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44 terms

Olfactory System/Taste

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3-10 thousand
How many different smells can humans distinguish?
turbinates
cartilagenous growths on the lateral nasal wall that stir up the air
3
How many turbinates are there?
respiratory epithelium
ciliated epithelial cells that lines the nasal cavity and propels mucous along the surface
olfactory epithelium, below the cribriform plate
olfactory receptor cells surrounded by supporting cells. Where is it found?
depolarize them
What do odorants do to receptor cell cilia?
immature basal cells
What are constantly differentiated to become new olfactory receptor cells?
epithelium
Where is the cell bodies of the olfactory receptor cells located?
dissolve odor gases
What is the function of Bowman's olfactory glands?
trigeminal
Which nerve innervates nasal mucosa?
trigeminal
Which nerve is responsible for "painful" smells such as ammonia?
olfactory bulb
The __________ is the rostral expansion of the olfactory tract
cribriform plate
What does the olfactory nerve pass through to reach the olfactory bulb?
mitral cell dendrites
Olfactory axons converge on what?
mitral cell axons
What carries information out of the olfactory bulb through the olfactory tract?
corticofugal fibers
What provides feedback to suppress smell?
periglomerular cells and granule cells
What types of cells modulate and control the transmission of olfactory impulses?
mitral cells
What makes up the olfactory tract?
ipsilateral bulb and contralateral bulb via the anterior commissure
Projections from the anterior olfactory nucleus go where?
primary olfactory cortex
Where does the lateral olfactory tract project to?
piriform cortex and periamygdaloid cortex
What are the two cortices of the primary olfactory cortex?
olfactory tubercle, entorhinal cortex, rostral uncus, corticomedial amygdala
What structures make up the secondary olfactory cortex?
CN 7,9,10
What CNs contribute to the sensation of taste?
taste buds
What holds receptors on the tongue?
taste and olfaction
perception of taste combines what two sensations?
40-60
How many taste receptor cells are found in a taste bud?
bitterness, sourness, saltiness, sweetness
What are the 4 basic elements of taste?
chorda tympani, facial
The Anterior 2/3 of the tounge is innervated by the _________ branch of the _________ nerve.
geniculate ganglion
Cell bodies for the chorda tympani branch of the facial nerve are found where?
all 4
Which elements of taste can the facial nerve carry?
glossopharyngeal
Which nerve innervates the posterior 1/3 of the toungue?
sweet and bitter
Which elements of taste can the glossopharyngeal nerve carry?
inferior ganglion
the cell bodies for the glossopharyngeal nerve are found where?
vagus
Which nerve innervates the epiglottis and esophagus?
inferior ganglion
The cell bodies for the vagus nerve are found where?
bitter
Which elements of taste can the epiglottis sense?
ipsilateral solitary tract to the rostral solitary nucleus
Taste sensation travels along what and terminates where?
VPM
Where do solitariothalamic neurons terminate in the thalamus?
inferior frontal gyrus and adjacent rostral insula
Where is the cortical taste area located?
43
What is the brodman's area for the cortical taste area?
paralysis of face muscles without loss of taste
What happens with a lesion of the facial nerve distal to the chorda tympani?
no
can you feel food with taste buds?
no
can you feel pain with your taste buds?
trigeminal
What nerve is responsible for tounge sensation?