Olfactory & Visual Systems Flashcards
Do olfactory fibers cross the midline?
yes, some do.
anterior comissure
What are the areas of olfactory bulb projections?
primary olfactory tract cortex: (near lateral olfactory tract (piriform cortex, cortex covering amygdala, small part of parahippocampal gyrus)
amygdala
Where does refraction happen in the eye?
Mostly happens at the air-water interface at corneal surface
About 1/3 happens in the lens
What is the role of the iris?
affects brightness and quality of image focused on retina
What muscles control pupil size?
pupillary sphincter (stronger than dilator) pupillary dilator
What is in the fovea of the eye? What is NOT there?
The fovea contains elongated cones and no rods
T/F: There are no capillaries above the fovea.
True
What is the function of the fovea?
specialized for vision of highest acuity
Where do most of the optic fibers travel to?
most travel to lateral geniculate nucleus
thalamic relay for vision
What visual field does the retrolenticular limb of the internal capsule correspond with?
Inferior visual field
What visual field does the sublenticular part of the internal capsule correspond with?
Superior visual field
Other than LGN, what are other destinations for visual information?
Superior Colliculus (optic tract fiber bypasses LGN to superior colliculus & pretectal area)
Hypothalamus
Suprachiasmatic nucleus get direct input
From the primary visual cortex, where does the visual information go?
to specialized parts of extrastriate cortex
Parvocellular layers of the visual cortex are responsible for what parts of vision? What part of the cortex do they go to?
color, form
ventral striate cortex
Magnocellular layers of the visual cortex are responsibile for what parts of vision? What parts of the cortex do the to go?
location, movement
dorsal striate cortex
