PSYC 2050U Lecture Notes - Lecture 6: Somatotopic Arrangement, Intraparietal Sulcus, Subthalamic Nucleus
Document Summary
Movement response time is limited by physiological constraints. Eyes are necessary for vision, but also a part of motor response. Eyes move around to center fovea on areas of interest, fixation points. Generated using multiple hierarchically controlled systems in tandem chunked. Integration of vision, touch, and proprioception: locate target in space. Problem target location (in eye-centered coordinates) must be coded with respect to the head, arm, and hand. Because both the eye and hand are constantly moving, the relationship between where a target is on the retina and where a target is with respect to the hand is always changing. Typically, efference copy serves to dampen the unwanted sensory consequences of our own actions. For example, you may have noticed that you don"t even notice the touch information that arises as you move around, and you might have also noticed it"s very difficult to tickle yourself.
