CNS Appendix C (Cranial Nerves)

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CNS Appendix C (Cranial Nerves)
2014-07-21 22:27:24
Cranial Nerves CranialNerves

Info on cranial nerve pairs
Show Answers:

  1. Name cranial nerve one (I).
    Olfactory nerve pair
  2. Cranial nerve pair one, two, and eight are classified as what?
    Special Sense Nerves ONLY
  3. Function of cranial nerve one (I).
    • carries olfactory input to brain via olfactory bulb and tracts
    • input is interpreted in the uncus of temporal lobes
  4. name cranial nerve two
    Optic nerve pair
  5. What is function of cranial nerve pair two (II)?
    Carries millions of nerve fibers from retinas to brain.
  6. How does info passed along Optic Nerve to the brain?
    Along the optic nerve, chiasma and tracts.
  7. Where are the sight interpretation centers found in the brain?
    Calcarine Sulcus (Occipital Lobe)
  8. Name cranial nerve three (III).
    Oculomotor Nerve Pair
  9. What does cranial nerve III control?
    • Four of the six external eye muscles (movement)
    • Parasympathetic control over some smooth muscles on eyes interior (monitors light and distance)
  10. Name cranial nerve four (IV).
    Trochlear Nerve Pair
  11. Function of the Trochlear Nerve?
    Allows us to move each eyeball.  (only one muscle each eye)
  12. Name cranial nerve five (V).
    Trigeminal Nerve Pair
  13. Features of the Trigeminal Nerve Pair?
    • Largest cranial nerve
    • Originates on lateral Pons
    • Divides into three parts
  14. What are the three subdivisions of the Trigeminal Nerve?
    • Opthalmic
    • Maxillary
    • Mandibular
  15. Function of the Trigeminal Nerve Pair?
    • Chew food
    • Sensations of pressure, pain, temperature from face
    • (EX. tooth ache, lip sensitivity)
  16. Name cranial nerve six (VI).
    Abducens Nerve Pair
  17. Function of the Abducens Nerve?
    Allows us to move each eyeball. (only one muscle each eye)
  18. What cranial nerves go to the eye area?  From the eye area?
    • From Eye:
    • Oculomotor (III)
    • Trochlear (IV)
    • Abducens (VI)

    • To Eye:
    • Optic (II)
  19. Name cranial nerve seven (VII).
    Facial Nerve Pair
  20. Function of Facial Nerve Pair?
    • Motor Nerve:
    • Facial expression
    • Produces tears (lacrimal gland)

    • Sensory Nerve:
    • Taste from anterior tongue
  21. What are the great sensory and motor nerves of the face?
    • Trigeminal (V)
    • Facial (VII)
  22. Name cranial nerve eight (VIII).
    Vestibulocochlear Nerve Pair
  23. Features of the Vestibulocochlear Nerve Pair?
    • Vestibule and cochlea of ear are involved.
    • Final interpretation of hearing is in superior temporal gyrus of temporal lobe.
  24. Functions of Vestibulocochlear Nerve Pair?
    • Hearing (aka auditory nerve)
    • Equilibrium info from inner ear
  25. Name cranial nerve (IX).
    Glossopharyngeal Nerve Pair
  26. Functions of the Glossopharyngeal Nerve Pair?
    • Motor and Sensory innervation to the pharynx tissues and back of tongue
    • Parasympathetic control over largest salivary gland (parotids)
  27. Name cranial nerve (X).
    Vagus Nerve Pair
  28. Notable Feature of the Vagus Nerve Pair?
    • Longest cranial nerve pair
    • 80% of fibers are Afferent
    • Major visceral component is parasympathetic
  29. Functions of Vagus Nerve?
    • Innervates thorax and abdomen structures
    • (Ex. voicebox, heart, lungs, intestines, stomach)
  30. Name cranial nerve eleven(XI)
    Spinal Accessory Nerve
  31. Functions of Spinal Accessory nerve (XI).
    • Innervates two famous muscles of the neck:
    • Sternocleidomastiod
    • Trapezius
  32. Name Cranial Nerve twelve(XII)
    Hypoglossal Nerve Pair
  33. Functions of the Hypoglossal Nerve.
    Controls all of the significant muscles that help move tongue.
  34. List the Afferent(sensory) nerves.
    • Olfactory nerve (I)
    • Optic nerve (II)
    • Vestibulocochlear nerve (VIII)
  35. List Efferent(motor) nerves.
    3, 4, 6, 11, 12
  36. List the nerves that are mixed (afferent and efferent)
    5, 7, 9, 10
  37. Features of Spinal Accessory Nerve (XI).
    • Motor nerve
    • Comes partly from M.O & partly from spinal cords upper cervical (C1-C5)
    • Some fibers join w/Vagus Nerve for distribution
  38. Mnemonic to remember order of cranial nerves I-XII.
    Oh, oh, oh, to touch and feel very good velvet. Such heaven!
  39. Mnemonic to remember Functions of cranial nerves I-XII.
    Some say marry money but my brother says big brains matter more.