PHYSL212 Study Guide - Axon Terminal, Myelin, Brainstem
13 Oct 2014
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1: describe process of sensory receptor activation, adaptation, lateral inhibition, describe processes/pathways by which somatic sensation is modulated by descending commands and carried to the cerebral cortex. Are specialized cells that generate graded potentials called receptor potentials in response to a stimulus. Different stimulus types/modalities are sensed by different sensory receptors. Muscle stretch (stretch reflex) or other sensory stimuli (results in increased na) Either a) afferent axons itself or b) specialized receptor cells. We have slow and rapid adapting receptors. Slow: you put a shirt on, you forget about the shirt after a few minutes (activation is based on touch) Sensation from the skin, muscles, bones, tendons and joints, or somatic sensation, is initiated by variety of sensory receptors collectively called somatic receptors. Respond to: touch and pressure, sense of posture and movement, temperature, pain. Lips are densely innervated by afferents (vs skin [not as dense])
