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Sensory Communication$
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Walter A. Rosenblith

Print publication date: 2012

Print ISBN-13: 9780262518420

Published to MIT Press Scholarship Online: August 2013

DOI: 10.7551/mitpress/9780262518420.001.0001

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Possible Principles Underlying the Transformations of Sensory Messages

Possible Principles Underlying the Transformations of Sensory Messages

Chapter:
(p.216) (p.217) 13 Possible Principles Underlying the Transformations of Sensory Messages
Source:
Sensory Communication
Author(s):

H. B. Barlow

Publisher:
The MIT Press
DOI:10.7551/mitpress/9780262518420.003.0013

This chapter is an attempt to formulate ideas about the operations performed by physiological mechanisms, and not merely a discussion of the physiological mechanisms of sensory pathways. It presents three hypotheses regarding the purpose of sensory relays. The first one is the “password” hypothesis, which posits that, since animals respond specifically to specific stimuli, their sensory pathways must possess mechanisms for detecting such stimuli and discriminating between them. The second hypothesis is the fashionable one that relays act as control points at which the flow of information is modulated according to the requirements of other parts of the nervous system. Finally, the third hypothesis theorizes that reduction of redundancy is an important principle guiding the organization of sensory messages and is carried out at relays in the sensory pathways.

Keywords:   physiological mechanisms, sensory pathways, sensory relays, password hypothesis, reduction of redundancy, sensory messages

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