OT 335 Study Guide - Quiz Guide: Internal Arcuate Fibers, Dorsal Root Ganglion, Cuneate Nucleus

• School: Quinnipiac University
• Department: Occupational Therapy
• Course: OT 335
• Professor: Barb

Document Summary

Neuro quiz 4 (october 9) study guide. Describe all steps of the lateral spinothalamic tract. Transmits pain and temperature (nociceptors and thermoreceptors) Info sent to cell body of first order neuron in dorsal root ganglion. Enters spinal cord via dorsal root and synapses on second order neuron (some fibers will travel up or down 1-2 segments in lissauer"s tract: majority of fibers decussate. 2nd order fibers project up spinal cord: merge with the medial lemniscal tract. Synapse in vpl (ventral posterolateral) nucleus of thalamus. 3rd order fibers ascend to post central gyrus via internal capsule. Describe all steps of dorsal column medial lemniscus tract. Carries discriminative touch and conscious proprioception (mechanoreceptors, muscle spindles, golgi tendon organs) Info sent to cell body in dorsal root ganglion. Enters dorsal horn of spinal cord via dorsal root. Axons from lower body are medial in fasciculus gracilis. Axons from upper body are lateral in fasciculus cuneatus. Axons from fasciculus gracilis synapse in nucleus gracilis.