ANAT 102 Lecture Notes - Lecture 6: Itch, Medial Lemniscus, Posterior Grey Column
19 Sep 2016
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How information travels through body as a signal. 2 separate pathways that travel in parallel to each other from the shoulders down but the receptors in the skin overlap (so you can stimulate one or the other and sometimes both) o. Pain (physical like stepping on a nail or can be chemical like getting sprayed mace) One for fine touch (many more receptors in skin on finger than on back), vibration, texture, etc. 3 types of neurons that help relay information o o o. Multipolar neuron: cell body on one end that has dendrites around it with a long axon. Cell body is in between dendrite and axon. Cell body is in between dendrite and axon but sticks out laterally. Only transmit sensory information (brings sensory information into spinal cord like something from fingertips) o o. Unipolar neuron (brings sensory information into spinal cord like something from fingertips) Free nerve ending: detects very primal stimuli - unipolar neuron o.
