PSY100H1 Chapter Notes - Chapter 4.4: Spinal Cord, Nociception, Nociceptor
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PSY100H1 Full Course Notes
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Haptics: exploratory aspect of touch sensation and perception: moving your hand around to identify the object. Kinesthesis: sense of bodily motion & position: receptors in the muscles, joints, and tendons. Feeling pain: nociception: activity of nerve pathways that respond to uncomfortable stimulation. Nerves in spinal cord determine how much pain signals reach brain. Spinal cord = gate where pain messages pass through. Larger nerves- conduct other sensory signals: inhibit pain signals w/ other signals, somatosensory cortex: register the pain sensations, anterior cingulate gyrus: influence attentional & emotional responses to the pain. Phantom limb sensations: amputees often feel pain in body parts that no longer exist, rewiring occurs in brain after loss of the limb. Following amputation, somatosensory cortex corresponding to the area= no more stimulation. Healthy nerve cells become hypersensitive when the lose connections. Gustatory system: sensation & perception of taste. Primary tastes: salty, sweet, bitter, sour, umami (savory) Taste registered on tongue- through taste buds.
