Anatomy and Cell Biology 3319 Lecture Notes - Lecture 10: Medial Lemniscus, Thalamus, Gracile Nucleus
23 Jun 2016
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We will talk about the main sensory pathways. These are the major ascending pathways that we"ll cover. These are all positive connections, so dw about disinhibition. Some of these neurons are connecting to regions that are very far apart and some are connecting to regions that are very close. Dorsal column and spinothalamic pathways are made of 3 neuron circuits, so we call them order neurons (1st order neurons carrying sensory info from periphery [pain, touch, etc. There are mirror images on the opposite side of pathways that we"ll be seeing. Dorsal column medial lemniscus is called that way b/c it"s coming in from 2 major tracts. 1st tract is the dorsal column, with neurons coming from lower body and from upper body. The same neuron that is traveling into the spinal cord is also going to travel all the way up the.
