PSYC2274 Lecture Notes - Lecture 21: Muscle Spindle, Proprioception, Dorsal Root Ganglion
Document Summary
It has the layer of dead skin cells on the outermost and the living skin cells right underneath that. Dermis - middle layer blood vessels and hair follicles and nerve endings. Hypodermis - anchors skin to muscles and other tissues. All nerve endings contributing to tactile sensation are embedded in dermis/epidermis! The sensation that you get is dictated by the kind of neuron that is activated. No matter how it is activated, if you activate a pressure neuron, you will feel pressure, not matter how it was activated. All tactile stimulation is transduced by neurons called mechanoreceptors in the outermost layers of the skin. Mechanoreceptors respond to some kind of movement of the skin. Can be differentiated from each other in 3 different ways: Types of skin movement that causes a response (i. e. , pressure versus vibration): determined by the casing around the nerve ending. Size of rf (rf - perfectly analogous to visual rfs).
