Olfactory and Taste Flashcards
what bone is cribriform plate part of?
ethmoid
loss of ability to smell
anosmiac
only part of olfactory neuron that can respond to odorant
cilia
what makes up olfactory stria?
mitral and tufted cell
this leads to contralateral olfactory bulb
medial olfactory stria
what receives primary olfactory input?
amygdala, periamygdaloid complex, piriform cortex, entorhinal cortex
what part of thalamus would olfactory project to (secondarily)?
mediodorsal nucleus thalamus
where are taste buds primarily located?
circumvallate papillae
how many circumvallate papillae do we have?
8/12/2015
what makes up taste cortex?
operculum and insular cortex
germ layer for olfactory epithelium
ectoderm
this gave rise to olfactory epithelium, glial cells olfactory nerves and bulb
olfactory placode
type of epithelium olfactory is
pseudostratified columnar
beneath epithelium, secrete mucus in which odorants are dissolved
olfactory glands of Bowman
dendrite of bipolar olfactory neuron ends in epithelium as this (bulbous enlargement)…has cilia with odorant receptors
olfactory vesicle
these unmyelinated axons are bundled on each side of olfactory neuron
olfactory fila
where do olfactory fila terminate?
olfactory glomeruli (go thru cribriform plate to here from epithelium)
life span for healthy olfactory cells
30-60 days
these act as stem cells that give rise to receptor cells in olfactory epithelium
basal cells
layers of olfactory bulb from superficial to deep
nerve fiber, glomerular, external plexiform, mitral cell, granule cell
what makes up nerve fiber layer of olfactory bulb? where do these terminate?
afferent from olfactory epithelium; glomeruli
makes up glomeruli…olfactory receptor axons synapse on these dendrites
mitral and tufted cells
mitral and tufted cells have reciprocal connections with these cells
periglomerular cells
modulatory input to olfactory bulb glomerular layer
locus ceruleus, raphe nuclei, anterior olfactory nucleus, diagonal band of Broca