Coordinate Transformations, Role of Spinal Cord in
The process through which a motor target in the external environment is translated into a body-centered coordinate system is called coordinate transformation. In the motor system, this translation is often referred to as the transformation of an externally defined (e.g., in a retinotopic coordinate frame) target into a muscle-based (or intrinsically defined) motor command. Multiple cortical areas are known to be involved in this process. Many of these areas, including pre- and post-central sites, project downstream to activate directly and indirectly spinal neurons. The interaction of this extensive system of descending pathways with spinal circuitry may further adjust motor commands before they reach target muscles in a final processing step of coordinate transformation.
KeywordsMotor Cortex Cortical Neuron Coordinate Transformation Hand Posture Motor Command
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