Nerve

A nerve fiber is a collection of both myelinated and unmyelinated dendrites and axons of neurons. A nerve is a group of nerve fibers.

Cranial nerves are originated from brainstem? and they mainly control the functions of the anatomic structures of the head. There are 12 pairs of cranial nerves:

• olfactory
• optic
• oculomotor
• trochlear
• trigeminal
• abducent
• facial
• vestibulo-cochlear
• glossopharyngeal
• vagus
• accessory
• hypoglossal

Spinal nerves take their origins from the [spinal cord]?. They control the functions of the rest of the body. There are 31 pairs of spinal nerves: 8 cervical, 12 thoracic, 5 lumbar, 5 sacral and 1 coccygeal.