Flashcards in neuro visual system and cerebral odd spots Deck (12):
what's the macula of the fovea centralis
area with dense cone concentration where we have the best vision
how are receptors in the peripheral retina specialized?
w/ rods for black and white,
figuring out where something is
what make up the optic nerve?
axons of ganglion cells
what make up the layers of the retina?
rods and cones
what causes the blind spot of the eye?
images of our temporal visual field are relayed in what retinal field?
temporal visual corresponds with nasal retinal
likewise, nasal visual field corresponds with temporal retinal field
lesion of the optic nerve results in...
ipsilateral blindness of the eye on the side of the lesion
axons of the ______ retinal field cross in the ______
nasal retinal field
what happens if the pituitary gland expands and the center of the optic chiasm becomes impaired?
bi-temporal loss of vision due to impairment of both nasal retinal fields
how would vision be affected if the internal carotid a. has an aneurysm and impairs the lateral part of the optic chiasm?
you would lose temporal retinal field (nasal visual field for the eye on the side of the lesion
what happens if there's a lateral tract, primary visual cortex or lateral geniculate body lesion?
you would lose sight for the field opposide the side of the lesion
ie. if you have a lesion of the L optic tract, you'd lose the L temporal retinal field and R nasal retinal field causing you to lose your right field of vision.