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Stimulus-invariant processing and spectrotemporal reverse correlation in primary auditory cortex



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J Comput Neurosci 2006 20 111 136 DOI 10 1007 s10827 005 3589 4 Stimulus invariant processing and spectrotemporal reverse correlation in primary auditory cortex David J Klein Jonathan Z Simon Didier A Depireux Shihab A Shamma Received 29 September 2004 Revised 5 June 2005 Accepted 12 July 2005 Published online 20 February 2006 C Springer Science Business Media LLC 2006 Abstract The spectrotemporal receptive field STRF provides a versatile and integrated spectral and temporal functional characterization of single cells in primary auditory cortex AI In this paper we explore the origin of and relationship between different ways of measuring and analyzing an STRF We demonstrate that STRFs measured using a spectrotemporally diverse array of broadband stimuli such as dynamic ripples spectrotemporally white noise and temporally orthogonal ripple combinations TORCs are very similar confirming earlier findings that the STRF is a robust linear descriptor of the cell We also present a new deterministic analysis framework that employs the Fourier series to describe the spectrotemporal modulations contained in the stimuli and responses Additional insights into the Action Editor Mathew Wiener D J Klein D A Depireux S A Shamma Institute for Systems Research University of Maryland College Park MD 20742 USA e mail djklein isr umd edu D J Klein J Z Simon S A Shamma Department of Electrical and Computer Engineering University of Maryland College Park MD 20742 USA J Z Simon Department of Biology University of Maryland College Park MD 20742 USA D A Depireux Department of Anatomy and Neurobiology University of Maryland Baltimore MD 21201 USA D J Klein Institute for Neuroinformatics University ETH Zu rich 8057 Zu rich Switzerland STRF measurements including the nature and interpretation of measurement errors is presented using the Fourier transform coupled to singular value decomposition SVD and variability analyses including bootstrap The results promote the utility of the STRF as a core



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