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PSYB51H3 (306)
Chapter 12

PSYB51 Chapter 12 Definitions

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Department
Psychology
Course
PSYB51H3
Professor
Matthias Niemeier
Semester
Fall

Description
Chapter 12 Definitions • kinesthesis: The perception of the position and movement of our limbs in space. • proprioception: Perception mediated by kinesthetic and vestibular receptors. • somatosentation: A collective term for sensory signals from the body. • epidermis: The outer of two major layers of skin. • dermis: The inner of two major layers of skin, consisting of nutritive and connective tissues, within which lie the mechanoreceptors. • mechanorecptors: Sensory receptors that are responsive to mechanical stimulation (pressure, vibration, and movement). • Meissner corpuscle: A specialized nerve ending associated with fast-adapting (FA I) fibers that have small receptive fields. • Merkel cell neurite complex: A specialized nerve ending associated with slow-adapting (SA I) fibers that have small receptive fields. • Pacinian corpuscle: A specialized nerve ending associated with fast-adapting (FA II) fibers that have large receptive fields. • Ruffini ending: A specialized nerve ending associated with slow-adapting (SA II) fibers that have large receptive fields. • kinesthetic: Referring to perception involving sensory mechanoreceptors in muscles, tendons, and joints. • muscle spindle: A sensory receptor located in a muscle that senses its tension. • thermoreceptors: Sensory receptors that signal information about changes in skin temperature. • warmth fiber: A sensory nerve fiber that fires when skin temperature increases. • cold fiber: A sensory nerve fiber that fires when skin temperature decreases. • nociceptors: Sensory receptors that transmit information about noxious (painful) stimulation that causes damage or potential damage to the skin. • A-delta fiber: An intermediate-sized, myelinated sensory nerve fiber that transmits pain and temperature signals. • C fiber: A narrow-diameter, unmyelinated sensory nerve fiber that transmits pain and temperature signals. • spinothalamic pathway: The route from the spinal cord to the brain that carries most of the information about skin temperature and pain. dorsal column- medial lemniscal (DCML): The route from the spinal cord to the brain • that carries signals from skin, muscles, tendons, and joints. • somatosensory area 1 (S1): The primary receiving area for touch in the cortex. • somatosensory area 2 (S2): The secondary receiving area for touch in the cortex. • somatotopic: Spatially mapped in the somatosensory cortex in correspondence to spatial events on the skin. • homunculus: A maplike representation of regions of the body in the brain. phantom limb: Sensation p
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