### body part | tissue | nerve:

Cranial nerve
* Many cranial nerves contain more than one type of neuron.
* Most cranial nerves enter and exit the brain from the medulla and rostrally adjacent pons.
* Some cranial nerves are mixed nerves with both sensory and motor functions
  - visible
* appear intact.
* are brains
  - grossly intact
  - nerves of brain
* arise mainly from the ventral brainstem.
* carry impulses to and from the brain.
* emerge from the brain and the spinal nerves emerge from the spinal cord.
* go to the eye muscles
  - side of the face
* move eyes together usually.

### body part | tissue | nerve | cranial nerve:

Facial nerve
* innervates the muscles of facial expression.
* is examined via transmastoid, translabyrinthine approach in transverse fractures.

Optic nerve
* are cranial nerves
  - part of visual systems
  - sensory nerves
* is normal bilaterally
  - the nerve of vision
* vary in their ability to resist the damaging effects of intraocular pressure.

Dorsal root
* are nerve branches radiating from the main spinal cord in the back or chest area.
* carry sensory fibers.

### body part | tissue | nerve | efferent:

Somatic efferent
* exit the spinal cord a. in the region of the cervical vertebrae.
* supply a. smooth muscle cells.

Ventral root
* carry motor fibers, both somatic and visceral.
* is an efferent

### body part | tissue | nerve:

Motor nerve
* are affected by mercury toxicity
  - in the cell body between the axons and dendrites
  - responsible for voluntary movement, muscle tone and coordination
  - usually more involved than sensory
* carry messages from the brain and spinal cord to various parts of the body
  - for the contraction of different muscles
  - to muscles to make the body move
* cause movement through the action of muscles.
* contain motor neurones.
* control eye movement
  - limbs
* innervate the blood vessels, sweat glands and the arrector pill muscle.
* mediate joint position sense and sensory nerves mediate kinesthetic awareness.
* use electrical signals to make muscles move.

### body part | tissue | nerve:

Peripheral nerve
* Most peripheral nerves are mixed nerves, meaning they contain both sensory and motor neurons.
* are actually bundles of single nerve fibers
  - among the longest in the body
  - like electrical wires
  - repeatedly st imulated at a specific rate, and the impulses are recorded
* can no longer send messages that require immediate action.
* connect the spinal cord and the brain to all other organs of the body.
* consist of many fascicles that contain myelinated and unmyelinated axons.
* do heal, but only slowly so it can take months for symptoms to subside.
* go to the arms, hands, legs, and feet.
* pass out from the various ganglia to supply different parts of the body.
* supply muscles.

Sciatic nerve
* are no exception.
* become relaxed when there is an external application of the oil of the guggulu.

### body part | tissue | nerve:

Sensory nerve
* Most sensory nerves respond to stimulation.
* allow the brain to feel pain, touch, temperature, and vibration.
* are found throughout the skin
  - long and are found in various parts of the body
* carry nerve impulses from to the central nervous system
  - signals from the sense organs to the brain or spinal cord
* contain sensory neurones.
* enter it, bringing information to the brain about our world
  - the spinal cord and synapse with small interneurons within
* exert a trophic influence on the corneal epithelium.
* help to carry the signal of pain to the brain.
* lead to the brain and spinal cord and relay sensations from the body.
* respond to more than one type of energy
* travel with the autonomic nerves, and both are damaged by the same process.

Small nerve
* arise from the longitudinal nerves to supply the body muscles and sensory endings.
* branch off from the nerve cords to the rest of the body.
* extend from the ganglia to the body surface and the muscles.