HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Citation Map Services Email this article to a friend Similar articles in this journal Similar articles in Web of Science Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Web of Science (24) Citing Articles via Google Scholar Google Scholar Articles by Tian, B. Articles by Rauschecker, J. P. Search for Related Content PubMed PubMed Citation Articles by Tian, B. Articles by Rauschecker, J. P.

Processing of Frequency-Modulated Sounds in the Lateral Auditory Belt Cortex of the Rhesus Monkey

Department of Physiology and Biophysics, Georgetown University School of Medicine, Washington, DC 20057

Submitted 16 May 2003; accepted in final form 10 May 2004

Single neurons were recorded from the lateral belt areas, anterolateral (AL), mediolateral (ML), and caudolateral (CL), of nonprimary auditory cortex in 4 adult rhesus monkeys under gas anesthesia, while the neurons were stimulated with frequency-modulated (FM) sweeps. Responses to FM sweeps, measured as the firing rate of the neurons, were invariably greater than those to tone bursts. In our stimuli, frequency changed linearly from low to high frequencies (FM direction "up") or high to low frequencies ("down") at varying speeds (FM rates). Neurons were highly selective to the rate and direction of the FM sweep. Significant differences were found between the 3 lateral belt areas with regard to their FM rate preferences: whereas neurons in ML responded to the whole range of FM rates, AL neurons responded better to slower FM rates in the range of naturally occurring communication sounds. CL neurons generally responded best to fast FM rates at a speed of several hundred Hz/ms, which have the broadest frequency spectrum. These selectivities are consistent with a role of AL in the decoding of communication sounds and of CL in the localization of sounds, which works best with broader bandwidths. Together, the results support the hypothesis of parallel streams for the processing of different aspects of sounds, including auditory objects and auditory space.

This article has been cited by other articles:

				K. A. Razak and Z. M. Fuzessery GABA Shapes Selectivity for the Rate and Direction of Frequency-Modulated Sweeps in the Auditory Cortex J Neurophysiol, September 1, 2009; 102(3): 1366 - 1378. [Abstract] [Full Text] [PDF]

				P. Kusmierek and J. P. Rauschecker Functional Specialization of Medial Auditory Belt Cortex in the Alert Rhesus Monkey J Neurophysiol, September 1, 2009; 102(3): 1606 - 1622. [Abstract] [Full Text] [PDF]

				J. K. Bizley and K. M. M. Walker Distributed Sensitivity to Conspecific Vocalizations and Implications for the Auditory Dual Stream Hypothesis J. Neurosci., March 11, 2009; 29(10): 3011 - 3013. [Full Text] [PDF]

				S. D. Washington and J. S. Kanwal DSCF Neurons Within the Primary Auditory Cortex of the Mustached Bat Process Frequency Modulations Present Within Social Calls J Neurophysiol, December 1, 2008; 100(6): 3285 - 3304. [Abstract] [Full Text] [PDF]

				K. A. Razak and Z. M. Fuzessery Facilitatory Mechanisms Underlying Selectivity for the Direction and Rate of Frequency Modulated Sweeps in the Auditory Cortex J. Neurosci., September 24, 2008; 28(39): 9806 - 9816. [Abstract] [Full Text] [PDF]

				L. Qin, J. Wang, and Y. Sato Heterogeneous Neuronal Responses to Frequency-Modulated Tones in the Primary Auditory Cortex of Awake Cats J Neurophysiol, September 1, 2008; 100(3): 1622 - 1634. [Abstract] [Full Text] [PDF]

				P. K. Pandya, D. L. Rathbun, R. Moucha, N. D. Engineer, and M. P. Kilgard Spectral and Temporal Processing in Rat Posterior Auditory Cortex Cereb Cortex, February 1, 2008; 18(2): 301 - 314. [Abstract] [Full Text] [PDF]

				B. E. Russ, A. L. Ackelson, A. E. Baker, and Y. E. Cohen Coding of Auditory-Stimulus Identity in the Auditory Non-Spatial Processing Stream J Neurophysiol, January 1, 2008; 99(1): 87 - 95. [Abstract] [Full Text] [PDF]

				J. Upadhyay, M. Ducros, T. A. Knaus, K. A. Lindgren, A. Silver, H. Tager-Flusberg, and D.-S. Kim Function and Connectivity in Human Primary Auditory Cortex: A Combined fMRI and DTI Study at 3 Tesla Cereb Cortex, October 1, 2007; 17(10): 2420 - 2432. [Abstract] [Full Text] [PDF]

				C. Kayser, C. I. Petkov, M. Augath, and N. K. Logothetis Functional Imaging Reveals Visual Modulation of Specific Fields in Auditory Cortex J. Neurosci., February 21, 2007; 27(8): 1824 - 1835. [Abstract] [Full Text] [PDF]

				K. A. Razak and Z. M. Fuzessery Neural Mechanisms Underlying Selectivity for the Rate and Direction of Frequency-Modulated Sweeps in the Auditory Cortex of the Pallid Bat J Neurophysiol, September 1, 2006; 96(3): 1303 - 1319. [Abstract] [Full Text] [PDF]

				K. N. O'Connor, C. I. Petkov, and M. L. Sutter Adaptive Stimulus Optimization for Auditory Cortical Neurons J Neurophysiol, December 1, 2005; 94(6): 4051 - 4067. [Abstract] [Full Text] [PDF]