[chelsie2000]

functioning of what part of the centr? continuation........central nervous system?

[insider]

The spine.The reaction comes before your brain is even aware of it.

[Clare S]

This is a reflex action controlled by the spinal cord.Reflex actions are rapid, automatic and below the level of consiousnessie we are usually only aware that they have occured after the event. They are rapid to remove a limb/ part of the body from potential harm.Hope this helps!

[L a u r a //x]

it's the reflex action which goesstimulus (pin) sensory neuronerelay neuronemotor neuronereaction

[akansha s]

it is a reflex action which is controlled by spinal cord..........our body's all reflexes are controlled by spinal cord.