Olfactory and Gustatory Systems Flashcards
What is the effect of bilateral temporal lobe lesions?
Kluver-Bucy syndrome - amnesia, hypersexuality, placidity, visual agnosia
What is the effect of mammillary nuclei and anterior thalami degeneration?
Korsakoff’s syndrome - amnesia
What is the role of place cells?
Active when body in certain place - forms map
What is the role of grid cells?
Active when body in regularly-spaced positions - allow perception of movement direction and speed
What is the role of the supporting cells on the tongue?
Secrete substances into tastebud lumen
What is the role of sensory receptor cells on the tongue?
Contain sites of sensory transduction
What is the role of basal cells on the tongue?
Differentiate into new receptor cells
What is the role of type I taste cells?
Detect salty
What is the role of type II taste cells?
Detect sweet, umami, bitter
What is the role of type III taste cells?
Detect sour
What is the role of the mucus layer covering the olfactory epithelium?
Contains odorant-binding proteins - attract volatile molecules out of favoured airborne phase to cilia
What is the role of orthonasal olfaction?
Samples environment
What is the role of retronasal olfaction?
Samples mouth contents
What is the role of olfactory ensheathing cells?
Allow olfactory sensory neurons (OSNs) to grow into CNS
What is the role of the piriform cortex?
Conscious odour appreciation
