A simple feed-forward control schematic. “Plant” is the control theory term for the controlled system;
in the case of motor control, the plant is the body, specifically the musculoskeletal system (MSS) and relevant
proprioceptive/kinesthetic systems. Here, the “plant” includes the MSS, sensors, and any random perturbations,
such as muscle twitches and noise in the sensors. These components will be treated separately in
later sections.