vision Flashcards
a lesion to where would cause total loss of vision in the right eye?
right optic nerve
a lesion to where would cause bilateral hemianopia?
midline chiasmal lesion
a lesion where would cause a left homonymous hemianopia?
right optic tract
a lesion where would cause a right homonymous superior quadrantanopia?
left lower optic radiation in meyer’s loop in the temporal lobe
a lesion where would cause a left homonymous inferior quadrantanopia?
right upper optic radiation in the parietal lobe
describe the innervation of the extra occular muscles.
superior, inferior, medial rectus and inferior oblique, levator palpebrae superioris= occulomotor never
lateral rectus = trochlear nerve
superior oblique = abducens
what eye movement does superior retcus do?
elevation
what eye movement does inferior rectus do?
depression
what eye movement does medial rectus do?
adducts
what eye movement does lateral rectus do
abducts
what eye movements does superior oblique do?
depresses, abducts and medial rotation (intorsion)
what eye movement does inferior oblique do?
elevates, adducts and lateral rotation (extorsion)
what are the layers of the retina?
- ganglion cells
- inner plexiformlayer
- inner nuclear layer
- outer plexiform layer
- outer nuclear layer
- photoreceptors (rods and cones)
