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5 Cards in this Set
- Front
- Back
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What are the stages of sensation? |
Reception - stimulus energy is collected by the sense organ. Transduction - stimulus energy is converted by receptor cells into electrochemical nerve impulses. Transmission - receptor cells send nerve impulses to primary sensory cortex where specialised receptor cells respond as the process of perception begins. |
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What are the stages of perception? |
Selection - Important stimuli is selected to focus on. Organisation - when info reaches the brain, it is reorganised so we can make sense of it. Interpretation - Past experiences, motives, values and context are involved in giving meaning to stimulus. |
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What are the stages of sensation in vision? |
Reception - light enters the cornea --> passes through the pupil --> lens focuses light on retina which contains photoreceptors (rods and cones). Transduction - Light energy is converted by rods and cones into electrochemical nerve impulses. Transmission - Nerve impulses travel through optic nerve to primary visual cortex in occipital lobe. |
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What are the stages of perception in vision? |
Selection - Image is broken up by cells called feature detectors. Organisation - image is reassembled using perceptual constancies, Gestalt principles, depth cues before travelling down 2 pathways simultaneously: to temporal lobe (for identification) and to parietal lobe (judge where object is in space). Interpretation - temporal lobes identify object by comparing incoming info to existing info (past exp, motives, values and context) |
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What is the physiology of taste? |
Reception - chemicals are dissolved in saliva during chewing. Transduction - chemical energy is converted by receptors cells on taste buds into electrochemical nerve impulse. Transmission - from taste buds, nerve impulses travel through thalamus to primary gustatory cortex (in parietal lobe, behind somatosensory cortex) where perception continues. Perception - brain recognises sensation of a mixture of the 5 primary tastes, but combined with smell of food, colour & texture, we also perceive the flavour of what we eat. |
