| Communication call-evoked gamma-band activity in the auditory cortex of awake bats is modified by complex acoustic features. | |
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MedLine Citation:
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PMID: 18054896 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Mustached bats emit an acoustically rich variety of calls for social communication. In the posterior primary auditory cortex, activity of neural ensembles measured as local field potentials (LFPs) can uniquely encode each call type. Here we report that LFPs recorded in response to calls contain oscillatory activity in the gamma-band frequency range (>20 Hz). The power spectrum of these high-frequency oscillations shows either two peaks of energy (at 40 Hz and 100 Hz), or just one peak at 40 Hz. The relative power of gamma-band activity in the power spectrum of a call-evoked LFP correlates significantly with the 'harmonic complexity' of a call. Gamma-band activity is attenuated with reversal of frequency-modulated calls. Amplitude modulation, even when asymmetric across call reversals, has no significant effect on gamma-band activity. These results provide the first experimental evidence that complex features within different groups of species-specific calls modify the power spectrum of evoked gamma-band activity. |
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Authors:
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Andrei V Medvedev; Jagmeet S Kanwal |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2007-11-04 |
Journal Detail:
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Title: Brain research Volume: 1188 ISSN: 0006-8993 ISO Abbreviation: Brain Res. Publication Date: 2008 Jan |
Date Detail:
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Created Date: 2007-12-24 Completed Date: 2008-06-02 Revised Date: 2009-11-18 |
Medline Journal Info:
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Nlm Unique ID: 0045503 Medline TA: Brain Res Country: Netherlands |
Other Details:
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Languages: eng Pagination: 76-86 Citation Subset: IM |
Affiliation:
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Dept. of Physiology and Biophysics, Georgetown University Medical Center, Washington, DC 20057-1460, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Acoustic Stimulation Action Potentials / physiology Animals Auditory Cortex / anatomy & histology, physiology* Auditory Perception / physiology* Behavior, Animal / physiology Biological Clocks / physiology* Chiroptera / anatomy & histology, physiology* Echolocation / physiology Electrophysiology Evoked Potentials, Auditory / physiology* Signal Processing, Computer-Assisted Social Behavior Species Specificity Vocalization, Animal / physiology* Wakefulness |
| Grant Support | |
ID/Acronym/Agency:
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R01 DC 02054/DC/NIDCD NIH HHS; R01 DC002054-08S1/DC/NIDCD NIH HHS; R01 DC002054-09/DC/NIDCD NIH HHS |
| Comments/Corrections | |
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