PSYC 211 Chapter Notes - Chapter 8: Glutamine, Interposed Nucleus, Ventral Anterior Nucleus
2 Apr 2013
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Document Summary
Primary motor cortex lies on precentral gyrus which is just rostral to the central sulcus. Brief stimulation causes brief movements and prolonged stimulation causes more complex movements. Principal cortical input to the primary motor cortex is the frontal association cortex which is located rostral to it. The premotor cortex is on the lateral surface of the brain. Neurons in the primary motor cortex control movements by 2 groups of descending tracts. Lateral group includes the corticospinal tract, the corticobulbar tract, the rubrospinal tract: primarily involved in control of independent limb movements, particularly those of hands and fingers. Planning and initiating movements: role of the motor association cortex. Both receive info from association areas of the parietal and temporal cortex (about what is happening and where it is happening) The sma plays a critical role in behavioral sequences. Damage disrupts the ability to execute well learned sequences of reponses.
