Group redundancy measures reveal redundancy reduction in the auditory pathway

Gal Chechik, Amir Globerson, Naftali Tishby, Michael J. Anderson, Eric D. Young, Tsrael Nelken

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

20 Scopus citations


The way groups of auditory neurons interact, to code acoustic information is investigated using an information theoretic approach. We develop measures of redundancy among groups of neurons, and apply them to the study of collaborative coding efficiency in two processing stations in the auditory pathway: The inferior colliculus (IC) and the primary auditory cortex (AI). Under two schemes for the coding of t he acoustic content, acoustic segments coding and stimulus identity coding, we show differences both in information content and group redundancies between IC and Al neurons. These results provide for t he first time a direct evidence for redundancy reduction along the ascending auditory pat hway, as has been hypothesized for theoretical considerations [Barlow 1959.2001]. The redundancy effect s under the single-spikes coding scheme are significant only for groups larger than ten cells, and cannot be revealed with the redundancy measures that use only pairs of cells. The results suggest that the auditory system transforms low level representations t hat contain redundancies due t o t he statistical st ructure of natural stimuli, into a representation in which cortical neurons extract rare and independent component of complex acoustic signals, t hat are useful for auditory scene analysis.

Original languageEnglish
Title of host publicationAdvances in Neural Information Processing Systems 14 - Proceedings of the 2001 Conference, NIPS 2001
PublisherNeural information processing systems foundation
ISBN (Print)0262042088, 9780262042086
StatePublished - 2002
Externally publishedYes
Event15th Annual Neural Information Processing Systems Conference, NIPS 2001 - Vancouver, BC, Canada
Duration: 3 Dec 20018 Dec 2001

Publication series

NameAdvances in Neural Information Processing Systems
ISSN (Print)1049-5258


Conference15th Annual Neural Information Processing Systems Conference, NIPS 2001
CityVancouver, BC


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