Neuro 16-17.txt

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Neuro 16-17.txt
2011-03-28 21:32:37
Neuro test tricks

Neuro test 2 tricks
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  1. What A supplies the LGN?
    Thalamogeniculate (off of posterior cerebral)
  2. What A supplies the medial optic radiations and the visual cortex?
    Calcarine A (off of posterior cerebral)
  3. What A supplies the lateral optic radiations and Meyer's loops?
    MCA branches
  4. What A provides the Optic tract?
    Anterior Choroidal (off of IC)
  5. What A provides the optic chiasm?
    Branches off of anterior communicating branch of ACA
  6. What A provides CNII?
    Ophthalmic branches (IC)
  7. What A supples the retina and and distal CN II?
    Central A of the retina (Opthalmic, IC)
  8. What A supply photoreceptors?
    Choroid (off of ophthalmic, IC)
  9. What is Anopia?
    Visual field defect
  10. What is Hemianopia?
    loss of one half of visual field
  11. What is Quadrantanopia?
    loss of a quadrant of visual field
  12. What is Homonymous deficit?
    Deficit in visual field in same part of eye for both eyes
  13. What is Heteronymous?
    Deficit in visual field in different part of eye for both eyes
  14. What fibers are ispilateral or contralateral? Temporal (Lateral) or Medial (Nasal)
    • Ipsilateral: Temporal (Lateral)
    • Contralateral: Nasal (Medial)
  15. Of the LGN layers, which are ipsilateral or contralateral?
    • Ipsilateral: 2, 3, 5
    • Contralateral:1, 4, 6
  16. Which cells can react in more than one location? Granule, simple, or complex
  17. Which cells are center-surround cells? Granule, Simple, or Complex
  18. What type of potentials fire in bipolar and ganglion cells?
    • Bipolar: graded potentials
    • Ganglion: APs
  19. What are the four types of center-surround cells?
    • 1) Bipolar
    • 2) Ganglion
    • 3) LGN
    • 4) Granular
  20. Which cells make up CNII?
    Ganglion cells (axons)
  21. What is the Stria of Gennari?
    Extra band of perpendicular cells in layer 4 of visual cortex. Only found here!!
  22. What gyrus does the Macula Densa synapse?
    Posterior portion of Cuneus gyrus
  23. What opens and closes Na gated channels in photoreceptors?
    • Open = cGMP
    • Close = 5' cGMP
  24. What type of nerve fibers are housed in the Edinger-Westphal nucleus?
    Preganglionic parasympathetic
  25. Where do the Pregang. Parasym. of EW synapse to become Postgang. Parasym?
    Ciliary ganglion
  26. What are the three steps in the accomodation reflex for an object moving closer?
    • 1) Medial rectus muscle pulls eyes together
    • 2) Pupillary sphinctor muscle conistricts pupil
    • 3) Ciliary body contracts = relaxed suspensory ligaments = round lens
  27. What is Amblyopia?
    abnormal visual stimulation during childhood
  28. What is strabismus?
    Straying of one or both eyes off of focus
  29. What are congenital cataracts?
    Cloudy lens
  30. What is visual agnosia? Where located?
    • inability to recognize a viewed object
    • Brodmann areas18-19 (dorsal group)
  31. What is Prosopagnosia? Where?
    • Inability to distinguish one face from another face
    • temporal lobe