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Neuroscience 2001 Abstract
| Presentation Number: |
724.11 |
| Abstract Title: |
DIFFERENTIAL RESPONSES OF AUDITORY CORTEX NEURONS TO NATURAL AND UNNATURAL VOCALIZATIONS IN ALERT MACACA MULATTA. |
| Authors: |
Tramo, M. J.*1;
Rosenbaum, E. R.1,3;
Cariani, P. A.2;
Hauser, M. D.3
1Neurology, Harvard University, Boston, MA
2Otology & Laryngology, Harvard University, Boston, MA
3Psychology, Harvard University, Boston, MA
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| Primary Theme and Topics |
Sensory Systems
- Auditory
-- Central Physiology
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| Session: |
724. Auditory: coding, tuning and perception
Poster |
| Presentation Time: |
Wednesday November 14, 2001 10:00 AM-11:00 AM |
| Location: |
Convention Center Exhibit Hall, Poster Board V-3 |
| Keywords: |
Auditory Physiology, Neural Coding, Speech Perception, Macaque Monkeys
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Behavioral studies indicate that rhesus monkeys manifest differential head-orienting responses to natural vocalizations and to synthetic derivatives with acoustic features lying outside natural boundaries. We recorded the responses of single neurons and neuron clusters in the core area of left auditory cortex to two classes of pulsatile calls: grunts and shrill barks. For each type of call, we synthesized two sets of stimuli: 1) calls with interpulse intervals (IPIs) typical of natural calls that elicit rightward head-orienting (R-calls); and 2) calls with unnatural IPIs that do not elicit rightward head-orienting (X-calls). We tested whether neuronal responses to R-calls differed from responses to X-calls.
Pair-wise correlations between the post-stimulus time histograms (PSTHs) of responses to different R-calls were higher than pair-wise correlations between the PSTHs of responses to R-calls and X-calls with unnaturally long IPI's (Wilcoxon rank sum across cells, p<0.05). In addition, average discharge rates differed between R-calls and X-calls for most of our neurons (p<0.05). This difference was attributable to either higher or lower discharge rates for R-calls. There was no difference in peak discharge rates between R-calls and X-calls.
Differences in temporal discharge patterns, rather than increases in discharge rates, may signal behaviorally-relevant differences among vocalizations in the core area of rhesus monkey auditory cortex.
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| Supported by DC03382 (MJT), DC03054 (PAC), & the McDonnell-Pew Program in Cognitive Neuroscience (MJT). |
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| Sample Citation: |
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[Authors]. [Abstract Title]. Program No. XXX.XX. 2001 Neuroscience Meeting Planner. San Diego, CA: Society for Neuroscience, 2001. Online.
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| Copyright © 2001-2010 Society for Neuroscience; all rights reserved. Permission to republish any abstract or part of any abstract in any form must be obtained in writing by SfN office prior to publication.
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