8th grade ch. 6 sec. 2 divisions of the nervous system

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8th grade ch. 6 sec. 2 divisions of the nervous system

  1. 1. Sec. 2 Divisions of the Nervous System
  2. 2. nervous system central nervous system peripheral nervous system
  3. 3. central nervous system <ul><li>control center of body </li></ul><ul><li>incl: </li></ul><ul><li>brain </li></ul><ul><li>spinal cord </li></ul>
  4. 4. Brain & Spinal Cord central nervous system
  5. 5. brain <ul><li>contains about 100 billion neurons </li></ul>
  6. 6. 3 main regions of brain cerebrum cerebellum brain stem
  7. 8. cerebrum <ul><li>largest part of brain </li></ul><ul><li>interprets input from senses </li></ul><ul><li>controls movement of skeletal muscles </li></ul><ul><li>divided into right half & left half </li></ul><ul><ul><li>right half  creativity & artistic ability </li></ul></ul><ul><ul><li>left half  math skills, speech, writing, logical thinking </li></ul></ul>
  8. 9. cerebrum
  9. 10. cerebellum <ul><li>muscular coordination </li></ul><ul><li>balance </li></ul>
  10. 11. brainstem <ul><li>controls involuntary actions </li></ul><ul><ul><li>breathing, heartbeat </li></ul></ul>
  11. 12. peripheral nervous system <ul><li>all the nerves located outside of central nervous system </li></ul><ul><li>divided into 2 groups: </li></ul><ul><li>somatic system- controls voluntary actions </li></ul><ul><li>auto nomic system- controls involuntary actions </li></ul>
  12. 13. reflex <ul><li>automatic response that occurs very rapidly & without conscious control </li></ul>
  13. 15. nervous system injuries <ul><li>concussion = bruiselike injury of brain </li></ul><ul><li>spinal cord injury = spinal cord is cut or crushed </li></ul>
  14. 16. Ouch !!!!!
  15. 17. It may be a concussion????
  16. 18. Spinal cord injury
  17. 19. <ul><li>Christopher Reeve as Superman </li></ul>
  18. 21. Christopher Reeve The Man of Steel
  19. 22. Christopher Reeve
  20. 23. Spinal cord injury
  21. 25. Quadripalegic

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