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Titolo:
Corticofugal reorganization of the midbrain tonotopic map in mice
Autore:
Yan, J; Ehret, G;
Indirizzi:
Univ Calgary, Fac Med, Neurosci Res Grp, Dept Physiol & Biophys, Calgary, AB T2N 4N1, Canada Univ Calgary Calgary AB Canada T2N 4N1 ophys, Calgary, AB T2N 4N1, Canada Univ Ulm, Dept Neurobiol, D-89069 Ulm, Germany Univ Ulm Ulm Germany D-89069 v Ulm, Dept Neurobiol, D-89069 Ulm, Germany
Titolo Testata:
NEUROREPORT
fascicolo: 15, volume: 12, anno: 2001,
pagine: 3313 - 3316
SICI:
0959-4965(20011029)12:15<3313:CROTMT>2.0.ZU;2-H
Fonte:
ISI
Lingua:
ENG
Soggetto:
PRIMARY AUDITORY-CORTEX; INFERIOR COLLICULUS; FREQUENCY REPRESENTATION; HOUSE MOUSE; GUINEA-PIG; MODULATION; RESPONSES; BAT; ORGANIZATION; PROJECTIONS;
Keywords:
auditory cortex; auditory midbrain; colliculus inferior; corticofugal modulation; hearing; neural plasticity; mouse; tonotopic map;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
23
Recensione:
Indirizzi per estratti:
Indirizzo: Yan, J Univ Calgary, Fac Med, Neurosci Res Grp, Dept Physiol & Biophys, 3330 HospDr NW, Calgary, AB T2N 4N1, Canada Univ Calgary 3330 Hosp Dr NW Calgary AB Canada T2N 4N1 4N1, Canada
Citazione:
J. Yan e G. Ehret, "Corticofugal reorganization of the midbrain tonotopic map in mice", NEUROREPORT, 12(15), 2001, pp. 3313-3316

Abstract

Previous studies have indicated that frequency maps (tonotopies) in mammalian auditory brain centers are plastic. Here, we examined this plasticity in the mouse auditory midbrain through focal stimulation of the primary auditory cortex. Cortical activation shifted midbrain frequency tunings toward the best frequencies of the stimulated cortical neurons if these were either higher or lower than the cortical ones. Such corticofugal adjustments appear to minimize the difference between cortical and collicular frequency tuning within the critical bandwidths of the auditory system. Consequently, the neural representation is enhanced for the frequencies to which the cortical neurons were tuned. Our data suggest that the auditory cortex reorganizes midbrain tonotopy on the basis of which cortical frequencies are stimulated, mostly probably through corticofugal projections. NeuroReport 12:3313-3316 (C) 2001 Lippincott Williams & Wilkins.

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Documento generato il 28/11/20 alle ore 09:18:43