PSYC 427 Lecture Notes - Lecture 14: Alpha Motor Neuron, Premotor Cortex, Motor Cortex
Document Summary
Non-primary motor areas outputs from cma where it ends up in spinal cord anterograde tracers injected into cortex shows labeling that occurs in cervical spinal cord after injection into cingulate motor areas. Hand area representations are interesting because have disproportionate amount of connections from primary motor areas hand areas. want to identify the connectivity in hand control circuit + output to spinal cord each dot = electrode penetration. Dark circle = site at which finger movements were evoked. size of circle = threshold for stimulation. larger circle = lower threshold for stimulation. Location of digit representations in cortical motor areas. Digit representations of m1, pmd, and pmv mapped using intracortical stimulation. Then, fb (fast blue) injected into one digit representation and dy (diamadino yellow) into another. A, dashed box on cebus monkey brain delineates region. Symbols indicate the movement evoked at each site and its threshold.
