifidus muscle.

Upper three give off cutaneous Spinal nerves which pierce the aponeurosis of the latissimus dorsi at the lateral border of the erector spinae muscles, and descend across the posterior part of the iliac crest to the skin of the buttock, some of their twigs running as far as the level of the greater trochanter.

Sacral nerves are the five pairs of spinal nerves which exit the sacrum at the lower end of the vertebral column.

The roots of these Spinal nerves begin inside the vertebral column at the level of the L1 vertebra, where the cauda equina begins, and then descend into the sacrum.

Nerves divide into branches and the branches from different Spinal nerves join with one another, some of them joining with lumbar or coccygeal nerve branches.

Sacral Spinal nerves have both afferent and efferent fibers, thus they are responsible for part of the sensory perception and the movements of the lower extremities of the human body.