<Li> Afferent nerve fibers carry signals from the somatic receptors to the posterior horn of the spinal cord or to the brainstem </Li> <Li> An integrating center, the point at which the neurons that compose the gray matter of the spinal cord or brainstem synapse </Li> <Li> Efferent nerve fibers carry motor nerve signals to muscles </Li> <Li> Effector muscle innervated by the efferent nerve fiber carries out the response . </Li>

Where are the cell bodies of the motor neurons that are involved in the spinal reflex arc located