The thoracic spinal nerve 1 (T1) is a
spinal nerve
A spinal nerve is a mixed nerve, which carries Motor neuron, motor, Sensory neuron, sensory, and Autonomic nervous system, autonomic signals between the spinal cord and the body. In the human body there are 31 pairs of spinal nerves, one on each s ...
of the
thoracic segment.
American Medical Association
Nervous System -- Groups of Nerves
It originates from the spinal column from below the thoracic vertebra 1 (T1).
Additional images
File:Slide6y.JPG, Thoracic spinal nerve 1
References
Spinal nerves
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