Basic Division of Nervous System

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Author:
Mon
ID:
87819
Filename:
Basic Division of Nervous System
Updated:
2011-05-26 02:46:13
Tags:
CNS PNS motor afferent efferent
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Description:
basic division of nervous system
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  1. What is sensory input?
    gather information from environment
  2. Integration
    process the information
  3. Motor Output
    stimulate body to respond appropriately
  4. What is the nervous sytem designed to do?
    • sensory input - gather information from environment
    • integration - process it
    • motor output - stimulate body to respond appropriately
  5. What is CNS and PNS?
    CNS - brain & spinal cord (both are protected by bone)

    • PNS - all nerves exiting spinal cord & innervate body
    • * two subdivisions
    • - autonomic NS - sends impulses to control involuntary actions
    • - Somatic NS - sends impulses to control voluntary actions
  6. What is Autonomic NS?
    branch sending impulses controlling involuntary actions
  7. What is Somatic NS?
    branch sending impulses controlling voluntary actions
  8. Afferent Signal, Integration, & efferent signal
    afferent signal - when stimulus is detected by NS, impulse is sent to brain

    integration - brain receives information & proceses it

    efferent signal - When the impulse sends out a response, it is sent to the body
  9. Somatic Motor
    efferent impulses reaching skeletal muscle (voluntary movement)
  10. Branchial Motor
    branch innervating pharyngeal muscles
  11. Visceral motor
    nerves carrying efferent impulses reaching internal organs & regulating involuntary muscle contractions
  12. Somatic Sensory
    afferent impulses originating from non-visceral areas such as skin & muscle
  13. Two types of somatic sensory
    proprioceptive senses - sends sensory information from muscle, ligaments, tendons, & indicate body position

    Special somatic senses - localized receptors such as those of ear & eyes
  14. Proprioceptive senses
    sends sensory information from muscle, ligaments, tendons, & indicate body position
  15. Special somatic senses
    localized receptors such as those of ear & eyes
  16. Visceral sensory
    afferent impulses generated by internal organs (ex. taste buds)

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