The thoracic spinal nerve 1 (T1) is a

spinal nerve A spinal nerve is a mixed nerve, which carries motor, sensory, and autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each side of the vertebral column. These are grouped into the ...

of the

thoracic segment The spinal cord is a long, thin, tubular structure made up of nervous tissue, which extends from the medulla oblongata in the brainstem to the lumbar region of the vertebral column (backbone). The backbone encloses the central canal of the spinal ...

.American Medical Association
Nervous System -- Groups of Nerves It originates from the spinal column from below the

thoracic vertebra 1 In vertebrates, thoracic vertebrae compose the middle segment of the vertebral column, between the cervical vertebrae and the lumbar vertebrae. In humans, there are twelve thoracic vertebrae and they are intermediate in size between the cervical ...

(T1).

Additional Images

File:Slide6y.JPG, Thoracic spinal nerve 1

References

Spinal nerves {{neuroanatomy-stub