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Titolo:
Neural population coding and auditory temporal pattern analysis
Autore:
Covey, E;
Indirizzi:
Univ Washington, Dept Psychol, Seattle, WA 98195 USA Univ Washington Seattle WA USA 98195 Dept Psychol, Seattle, WA 98195 USA
Titolo Testata:
PHYSIOLOGY & BEHAVIOR
fascicolo: 1-2, volume: 69, anno: 2000,
pagine: 211 - 220
SICI:
0031-9384(20000401)69:1-2<211:NPCAAT>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
BIG BROWN BAT; COMBINATION-SENSITIVE NEURONS; MEDIAL SUPERIOR OLIVE; WHITE-CROWNED SPARROW; INFERIOR COLLICULUS; EPTESICUS-FUSCUS; ECHOLOCATING BAT; MOUSTACHED BAT; BRAIN-STEM; FILTERING PROPERTIES;
Keywords:
population code; across-fiber pattern; auditory system; information processing; temporal patterns; electrophysiology; whole-cell patch-clamp recording; echolocating bats; inferior colliculus; duration tuning; tuning to modulation rate;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Social & Behavioral Sciences
Life Sciences
Citazioni:
84
Recensione:
Indirizzi per estratti:
Indirizzo: Covey, E Univ Washington, Dept Psychol, Box 351525, Seattle, WA 98195 USA Univ Washington Box 351525 Seattle WA USA 98195 tle, WA 98195 USA
Citazione:
E. Covey, "Neural population coding and auditory temporal pattern analysis", PHYSL BEHAV, 69(1-2), 2000, pp. 211-220

Abstract

Over the 2 decades that have elapsed since Robert Erickson first publishedhis pioneering work on across-fiber patterns in the gustatory system, the idea that information is represented by a population code has become almostuniversally accepted among neuroscientists. Although the concept of a population code is an implicit theoretical assumption underlying most of the work done in neuroscience today, the details of how population codes operate in specific systems remain unclear in many respects. This article reviews electrophysiological studies of the auditory system of echolocating bats that show that information about sound is initially represented across both space and time by relative amounts of activity in populations of excitatory and inhibitory neurons with different discharge patterns, different sensitivity functions, and different latencies. At the next level, each neuron in the auditory midbrain receives convergent input from a specific population of these lower brainstem neurons and acts as a "readout" of activity within this population. As a result, midbrain neurons be come selectively tuned tostimulus features, for example, signal duration, to which neurons at lowerlevels respond indiscriminately. Intracellular recordings from auditory midbrain neurons show some of the mechanisms by which population input is processed. The known projection patterns of the midbrain "readout" neurons indicate that they, in turn, must become part of a new spatio-temporal population code that is transmitted to neurons at the thalamus, where additional forms of selectivity and patterns of output arise. (C) 2000 Elsevier ScienceInc. All rights reserved.

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Documento generato il 01/12/20 alle ore 13:33:43