Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
DEVELOPMENT OF TONOTOPY IN THE INFERIOR COLLICULUS-II - 2-DG MEASUREMENTS IN THE KITTEN
Autore:
EHRET G; ROMAND R;
Indirizzi:
UNIV ULM,VERLEICHENDE NEUROBIOL ABT D-89069 ULM GERMANY UNIV CLERMONT FERRAND,NEUROBIOL LAB F-63177 CLERMONT FERRAND FRANCE
Titolo Testata:
European journal of neuroscience
fascicolo: 10, volume: 6, anno: 1994,
pagine: 1589 - 1595
SICI:
0953-816X(1994)6:10<1589:DOTITI>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
AUDITORY-NERVE FIBERS; POSTNATAL-DEVELOPMENT; C-14 2-DEOXYGLUCOSE; MONGOLIAN GERBIL; PLACE PRINCIPLE; CHARACTERISTIC FREQUENCY; COCHLEAR NUCLEUS; GUINEA-PIG; CAT; ORGANIZATION;
Keywords:
AUDITORY DEVELOPMENT; CAT; MIDBRAIN; FREQUENCY REPRESENTATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
64
Recensione:
Indirizzi per estratti:
Citazione:
G. Ehret e R. Romand, "DEVELOPMENT OF TONOTOPY IN THE INFERIOR COLLICULUS-II - 2-DG MEASUREMENTS IN THE KITTEN", European journal of neuroscience, 6(10), 1994, pp. 1589-1595

Abstract

The development of size and tonotopy in the inferior colliculus of the kitten was studied using the [C-14]2-deoxyglucose technique and tonestimulation with 2 and 15 kHz at a maximum 110 dB sound pressure level. At 2 days of age, frequency-specific labelling cannot be detected. Two kilohertz labelling is distinctly visible in the rostral and central inferior colliculus at day 6; 15 kHz labelling occurs first at day 11. In the rostral and central inferior colliculus, 2 kHz labelling starts at a Ventral and central position and shifts dorsalwards and to amore lateral location between postnatal days 6 and 21. Such a shift is not seen in the caudal inferior colliculus. There, the focus of 2 kHz labelling remains rather constant; only the extension of the labelling increases in the older animals. In all parts of the inferior colliculus, 15 kHz labelling starts at a ventromedial position and shifts toa more lateral location while extending also more dorsalwards as the age increases. These changes in 15 kHz labelling continue up to 3 months. In addition to the ventromedial-to-dorsolateral shift and expansion of labelling, there is also a rostral-to-caudal gradient of maturation, in that in older animals frequency-specific labelling reaches farther caudalwards. The reported changes in frequency representation in the inferior colliculus can be explained on the basis of a shift in frequency input and input sensitivity to the laminae of the inferior colliculus, mainly due to maturational changes within the cochlea and/or as a consequence of the increasing size of the inferior colliculus.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 19:45:23