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Thoracic spinal nerve

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Definition

noun, plural: thoracic spinal nerves

Any of the twelve pairs of nerves that emerge from the thoracic region of the spinal cord, through the thoracic vertebrae of the vertebral column, and proceed to the paravertebral ganglia of the autonomic nervous system


Supplement

The spinal nerve is a nerve that occurs in pairs emerging from the spinal cord. Each pair is attached to the cord by two roots, i.e. the anterior (ventral) and posterior (dorsal) roots. Although these two roots unite in the intervertebral foramen they divide again into anterior division (or ventral ramus) and posterior division (or dorsal ramus).1 In humans, there are 31 pairs of spinal nerves emerging from the spinal cord and are grouped based on the corresponding regions of the vertebral column, i.e. cervical spinal nerves, thoracic spinal nerves, lumbar spinal nerves, sacral spinal nerves, and coccygeal spinal nerves. These nerves emerge from the spinal cord through an opening called intervertebral foramen (an opening between adjacent vertebrae of the vertebral column).

The thoracic spinal nerves are spinal nerves emerging from the thoracic region of the spinal cord. They all emerge above their corresponding vertebrae. The thoracic spinal nerves are as follows:

  • thoracic spinal nerve 1 (T1)
  • thoracic spinal nerve 2 (T2)
  • thoracic spinal nerve 3 (T3)
  • thoracic spinal nerve 4 (T4)
  • thoracic spinal nerve 5 (T5)
  • thoracic spinal nerve 6 (T6)
  • thoracic spinal nerve 7 (T7)
  • thoracic spinal nerve 8 (T8)
  • thoracic spinal nerve 9 (T9)
  • thoracic spinal nerve 10 (T10)
  • thoracic spinal nerve 11 (T11)
  • thoracic spinal nerve 12 (T12)


See also:


Reference(s):
1 spinal nerve. (n.d.). The American Heritage® Science Dictionary. Retrieved from Dictionary.com website http://www.dictionary.com/browse/spinal-nerve