Special senses Flashcards
projections from the tongue where taste buds are embedded
taste papillae
cylindrical, largest, least in number, bitter receptors
circum vallate
mushroom shaped, most numerous taste receptors, tip of tongue
fungiform
posterior roof/mouth lateral margins
foliate
threadlike sensitive to touch (no taste)
filiform
anterior 2/3 of tongue nerve/taste
cn7
sweet, sour, salty
cn7 pathway
cn7 –> chorda tympani –> pterygopalatine –> solitary tract and nucleus
posterior 1/3 of tongue nerve/taste
cn9
bitter
epiglottis and larynx nerve/taste
cn10
bitter
what is the embryonic thyroid diverticulum (dorsal depression of tongue) called
foramen caccum
limbic area that contains granular, mitral and tufted cells and aglomerulus
olfactory bulb
cn1 pathway
cn1–> cribiform plate of ethmoid –> lateral olfactory stria –> uncus or medial olfactory stria –> subcallosal gyrus
what epithelium is the upper surface of superior concha - main chemo receptor
pseudostratified columnar epithelium
what does the retina develop from
ectoderm
where is sclera derived from
dura
what do retinal cells include
amacrine, bipolar, ganglion, horizontal and pigments, rods and cones (rhodopsin)
what is the nerve supply of vision
retina optic nerve optic chiasm optic tract (connects superior colliculus) lateral geniculate nucleus optic radiations calcarine tissue of the occipital lobe
structures in the retina
fovea centralis
optic disc
ciliary muscles
fovea centralis location and purpose
center of macula lutea
greatest acuity
only has cones
blind spot where optic nerve and vessels attach to the eye
optic disc
what do the ciliary muscles do
controls lens shape
auditory nerve supply
spiral ganglion cochlear nerve ventral then dorsal cochlear nucleus lateral lemniscus inferior colliculus medial geniculate temporal lobe "LIM"
sound travels
ext. auditory meatus tympanic membrane handle of malleus head of malleus incus stapes oval window cochlea round window
what do semicircular canals detect
angular acceleration and deceleration