PSYCH 202 Lecture Notes - Lecture 39: Thalamus, Sensory Cortex, Olfactory Bulb
22 Mar 2018
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Document Summary
Do humans produce pheromones: yes, we don"t have a functional organ dedicated just to detecting pheromones. Sensation: detection of our environment by our bodies and brains. Perception: the subjective experience of our environment. Sensation: critical early step for all sensory processing, transduction, translation of an external stimulus into a neural signal, touch, mechanical pressure, taste & smell, chemical molecules. Transduction: of what: we can see uv light if we"re looking through a filter, other animals are able to see uv light. Specialized receptors: rods & cones (photoreceptors - sight, receptors of photons, hair cells (sound, touch receptors, more than one sensory receptor cell. Sight: rhodopsin, photopigment on rods, proteins that detect photons and change, which initiates a cellular signal, kind of like proteins responding to neurotransmitters and ligands. Sensation to perception: most sensory information goes through thalamus except for smell (goes from olfactory bulb to olfactory cortex, thalamus routes sensory info to sensory cortex, vision, audition, taste, not smell.
