PSYB51H3 Lecture Notes - Lecture 11: Formant, Prefrontal Cortex, Coordinate System
Document Summary
Touch and more: touch: mechanical displacements and other physical impacts on the skin, proprioception: perception mediated by kinesthetic and vestibular receptors, somatosensation: a collective term for sensory signals from the body, actions play a special role: haptics. What do you feel: => subtracting (less interesting) sensation of the pen. Volunteers: 2 separate locations stimulated multiple times in quick succession feels like a rabbit, hopping across the skin between the 2 locations. Investigated with fmri: middle location equally activated as stimulated locations. Touch receptors: embedded in outer layer (epidermis) and underlying layer (dermis) Touch receptors (& other somatosensory receptors) have three attributes: Tactile receptors (four): mechanoreceptors- respond to mechanical stimulation or pressure. Pacinian corpuscles (dermus, deeper down, less sensitive to smaller spaces on skin) Fai (fast adaptation): skin slip; low-frequency vibration (3-40hz) Faii: first contact with objects: high frequency vibration (50-700 hz)
