what type of reflexes come into play when stepping on breaks in a car? and what receptors are used?

Answer 1

Well, first you see that big a*s truck in front of you, so the eyes have light receptors, the information goes to the retina, optic nerve, optic chiasm, optic tracts, lateral geniculate bodies, optic radiations to the primary visual cortex. This synapses on nerves that bring the information to the secondary visual cortex, the secondary processing centers, the superoir colliculus, the limbic system (you think "Oh, Sh*t!!")The primary motor cortex gets information from the cerebellum and spinal chord telling you where your limbs are. You order your leg to step on the brakes. This information goes from motor cortex through the corona radiata to the descending motor tracts along the spinal chord and synapse on the motor nuclei of L2-L5. These motor nuclei then activate the appropriate muscles in your thigh, leg and foot to step on the brake. Activation of the myoneural junction cause contraction of the appropriate muscles. The sensory inputs from your legs and feet as well as further information from your eye, and the charge you get as your sympathetic nervous system is activated makes you step harder on the brake until it locks up. You see yourself getting dangerously close to that truck!!! You grasp the steering wheel harder! You mentally calculate if the rate of deceleration will bring you to a stop before you hit that damn truck (where did it come from?!).