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Titolo:
FREQUENCY REPRESENTATION IN THE EMU BASILAR PAPILLA
Autore:
KOPPL C; MANLEY GA;
Indirizzi:
TECH UNIV MUNCHEN WEIHENSTEPHAN,INST ZOOL,LICHTENBERGSTR 4 D-85747 GARCHING GERMANY UNIV WESTERN AUSTRALIA,DEPT PHYSIOL NEDLANDS WA 6009 AUSTRALIA
Titolo Testata:
The Journal of the Acoustical Society of America
fascicolo: 3, volume: 101, anno: 1997,
pagine: 1574 - 1584
SICI:
0001-4966(1997)101:3<1574:FRITEB>2.0.ZU;2-T
Fonte:
ISI
Lingua:
ENG
Soggetto:
INFRASOUND SENSITIVE NEURONS; AUDITORY-NERVE FIBERS; COCHLEAR GANGLION; PLACE MAP; PIGEON; INNERVATION; BIRDS; FOVEA; BAT; CAT;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
38
Recensione:
Indirizzi per estratti:
Citazione:
C. Koppl e G.A. Manley, "FREQUENCY REPRESENTATION IN THE EMU BASILAR PAPILLA", The Journal of the Acoustical Society of America, 101(3), 1997, pp. 1574-1584

Abstract

The frequency representation on the basilar papilla of the emu was investigated by recording from single auditory afferents and labeling them iontophoretically with horseradish peroxidase. Successfully labeledfibers covered a range of characteristic frequencies from 0.05 to 3.3kHz, which corresponded to nearly 90% of the total papillar length. The termination sites of labeled fibers within the basilar papilla correlated with their characteristic frequency, the lowest frequencies being represented apically, the highest basally. The best mathematical description of the frequency distribution was given by an exponential regression, with a uniform mapping constant of 0.8 mm/octave. This function deviates from the more commonly observed pattern of increasing space constant towards higher frequencies. Most labeled fibers innervatedonly one hair cell; those contacting 4 or more hair cells were all oflow characteristic frequency (less than or equal to 0.11 kHz). All labeled fibers terminated within the neural 56% of the basilar papilla'swidth. This innervation pattern is consistent with that observed in other bird species. There was no conclusive evidence for a change of sensitivity and/or frequency selectivity with innervational position across the papilla's width. (C) 1997 Acoustical Society of America.

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Documento generato il 30/11/20 alle ore 03:30:15