KNES 385 Lecture Notes - Lecture 23: Prefrontal Cortex, Supplementary Motor Area, Sensory Cortex
19 Nov 2016
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Document Summary
Cortical influences on motor control and somatosensory information that is used to generate motor plans somatosensory feedback commands. Related to the planning and control of movements (how the action is to be: cerebellum. Cortical activation carried out) and environmental constraints integrate the information: pm cortex. Simple flexion performed with right index finger: motor cortex, somatic sensory cortex. Movement sequence performed with fingers of right hand: sma (supplementary motor area) Involved in planning of this action: inferior prefrontal cortex, motor cortex, somatic sensory cortex. Trigger center, activates ~50 ms before movement. Somatotopic organization of the motor cortex is much more coarse compared to somatosensory cortex. Early researchers through the motor cortex had a detailed representation of muscles. Later studies demonstrated that microstimulation of the cortex results in excitation of multiple muscles. Similarly, the same movement could be elicited with stimulation of several different cortical sites.
