CAPS 301 Lecture Notes - Lecture 9: Lamellar Corpuscle, Golgi Tendon Organ, Bulbous Corpuscle
24 Sep 2018
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Slowly adapting receptors: tonic; keep firing rate generally constant. = increased potential of ap on top of generator potentials. Rapidly adapting receptors: phasic; aps occur only at the peaks. Generally, adaptation in mechanoreceptors is due to accessory (non-neuronal) structures surrounding the axon terminal. Generating potentials made in the bare ending of the corpscl. Depolarizations occurring inside the membrane = generator potential, which may turn into action potentials if big enough. If press on capsule, the liquid is non-compressible. Therefore, force transmits down to the surface of the axon, through the layers, which create the generator potential. If the press is maintained, fluid will be squished out and redistribute so channels close and the generator potential stops, and action potentials stop. Adaptation to the presence of the pressure. Mechanical gating of the axon is stopped. Meissner"s corpuscles, pacinian corpuscles and endings surrounding hair follicles are: Proprioception: cerebellum receives information and detects where you are in 3d space.
