PSYC 107 1nd Edition Lecture 17 Outline of Last Lecture I Vision Feature Detection Shape Detection II Color III Hearing Outline of Current Lecture I Touch II Smell and Taste III Sensory Interaction IV Balance and Motion V Form Perception VI Depth Perception Current Lecture I Touch a Touch is a mix of distinct skin senses i Pressure only one to have identifiable receptors ii Warmth iii Cold iv Pain b Purpose of pain allows the body to know when something has gone wrong c Pain messages are interpreted by both the sensory cortex and the areas of the brain associated with emotions and memory i Biopsychological Influences 1 Biological differences in pain thresholds ii Psychological 1 Distraction These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute 2 Expectations iii Social d Pain Theories i Gate Control Theory small nerve fibers transmit pain while large nerve fibers transfer other information closing the gate way is done by stimulating large fibers to block the small II Smell and Taste a Odors are airborne chemicals that interact with receptors in our nasal passages b Humans can identify 10 000 different odors c We can detect 5 tastes sweet sour salty bitter savory and fat i Papillae on the tongue contain taste buds that contain sense receptors ii Tongue map different parts of the brain are responsible for different tastes is a myth iii The brain region for small is closely related to the memory section which is why many memories are associated with smell iv Taste gustation v Smell olfaction vi The distinguishing between pleasant and disgusting smells is done by the limbic system vii Tasting disgusting food and viewing facial expressions activate the cortex viii Pheromones are the odorless chemicals that serve as a social signal to others of the same species III Sensory Interaction a Taste and smell and texture all combine to get flavor b Vision and touch in the rubber hand illusion i A participant has their hand placed somewhere safe and a rubber hand is placed in the view of the participant ii The administrator strokes both hands and the same time then hits the rubber hand with a hammer iii The participant believes their hand was hit IV Balance and Motion a The sense of our body parts position and movement is called kinesthesis b The vestibular sense monitors head and body position c Proprioceptors i Muscle strength receptors ii Tendon force receptors iii Information travels to somatosensory and motor cortices d Semicircular canals i Fluid filled canals are responsible for our sense of balance ii Otholihs is the tiny crystal sense linear movement and gravity iii Information travels to the brain stem and cerebellum V Form Perception a Organization of the visual field in to figures that stand out from the ground VI Depth Perception a All species can see a sharp drop from the time they are born b Humans can see this at about 6 months c Depth perception is learned
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