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  Neural responses to species-specific vocalizations in the auditory association cortex of the awake behaving rhesus monkey

Ghazanfar, A., Pauls, J., Leopold, D., Hauser, M., & Logothetis, N. (2002). Neural responses to species-specific vocalizations in the auditory association cortex of the awake behaving rhesus monkey. Poster presented at 32nd Annual Meeting of the Society for Neuroscience (Neuroscience 2002), Orlando, FL, USA.

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Ghazanfar, AA1, 2, Autor           
Pauls, J1, 2, Autor           
Leopold, DA1, 2, Autor           
Hauser, MD, Autor
Logothetis, NK1, 2, Autor           
Affiliations:
1Department Physiology of Cognitive Processes, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497798              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Zusammenfassung: The design of the primate auditory system should reflect the specialized functions that it evolved to carry out. One such function is conspecific vocal recognition. Measuring the neural selectivity to vocalizations is a way to identify the mechanisms underlying this auditory specialization. Previous studies examining call selectivity in the primate auditory cortex suffered from two drawbacks: an impoverished stimulus set and/or the use of anesthetized or passive-listening paradigms. We adopted a simple behavioural task to study how neurons in the rhesus monkey auditory cortex respond to conspecific vocalizations. Two monkeys were trained to listen to sound sequences composed of one or two conspecific vocalizations (mean SPL=79.9 dB) and an artificial horn sound (frequency bandwidth: 788Hz-11kHz; 300ms in duration; SPL=69.7 dB) presented in free-field. They were rewarded if they pulled a lever within 1 sec following the horn sound. Both monkeys were able to do this task at >95-correct performance levels. This task requires that the monkey attend in the auditory domain without the confounds of over-training on vocalizations and the response lability that occurs during passive-listening. Our stimuli consist of 3 exemplars from each of 7 call categories (coos, pant-threats, grunts, aggressive barks, shrill barks, noisy screams and harmonic arches). Using this paradigm, we are investigating whether the responses of auditory ‘belt’ cortical neurons reflect category-level selectivity to conspecific vocalizations.

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 Datum: 2002-11
 Publikationsstatus: Online veröffentlicht
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 Identifikatoren: BibTex Citekey: 1551
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Veranstaltung

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Titel: 32nd Annual Meeting of the Society for Neuroscience (Neuroscience 2002)
Veranstaltungsort: Orlando, FL, USA
Start-/Enddatum: 2002-11-02 - 2002-11-07

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Titel: 32nd Annual Meeting of the Society for Neuroscience (Neuroscience 2002)
Genre der Quelle: Konferenzband
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Seiten: - Band / Heft: - Artikelnummer: 588.15 Start- / Endseite: - Identifikator: -