ANAT 102 Study Guide - Midterm Guide: Dorsal Root Ganglion, Sacral Plexus, Lumbar Plexus
Document Summary
Injuries to cortex, internal capsule, umn,lmn, cerebellum, spinal cord: injury affects 3 pathways, motor: corticospinal tract (lateral, sensory: Impacts left side proprioception (ipsilateral: you would lose lower limbs at. Damage to left or right side of cord or brain stem to this tract would affect contralateral side: know how to determine where the injury is. Damage to c4 would result in quadriplegia, no limbs, just breathing. T2 paraplegia: transection=both halves of spinal cord (ex. Regulated (command funct) from frontal lobe to do an action (any repetitive action /riding a bike) they are triggered by conscious control, they tell the motor sys. Lmn: umn, basal nuclei neurons: no voluntary control. Involved with intentional direct movements (throwing a football, non repeptitive). How they work: frontal cortex gets idea of doing this action, basal nuclei monitor; calculate magnitude and muscles needed to do action, coordinates and smooths movement and transition btwn muscle groups.
