There are two divisions of nerves, the afferent and efferent.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
The afferent nerves are those which convey the impression to the nerve centers.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
We cannot here go into a detailed discussion of the physiological processes involved in thinking and other forms of behavior, but perhaps we may well set down a statement or two relative to man's tendencies to act, and their explanations: "The nervous system is composed of neurones of three types: Those that receive, the afferent; those that effect action, the efferent; and those that connect, the associative.
"Principles of Teaching"
Adam S. Bennion