PSYCH 2E03 Lecture Notes - Lecture 10: Orbitofrontal Cortex, Neural Coding, Somatosensory System
10 Oct 2016
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Document Summary
2 chemical senses: olfactory system (scent, smell): detects airborne chemicals, gustatory system (taste): detect chemicals dissolved in saliva. These 2 differ from other senses in several ways: very complex, don"t understand as well. Both affect our emotions more strongly than other sensory modalities. Food selection: being able to taste quality of things we are about to ingest, good for survival. Large role in communication (in animals, use pheromones) Chemical senses have a strong connection with our emotional system. Taste qualities: 5 basic taste qualities (salty, sweet, bitter, sour, umami (savory)) Have these bumps all over your tongue (papilla: papilla: mound or projection of tissue. V shape in back, less abundant but localized. Vast majority of taste buds are embedded within papillae grooves: also present on roof and back of mouth, direct contact with taste buds. Taste cell within a taste bud, 50-150 specialized receptor cells within each taste bud: transduce chemical signals, behave like neurons, gustatory afferents.
