ANAT 3010 Lecture Notes - Lecture 19: Spinocerebellar Tract, Spinothalamic Tract, Dorsal Root Ganglion

• School: Dalhousie University
• Department: Anatomy
• Course: ANAT 3010
• Professor: Thejodhar Pulakunta

Document Summary

Anat 3010 lecture 19 march 4, 2020 sensory pathways in cns (ascending pathways) Sensory and motor pathways in the cns: multineuron pathways connect brain and body periphery. Pathways are composed of tracts: ascending pathways carry information to more rostral areas of the cns, descending pathways carry information to more caudal regions of the cns. Ascending tracts carry sensory information from the spinal cord up to the brain. Ascending tracts: conduct general somatic sensory impulses, chains of neurons composed of first-, second-, and third- order neurons, four main ascending pathways, dorsal column pathway (dcp, spinothalamic pathway (sp, posterior spinocerebellar pathway (psp, anterior spinocerebellar pathway (asp) The ascending tract consists of 2 or 3 neurons in a chain, typically called first-, second- and third-order neurons. First orders neurons are always the sensory neurons that have their cell bodies in the dorsal root ganglia. There are two spinocerebellar pathways: one posterior and one anterior. The dcp and sp"s destination is the somatosensory cortex.