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visual pathway-exam3

Neuroanatomy - Visual pathways exam 3

Retina 3 neuron chain
3 neuron chain photoreceptors, bilpolar cells, ganglion cells (axons form optic nerve)
Light reflex fibers project bilaterally from accomodation center in superior colliculus to Edinger-Westphal nucleus to ciliary ganglion
Argyll Robertson Pupils usually the result of tertiary syphilis (accompanied by tabes dorsalis)
Argyll Robertson Pupils pupils are small & not reactive to light
Arryll Robertson Pupils accomodation reflex intact
blindness in one eye lesion in optic n.
loss of peripheral vision bitemporal hemianopsia
loss of peripheral vision lesion in optic chiasm
loss of nasal visual field nasal hemianopsia
loss of nasal visual field lesion on side of chiasm
loss of R or L visual field homonymous hemianopsia
Loss of R or L visual field lesoin in optic tract or cortex
Loss of quadrant (both eyes) superior quadrant anopsia
loss of quadrant (both eyes) lesion in Meyer's loop
Created by: JYarger