335 5.3 Neuroanatomy

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shanamd2010
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132202
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335 5.3 Neuroanatomy
Updated:
2012-02-01 11:35:05
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neuroanatomy
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CDO 335
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  1. I Olfactory Nerve
    component
    function
    consists of
    damage
    • only a special sensory (afferent) component
    • function = sense of smell or olfaction
    • olfactory system consists of the olfactory epithelium, bulbs and tracts along with olfactory areas of the brain collectively known as the rhinencephalon
    • most common damage is ansomia (loss of sense of smell and taste)
  2. II Optic Nerve
    component
    function 3
    • special sensory (afferent) component only
    • function- conveys visual info from the retina
    • visual info enters eye in form of photons of light
    • convereted to electrical signals in the retina
    • signals carried via optic nerves, chiasm, and tract to the lateral geniculate nucleus of each thalamus
    • then to the visual centers of the brain for interpretation
    • diagram p. 597
  3. III Oculomotor
    supplies
    function 2
    • supplies motor component
    • moves muscles of the eyelids
    • movement of eye for visual tracking or fixation on an object
  4. IV Trochlear Nerve
    component
    function
    • motor component
    • eye movements- specifically turns eye down and outward
  5. V Trigeminal
    components
    3 branches
    • both sensory and motor components
    • Opthalmic
    • Maxillary
    • Mandibular
  6. Opthalmic brach of V Trigeminal
    • sensory only
    • info from skin on upper face, forehead, scalp, cornea, iris, upper eyelid
  7. Maxillary brach of V Trigeminal
    • sensory info only
    • lower eyelid, skin on side of nose, upper jaw, lip, mucosal lining of buccal and nasal cavities, maxillary sinuses, and nasopharynx
  8. Mandibular brach of V Trigeminal
    • sensory info from mandible, lower teeth, gums and lip, EAM, auricle, are of temporal lobe, anterior 2/3 of tongue and floor of mouth
    • motor innervations are the muscles of mastication elevates hyoid, tenses palate
  9. buccal cavity
    cheek
  10. lacrinal gland
    nasal cavity
  11. VI Abducens
    • motor component only
    • lateral eye movement
  12. VII Facial
    • Both sensory and motor components
    • motor innervation to facial muscles
    • elevates hyoid bone
    • sense of taste to anterior 2/3 of the tongue, hard and soft palates
    • salivation
  13. VII Vestibulocochlear
    • motor and sensory components
    • sense of hearing
    • sense of balance
  14. IX Glossopharyngeal
    • both motor and sensory components
    • pharyngeal movements
    • salivation
    • sensation for swallow reflex
    • sense of taste posterior 1/3 of tongue and portion of the soft palate
  15. X Vagus
    components
    movements 3
    function
    • both motor and sensory information
    • laryngeal movements,pharyngeal movements,palatal elevation
    • sense of taste
  16. X Vagus
    3 branches
    • pharyngeal branch
    • superior laryngeal branch
    • recurrent laryngeal branch
  17. Pharyngeal branch of X Vagus
    • innervates soft palate
    • hypernasality if damaged
  18. superior laryngeal branch of X Vagus
    • cricothyroid muscles
    • pitch issues if damaged
  19. recurrent laryngeal branch
    • muscles of abduction and adduction
    • breathy voie if damaged
  20. XI Accessory
    components
    function 4
    workks in conjunction with
    • motor components
    • head turn, shoulder shrug
    • helps elevate the palate
    • helps laryngeal movements
    • innervates pharyngeal muscles
    • works in conjunction with the Vagus nerve
  21. XII Hypoglossal
    components
    function
    • motor components
    • movements of tongue
    • elevates hyoid bone

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