-Fractionated reaction time is divided into two components:

·

Premotor Reaction time, which is the onset of the stimulus to the onset of the muscle activation. This involves EMG. Pre motor RT is providing someone with an index that shows the processing time to plan and program a response.

·

Motor RT measures the time that movement time begins. It reflects an electro mechanical delay that is associated with the lag muscle to overcome inertia of the limb.

-M-Matthew D. Heath University of Western Ontario