its either the vagus or optic nerve
most, if not all, nerves connect to the spinal cord, which is an extremely large nerve that conncts to the brain.
cerebr
Nerves
Corpus collosum.
Nerves connect to the brain and spinal cord in order to communicate with the rest of the body.
Cranial nerves
Peripheral nervous system
The 12 cranial nerves connect to various structures in the human body, including the brain, head, neck, and some internal organs.
The optic nerves connect the brain and eyes.
Spinal cord
31
The spinal cord acts to connect the nerves of the body to the brain