Olfaction & Gustation - Kraatz Flashcards
What is the pathway of olfaction?
Odorants → primary receptor neurons → olfactory bulb → secondary neurons → pyriform cortex
What do Bowman’s glands do?
Produce mucus layer
What are mitral cells?
Within glomeruli, receptor axons contact apical dendrites of mitral cells; cause odorant sensitivity
What are tufted cells?
Cells that receive synapses from primary afferent neurons and send signals along olfactory tract
What do granular cells do?
Contribute to lateral inhibition (no axons, just dendrites)
What is the pyriform cortex responsible for?
Odor discrimination
What is the amygdala responsible for?
Emotional and memory associations (including those related to odor)
What is the entorhinal cortex responsible for?
Odor memory and navigation
Are the stria (medial and lateral olfactory) responsible for containing afferent or efferent fibers?
Efferent
Where are fungiform papillae located?
Anterior 2/3 of tongue
Where are circumvallate papillae located?
Chevron at rear of tongue
Where are foliate papillae located?
Posterior lateral tongue
What nerves transmit primar special sensory afferent signals for the gustation system and to where do their fibers transmit?
CN VII Facial - geniculate ganglion
CN IX Glossopharyngeal - inferior ganglion (petrous)
CN X Vagus - inferior ganglion (nodose)
Where do secondary axons synapse after ascending along the gustatory nucleus?
VPM Thalamus
What type of innervation does CN V Trigeminal provide for the tongue?
General sensation on the anterior 2/3 of the tongue (NOT TASTE)
