감각통합-Sensory System 정리

소개글

감각통합의 Sensory System 3가지를 정리한 것입니다.
1. Tactile
2. Vestibular
3. Proprioception
(루트 그림 있음)

목차

1) Tactile System
2) Vestibular System
3) Proprioceptive System

본문내용

1) Tactile System
① MECHANORECEPTORS : respond to pressure on the skin. Near the surface are MERKEL`S DISKS and MEISSNER`S CORPUSCLES. Both have small receptive fields but Meissner`s corpuscles are RAPIDLY ADAPTING (RA) while Merkel`s discs are SLOWLY ADAPTING (SA) mechanoreceptors. Deeper in the skin are RUFFINI`S END ORGANS AND PACINIAN CORPUSCLES. Both have large receptive fields. Ruffini`s are SA and Pacinian`s are RA mechanoreceptors. All of these are encapsulated nerve endings (i.e., dendrites).

② TEMPERATURE RECEPTORS: HOT FIBERS are free nerve endings of small unmyelinated axons (C-fibers). Their firing rate increases when skin temperature is above 35 degrees C but decreases above 45 degrees. COLD FIBERS are free nerve endings of small myelinated axons (A-delta). They increase their firing rate if skin temperature falls below 35 degrees and also when temperature rises above 45 degrees. The latter response may account for paradoxical cold(e.g., shivering and goose bumps in a hot bathtub.

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