PSYB51H3 Lecture Notes - Lecture 11: Leprosy, Phantom Limb, Lamellar Corpuscle
Document Summary
Touch mechanical displacements and other physical impacts on the skin. Somatosensation a collective term for sensory signals from the body. If you stimulate 2 locations on the brain multiple times in quick succession it feels like a rabbit hopping across the skin between the two points being stimulated. There are 3 possible points (p1, p2, p3) where you can be stimulated, when p1 and p3 are stimulated you can see activity not only at those 2 points but also at p2. Touch receptors embedded in outer layer (epidermis) and the underlying area (dermis) There are many kinds of touch receptors, all touch receptors and other somatosensory receptors have 3 attributes: Type of stimulation the receptor responds to. Mechanoreceptors tactile receptors that respond to mechanical stimulation or pressure. 4 kinds: meissner corpuscles at surface smaller receptive field. Fa i: skin slip low-frequency vibration (3-40 hz: merkel cell neurite complexes at surface smaller receptive field.