The flexor reflex moves a limb away from a painful stimulus. So third option is the correct answer.
The flexion reflex that removes noxious stimuli from the limb has at least two interneurons and three synapses. The flexion and extension reflexes are just two examples of the sequential arrangement of muscle contraction and relaxation.
Since the flexion reflex affects the entire limb, the pathways are distributed over several segments of the spinal cord. These include motor neurons that innervate all limb flexors. All primary afferent fibers bifurcate as they enter the spinal cord. The withdrawal reflex (nociceptive flexion reflex or flexion-withdrawal reflex) is a spinal reflex designed to protect the body from harmful stimuli.
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