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Erschienen in: Brain Topography 3/2015

01.05.2015 | Original Paper

A New and Fast Characterization of Multiple Encoding Properties of Auditory Neurons

verfasst von: Boris Gourévitch, Florian Occelli, Quentin Gaucher, Yonane Aushana, Jean-Marc Edeline

Erschienen in: Brain Topography | Ausgabe 3/2015

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Abstract

The functional properties of auditory cortex neurons are most often investigated separately, through spectrotemporal receptive fields (STRFs) for the frequency tuning and the use of frequency sweeps sounds for selectivity to velocity and direction. In fact, auditory neurons are sensitive to a multidimensional space of acoustic parameters where spectral, temporal and spatial dimensions interact. We designed a multi-parameter stimulus, the random double sweep (RDS), composed of two uncorrelated random sweeps, which gives an easy, fast and simultaneous access to frequency tuning as well as frequency modulation sweep direction and velocity selectivity, frequency interactions and temporal properties of neurons. Reverse correlation techniques applied to recordings from the primary auditory cortex of guinea pigs and rats in response to RDS stimulation revealed the variety of temporal dynamics of acoustic patterns evoking an enhanced or suppressed firing rate. Group results on these two species revealed less frequent suppression areas in frequency tuning STRFs, the absence of downward sweep selectivity, and lower phase locking abilities in the auditory cortex of rats compared to guinea pigs.
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Metadaten
Titel
A New and Fast Characterization of Multiple Encoding Properties of Auditory Neurons
verfasst von
Boris Gourévitch
Florian Occelli
Quentin Gaucher
Yonane Aushana
Jean-Marc Edeline
Publikationsdatum
01.05.2015
Verlag
Springer US
Erschienen in
Brain Topography / Ausgabe 3/2015
Print ISSN: 0896-0267
Elektronische ISSN: 1573-6792
DOI
https://doi.org/10.1007/s10548-014-0375-5

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