Zurich Open Repository and Archive University of Zurich Main Library Strickhofstrasse 39 CH-8057 Zurich www.zora.uzh.ch Year: 1990 Dichotomic classification of sensory neurons: Elegant but problematic Neuhuber, W L DOI: https://doi.org/10.1017/s0140525x00078882 Posted at the Zurich Open Repository and Archive, University of Zurich ZORA URL: https://doi.org/10.5167/uzh-154322 Journal Article Published Version Originally published at: Neuhuber, W L (1990). Dichotomic classification of sensory neurons: Elegant but problematic. Behav- ioral and Brain Sciences, 13(02):313-314. DOI: https://doi.org/10.1017/s0140525x00078882 BEHAVIORAL AND BRAIN SCIENCES (1990) 13, 289-331 Printed in the United States of America B-Afferents: A fundamental division of the nervous system mediating hoxneostasis? James C. Prechtl* Terry L* Powley Laboratory of Regulatory Psychobiology, Department of Psychological Sciences, Purdue University, West Lafayette, IN 47907 Electronic mail:
[email protected]@brazil.psych.edu *Reprint requests should be addressed to: James C. Prechtl, Department of Neuroscience, A-001, University of California, San Diego, La Jolla, CA 92093 Abstract? The peripheral nervous system (PNS) has classically been separated into a somatic division composed of both afferent and efferent pathways and an autonomic division containing only efferents. J. N. Langley, who codified this asymmetrical plan at the beginning of the twentieth century, considered different afferents, including visceral ones, as candidates for inclusion in his concept of the "autonomic nervous system" (ANS), but he finally excluded all candidates for lack of any distinguishing histological markers. Langley's classification has been enormously influential in shaping modern ideas about both the structure and the function of the PNS.