spinal cord, meningies, csf

  1. funtions of the spinal cord
    • highway for messages between brain and body
    • coordinates simple protective reflexes without having to involve the brain
  2. 4 areas of the spinal cord
    cervical thorasic lumbar and sacralccoygeal
  3. cervical enlargement
    houses nerve that inervate the upper limbs
  4. cervical area houses
    cervical segments, and the cervical englangement
  5. lumbar enlargement
    gives rise to nerves which inervate lower limbs
  6. thoracic area houses
    thoracic segments, lumbar segments, and lumbar enlargement
  7. lumbar area
    sacralccoxygeal segment
  8. layer of the spinal cord
    • Connective tissue - meningies
    • Nervous tissue - grey and white matter
    • epedymal cells, central canal
  9. reflexes are
    fast and used to protect us ivoluntarily
  10. 5 components of a reflex are
    receptor, sensory neuron, association neuron, motor neuron, effector
  11. somatic reflex
    • effector is skeletal muscle
    • motor neuron located in anterior horn
  12. autonomic reflex
    • effector is a gland, cardiac or smooth muscle
    • motor neuron is located in the lateral horn
  13. dura mater
    protects the brain from dispacement outter layer
  14. arachnoid
    protect surround and support the spinal cord
  15. pia mater
    provides blood supply to exterior of organs
  16. 3 spaces
    • epidural space
    • subdural space
    • subarachnoid space: csf flows around the brain and spinal cord
  17. csf composition
    glucose amino acids, salts and oxygen
  18. csf is made in
    inside the ventricle by chroid plexi as filtrate of blood and from epedymal cells lining central canal and ventrcles
  19. function of csf
    cushuon nourish and remove waste absorbed by arachnoid villi
  20. csf flows in
    chroid plexi in lat. vent. - interventricular foramen - choroid plexis in 3rd vent. - cerebral aqueduct - choroid plexi in 4th vent - median aperture or lateral aperture- subarachnoid space
  21. csf flows out
    subarachnoid space - arachnoid villus - blood super sagital sinus - drains to venos system
  22. posterior horn
    house cell bodies and axons of interneurons
  23. anterior horn
    contain motor cell bodies
  24. lateral horn
    house the autonomic motor cell bodies
  25. posterior root
    convey sensations to CNS
  26. anterior root
    convey impulses to muscles
  27. posterior root ganglion
    provides sensory info from body to the spinal cord and brain
  28. posterior white column
    houses bundles of axons with a common origin.
  29. anterior white collumn
    houses bundles of axons with common origin
  30. central canal
    houses ependimal cells and cerebrospinal fluid
  31. conus medullaris
    gives rise to nerves that intervate pelvic and reproductive organs
  32. cauda equina
    • innervate lower limbs and pelvic prgans
    • motor and sensory
  33. filum terminale
    attaches the conus medullaris to the coccyx
  34. spinal nerves
    responsible for controlling body fuction
  35. dura mater
    covers and protects spinal cord
  36. pia matter
    supplys oxygen and nutrients to spinal cord
  37. arachnoid
    provide blood supply to pia matter
Card Set
spinal cord, meningies, csf