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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
February 16, 2011
Anne C. Poinier, MD - Internal Medicine & Nancy Greenwald, MD - Physical Medicine and Rehabilitation
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