anatomy_nervous_system.txt

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Author:
rmeeks
ID:
66088
Filename:
anatomy_nervous_system.txt
Updated:
2011-02-13 16:20:13
Tags:
Anatomy Physiology
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Description:
Cranial nerves, neuroglia, and neurons
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  1. olfactory
    carries impulses for the sense of smell
  2. optic
    carries impulses for vision
  3. oculomotor
    supplies motor fibers four of the six muscles that direct the eyeball, to the eyelid
  4. trochlear
    supplies motor fibers for one external eye muscle
  5. Trigeminal
    conducts sensory impulses from the skin of the face and mucosa of the nose and mouth
  6. Abducens
    supplies motor fibers to the lateral rectus muscle, which rolls the eye laterally
  7. Facial
    activates muscles of facial expression and the lacrimal and salivary glands
  8. Vestibulocochlear
    vestibular branch transmits impulses for the sense of balance. cochlear branch transmits impulses for the sense of hearing
  9. Glossopharyngeal
    supplies motor fibers to the pharynx (throat) that promote swallowing and saliva production
  10. Vagus
    fibers carry sensory impulses to the pharynx, larynx, and the abdominal and thoracic viscera
  11. Accessory
    mostly motor fibers that activate the sternocleidomastoid and trapezius muscles
  12. Hypoglossal
    motor fibers control tongue movements
  13. Neuroglia
    acts to support neurons
  14. Astrocytes
    help control the chemical environment in the brain by picking up excess ions and recapturing released neurotransmitters. Forms a living barrier between capillaries and neurons
  15. Microglia
    spider like phagocytes that dispose of debris, including dead brain cells and bacteria
  16. Ependymal Cells
    help circulate the cerbrospinal fluid that fills those cavities and forms a protective cushion around the CNS
  17. Oligodendrocytes
    wrap around nerve fibers, which produces fatty insulating coverings and myelin sheath
  18. Afferent (Sensory) Neurons
    transmit impulses form PNS to CNS
  19. Efferent (Motor) Neurons
    transmit impulses from CNS to muscles or glands
  20. Interneurons (association neurons)
    located within CNS and conducts impulses between sensory and motor neurons

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