Special Senses 9% Flashcards
special senses are
gustation, olfaction, vision, auditory
projections from tongue where taste buds are embedded
taste papillae
cylindrical, largest, least in number, bitter, 8-12 V shaped form, anterior to sulcus terminalis
circum vallate papillae
mushroom shaped, most numerous taste receptors, tip tongue
fungiform
posterior roof/mouth lateral margins
foliate
thread like, sensitive to touch (no taste)
filiform
(sweet, sour, salty) CN VII to chorda tympani to pterygopalatine to solitary tract and nucleus
anterior 2/3 of tongue
bitter CN IX
posterior 1/3 tongue
CN X bitter
epiglottis and larynx
embryonic thyroid diverticulum (dorsal depression of tongue)
foramen caecum
limbic area, contains granular, mitral and tufted cells and a glomerulus
olfactory bulb
olfaction nerver supply: CN? to cribriform plate of ethmoid to ___ to ___/medial olfactory stria to subcallosal gyrus
I, lateral olfactory stria, UNCUS
upper surface of superior concha, main chemoreceptor
pseudostratified columnar epithelium
retina develops from ? sclera derived from ?
ectoderm, dura
retinal cells include:
amacrine, bipolar, ganglion, horizontal and pigments (rods and cones)
vision n. supply: retina TO optic nerve TO ___TO optic tract (connects superior colliculus) TO ___ TO optic radiations TO calcarine fissure of the __lobe
optic chiasm, lateral geniculate nucleus, occipital
center of macula lutea, provides greatest acuity, only CONES
fovea centralis
blind spot, where optic nerve and vessels attach to the eye
optic disc
control lens shape
ciliary muscle
auditory nerve pathway: ___ TO cochlear n. TO ventral then dorsal cochlear nucleus TO __ TO inferior colliculus TO ___ TO temporal lobe “LIM”
spiral ganglion, lateral lemincus, medial geniculate
sound travel: external auditory meatus TO tympanic membrane (ear drum) TO handle of malleus TO head of malleus TO ___TO ___ TO ___ TO cochlea TO ___
incus, stapes, oval window, round window (MISOCR)
angular acceleration and deceleration
semicircular canals
linear accelartion
utricle and saccule
intraocular pressure
glaucoma