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Titolo:
Auditory cortical responses to amplitude modulations with spectra above frequency receptive fields: evidence for wide spectral integration
Autore:
Schulze, H; Langner, G;
Indirizzi:
Leibniz Inst Neurobiol, D-39118 Magdeburg, Germany Leibniz Inst NeurobiolMagdeburg Germany D-39118 9118 Magdeburg, Germany Tech Univ Darmstadt, Inst Zool, D-64287 Darmstadt, Germany Tech Univ Darmstadt Darmstadt Germany D-64287 D-64287 Darmstadt, Germany
Titolo Testata:
JOURNAL OF COMPARATIVE PHYSIOLOGY A-SENSORY NEURAL AND BEHAVIORAL PHYSIOLOGY
fascicolo: 6, volume: 185, anno: 1999,
pagine: 493 - 508
SICI:
0340-7594(199912)185:6<493:ACRTAM>2.0.ZU;2-K
Fonte:
ISI
Lingua:
ENG
Soggetto:
GERBIL MERIONES-UNGUICULATUS; VENTRAL COCHLEAR NUCLEUS; CAT STRIATE CORTEX; INFERIOR COLLICULUS; GABAERGIC INHIBITION; MONGOLIAN GERBIL; VISUAL-CORTEX; MOUSTACHE BAT; SINGLE UNITS; SIMPLE CELLS;
Keywords:
periodicity coding; microiontophoresis; bicuculline; GABA; Mongolian gerbil;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
78
Recensione:
Indirizzi per estratti:
Indirizzo: Schulze, H Leibniz Inst Neurobiol, Brenneckestr 6, D-39118 Magdeburg, Germany Leibniz Inst Neurobiol Brenneckestr 6 Magdeburg Germany D-39118
Citazione:
H. Schulze e G. Langner, "Auditory cortical responses to amplitude modulations with spectra above frequency receptive fields: evidence for wide spectral integration", J COMP PH A, 185(6), 1999, pp. 493-508

Abstract

Auditory neurons typically respond to a restricted range of frequencies and amplitudes of pure tone stimuli. These findings have led to the concept of the classical frequency receptive field. Over the last few years evidencehas accumulated that stimuli outside the frequency and amplitude boundaries of a neuron's receptive field can influence responses to stimuli inside the classical receptive field. We could recently show that sinusoidally amplitude-modulated pure tones could excite cortical neurons although all of their spectral components were above the spectral range of pure tones effective to excite the neuron. This result: demonstrated that neurons in the auditory cortex integrate over spectral ranges that are much wider than is evident from responses to pure tones. Here, using sinusoidally amplitude-modulated pure tone stimuli we determine electrophysiologically the high-frequency boundaries of the spectral integration capabilities of auditory cortical neurons in anaesthetized Mongolian gerbils under normal conditions and under the influence of the microiontophoretically applied GABAA-receptor antagonist bicuculline. Our results demonstrate that some auditory cortical neurons integrate over the gerbil's entire audible spectrum. Therefore, the classical excitatory frequency receptive field of an auditory cortical neuron, as determined with pure tone stimuli, cannot provide a satisfactory description of its spectral integrative properties.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/07/20 alle ore 14:39:17