Fill in the Blanks ANS organizationOnline version unit 2 by Kirsten Storemski 1 preganglionic gray afferent postganglionic cord somatic ganglion visceral autonomic single brain two spinal afferent fiber All of the fibers of the ANS are efferent ( motor ) fibers . The ANS gets sensory information from the and neurons . In the somatic nervous system a neuron links the brain to the spinal cord to the muscle . In the ANS efferent motor pathways include neurons . The cell body of one neuron is located in the matter of or . The axon from this cell body ( fiber ) leaves the spinal cord and synapses with the cell bodies found in the . The axon from this cell body ( ) extends into the viscera .