PT 518 Study Guide - Quiz Guide: Lateral Corticospinal Tract, Medial Lemniscus, Spinocerebellar Tract

• School: Quinnipiac University
• Department: Physical Therapy
• Course: PT 518
• Professor: Kathleen Kelly

Document Summary

Overall organization of white matter: columns either contain sensory tracts (ascending) Lesions can result in weakness or total loss of function: motor tracts can become dysfunctional from, no active control, two descending tracts, lateral corticospinal tract (lcst) largest, anterior corticospinal tract (acst) Interneuron in spinal cord that forms the white matter tract and ascends to thalamus. Terminology denoting weakness: denoting severity, paresis = weakness (partial paralysis, plegia = no movement, paralysis = no movement, denoting location. Dorsal column: fasciculi gracilis (t6 or below) and cuneatus (above t6) Synapses in lamina v or vi of dorsal horn. In the spinal cord segment via the anterior gray commissure. Synapses in lamina i or v of dorsal horn. Synapses in gracilis cuneatus neuron of lower medulla. Continues to post central gyrus sensory association area 3,1,2. ~70% originates in primary motor cortex (area 4) remainder in pre and supplementary motor cortex. Cortex corona radiata and internal capsule cerebral peduncles ventral pons medullary pyramid.