Nerves

Peripheral nerves
- Most peripheral nerves originate from the ventral rami of spinal nerves
- distributed via several plexuses
  - cervical
  - brachial,
    lumbosacral
- function of nerves:
  - SAME
    - Sensory = Afferent; Motor = Efferent.
  - Afferent (sensory) fibers
    - carry information toward the central nervous system.
  - Efferent (motor) fibers
    - carry impulses from the central nervous system to muscles
Autonomic nerves
- autonomic nervous system
  - controls visceral structures
  - consists of
    - parasympathetic (craniosacral)
      - Preganglionic neurons of parasympathetic nerves
        
        Arise in
        
        the nuclei of cranial nerves III, VII, lX, and X
        
        S2,S3, and S4 segments or the spinal cord
        
        synapse in peripheral ganglia.
    - sympathetic (thoracolumbar) divisions.
      - Preganglionic neurons in the sympathetic system
        
        located in the spinal cord (T1-L3)
        
        synapse in chain ganglia adjacent to the spine and collateral ganglia along major abdominal blood vessels.

General

Specific Nerves (Alphabetical)