What are the ten spinal nerves?
Humans have 31 left–right pairs of spinal nerves, each roughly corresponding to a segment of the vertebral column: eight cervical spinal nerve pairs (C1–C8), 12 thoracic pairs (T1–T12), five lumbar pairs (L1–L5), five sacral pairs (S1–S5), and one coccygeal pair.
Are there more than 100 pairs of spinal nerves?
How many spinal nerve pairs exit the spinal cord? There are 31 pairs of spinal nerves (8 cervical, 12 thoracic, 5 lumbar, 5 sacral, and 1 coccygeal). Because there are only seven cervical vertebrae, the first seven cervical nerves exit above the same numbered cervical vertebrae.
Which spinal nerves affect which parts of the body?
The nerves of the cervical spine go to the upper chest and arms. The nerves in your thoracic spine go to your chest and abdomen. The nerves of the lumbar spine then reach to your legs, bowel, and bladder. These nerves coordinate and control all the body’s organs and parts, and let you control your muscles.
Do spinal nerves have names?
There are eight pairs of cervical nerves, twelve pairs of thoracic nerves, five pairs of lumbar nerves, five pairs of sacral nerves, and one pair of coccygeal nerves. The spinal nerves are part of the peripheral nervous system.
What part of the spine controls the shoulders?
The C4 dermatome covers parts of the neck, shoulders, and upper part of arms. C5 helps control the deltoids (which form the rounded contours of the shoulders) and the biceps (which allow bending of the elbow and rotation of the forearm). The C5 dermatome covers the outer part of the upper arm down to about the elbow.
Do all nerves run through the spine?
The nerve roots pass out of the spinal canal through the intervertebral foramen, where they feed the body either anteriorly (motor) or posteriorly (sensory). The anterior divisions supply the front of the spine including the limbs.
Nerve Structures of the Spine.
|SPINAL CORD||31 Pairs – Spinal Nerves|
What nerves are in the back?
The 8 cervical spinal nerves are C1 through C8, the 12 thoracic spinal nerves are T1 through T12, the 5 lumbar spinal nerves are L1 through L5, and the 5 sacral spinal nerves are S1 through S5. There is 1 coccygeal nerve.
How does damage to the spinal cord and nerves affect the other parts of the body?
A spinal cord injury stops the flow of messages below the site of the injury. The closer the injury is to the brain, the more of the body is affected. Injury to the middle of the back usually affects the legs (paraplegia). Injury to the neck can affect the arms, chest, and legs (quadriplegia).