Reaction time is the time between a stimulus at the start of the movement. Reaction time is one part of a larger unit called respone time.
Reaction time + movement time = response time
There are 4 stages to this:
1) Stimulus activates the appropriate sensory system eg by hearing the gun at the start of the race
2) Signal travels from sensory system to brain
3) Brain processes signal/stimulus
4) Commands are sent to…