PSYB55H3 Chapter Notes - Chapter 18: Supplementary Motor Area, Action Selection
Document Summary
The affordance competition hypothesis proposes that the processes of action selection (what to do) and specification (how to do it) occur simultaneously w/i an interactive neural network that continuously evolves from planning to execution. Rather than view selection and planning as serial processes, neural activity reveals that there is parallel activation of multiple goals + mvmnt plans. Supplementary motor area is imp for coordinating motor behav in time (sequential mvmnts) and b/w limbs (bimanual coordination). Parietal motor areas also show topography: different regions of the intraparietal cortex are assoc"d w/ hand, arm, and eye mvmnts. Parietal motor repr"ns are more goal oriented, whereas premotor-motor repr"ns are more closely linked to the mvmnt itself. Conscious awareness of mvmnt appears to be related to the neural processing of action intention rather than the mvmnt itself. The brain-machine interface: brain-machine interface (bmi): a device that uses the interpretation of neuronal signals to perform desired operations w/ a mechanical device outside the body.
