With such similar-sounding words, it can be tough to remember the difference between afferent vs efferent . That’s why it’s important to focus on the difference in what they do first.You can think of afferent and efferent neurons pathways as one-way streets. The traffic can only flow in one direction – afferent neurons only take information to the central nervous system, and efferent neurons only take it away from the central nervous system. Afferent and efferent neurons are part of your somatic nervous system, which is responsible for all the voluntary muscle movements in your body. When you kick a ball, scratch your head, or do push-ups at the gym, afferent and efferent neurons are evaluating stimuli and allowing you to respond. Interneurons, on the other hand, are part of the central nervous system.Our nervous system is divided into two parts. The central nervous system includes the brain and the spinal cord.