PSYO 2470 Lecture Notes - Lecture 5: Lamellar Corpuscle, Glabrousness, Receptive Field
4 Feb 2018
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3 separate systems: exteroceptive: external stimuli (general applied to the skin), proprioceptive: body position (found in muscle, joints, balance organs, interoceptive: general body conditions (changes on body temperature, glucose levels) Layers of the skin: 1) epidermis (outer layer); 2) dermis (inner layer) Pacinian corpuscles. (found in both types of skin). Ruffini"s endings. (found in both types of skin). Meissner"s corpuscles. (found near the surface of the skin and just in the glabrous skin). Merkel"s disks. (found in the epidermis; these are free nerve endings. ) free endings are useful to understand changes of movement. Krause end bulbs. (found in very sensitive areas like lips and genitals). Na+ and ca2+ rush into the cell to produce action potentials. Some of these ions channels they are attached to extracellular protein to help opening up the channels. Some on channels also have a cytoskeleton protein attached (inside the cell), this also helps opening the channels.
