slide set 4.1

  1. organization of the nervous system based on anatomical location
    • Central nervous system
    • comprised of : brain and spinal cord
    • roles : integrates sensory information, evaluates it and initiates an outgoing response

    • Peripheral nervous system
    • Comprised of : nerves that lie in outer regions of the nervous system
    • Cranial nerves - originate form the brain
    • Spinal nerves - originate from the spinal cord
  2. organization of the nervous system
    somatic nervous system (SNS) vs automatic nervous system (ANS)
  3. Somatic nervous system (SNS)
    • 1. Somatic motor division
    • carries information to the somatic effectors (skeletal muscles)

    • 2. Somatic sensory division
    • carries feedback information to the somatic integration centres in the CNS
  4. Autonomic nervous system (ANS)
    • without voluntary control
    • afferent divison (incoming) messages from visceral receptors

    efferent division (outgoing) of ANS= carries information to the visceral effectors (smooth an cardiac muscles and glands)
  5. ANS - Efferent (outgoing) pathways
    • 1. Sympathetic pathway
    • prepares the body to deal with immediate threats to the internal environment
    • produces "fight or flight" response

    • 2. Parasympathetic pathway
    • coordinates the body resting activities
    • sometimes called the "rest and repair" division
    • ex. gastric phase
  6. Gastric phase - ex. of parasympathetic reflex
    the distention of the
Card Set
slide set 4.1