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Areas the Nerves Control

Areas of the body affected by spinal cord injuries

The nerves in the area of a vertebra control specific parts of the body. For example, the 7th cervical nerve (C7) in the neck area controls the triceps (the muscle in the upper arm), while the thoracic nerves (T2 through T7) control the chest muscles.

In a spinal cord injury, complete or partial paralysis occurs in the areas of the body that are controlled by the nerves associated with the damaged vertebrae and those below the damaged vertebrae. The higher the injury on the spinal cord, the more paralysis there is. For example, damage high on the spinal cord, in the cervical segment, can result in paralysis of the chest, arms, and legs (tetraplegia, also known as quadriplegia). Damage lower down on the spine (thoracic, lumbar, or sacral segments) can result in paralysis of the legs and lower body (paraplegia). Breathing is affected only by injuries high on the spinal cord. But bowel and bladder control can be affected no matter where the spinal cord in injured.

Current as of: March 28, 2019

Author: Healthwise Staff
Adam Husney, MD - Family Medicine
Martin J. Gabica, MD - Family Medicine
Kathleen Romito, MD - Family Medicine
Nancy E. Greenwald, MD - Physical Medicine and Rehabilitation


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