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

Summary of Nerves and Muscles of Upper Extremity
Cervical and Thoracic Nerve Roots and Function

Specific Nerves (Alphabetical)