mod 10 Flashcards
which nerves are most anterior
olfactory 1 and optic 2
which cranial nerves carry sensory info
Olfactory 1, optic 2, vestibulocochlear 8
which cranial nerves carry motor info
oculomotor 3, trochlear 4, abducens 6, spinal accessory 11, hypoglossal 12
which cranial nerves carry both
trigeminal 5, facial 7, glossopharyngeal 9, vagus 10
structures of the external ear
auricle and external auditory meatus
what is found in the middle ear
3 ear ossicle (malleus, incus, stapes), pharyngotympanic tube, oval window
structures of the inner ear
bony labyrinth (semicircular canals, vestibule, and cochlea) and membranous labyrinth
cochlea function
hearing
vestibule function
equilibrium (acceleration)
semicircular canal function
equilibrium (rotation)
what are the structures of lacrimal apparatus
lacrimal glands, lacrimal sac, and nasolacrimal duct
3 layers of the eyeball
fibrous layer, vascular layer, and retinal layer
what is found in the fibrous layer
sclera and cornea
what is found in retina
melanocytes and rods and cones
functions of the photoreceptor cells
rods work best in dim light and cones are used for bright light and color vision
macula lutea
area of concentrated cone cells at posterior pole
optic disc
blind spot in eye area where optic nerve attaches
fovea centralis
area of only cone cells at center of macula lutea
how do you focus on far and near things
accommodation or when the lens becomes more/less spherical
what is found in vascular layer
choroid, ciliary body muscles, and the iris
what makes pupils larger or smaller
sphincter pupillae- makes it smaller dilator pupillae - makes it larger
