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sensory connections
- gustation=taste
- olfactoin=smell
- tactile=touch
- thermal
- proprioception=muscles/body awareness
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gustation
- taste is triggered by chemoreceptors
- -chemorec. generate a neural response realted to specific chemicals
- -found on tongue, soft palate, epiglottis, and esophagus
- -types: sweet- tongue tip
- sour and salt- lateral tongue
- bitter-posterior tongue
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nerves for gustation
- VII facial
- IX glossopharyngeal
- X vagus
- -converge in solitary tract of the medulla
- -transmitted to the thalamus, tehn to the insula of the cortex
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olfaction
- triggered by chemoreceptors
- -found in epithelium of upper posterior nasal cavity
- -detection of more than 1,000 distinct odors
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tactile
- detected by mechanoreceptors in epithelium
- -movement of hairs, touch, pressure, stretch
- -superficial sensors more sensitive and respond to a limited area of stimulation
- -deep areless sensitive respond to larger area of stimulation
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thermal
- based on balance of activity for four types of receptors:cold, cool, warm, hot
- -send signals continually
- -each receptor fires most actively at a diff temp
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proprioception
- awareness of posture and position based on the current stretch and tension of musculature
- -stretch is detected by muscle spindle fibers located withing muscle
- -tension by golgi tendon
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