Detection of silent gaps in white noise following cortical deactivation in rats.

Detection of silent gaps in white noise following cortical deactivation in rats. Research Abstract Details 

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Detection of silent gaps in white noise following cortical deactivation in rats. Abstract Text:

Rodent studies using cortical removal techniques, ranging from transient deactivation to surgical ablation of cortex, reveal the importance of auditory cortical integrity in detecting short silent gaps in white noise (2-15 ms). Processing limits for longer gaps under decorticate conditions in rats remain unknown. Determining the temporal threshold for subcortical resolution of gaps in noise could, however, shed light on both normal hierarchical processing of acoustic temporal stimuli, as well as the etiology of processing anomalies following developmental cortical disruption. To address these important issues, we assessed whether intact rats, as well as those with induced developmental cortical disruptions (microgyria) could resolve silent gaps of 20-100 ms in duration when embedded in white noise, during functional deactivation of auditory cortex. Results showed that both intact rats, as well as those with cortical malformations resulting from early focal disruptions of neuronal migration could resolve silent gaps of 100-ms duration under cortical deactivation (KCl). However, only intact rats could reliably detect 75-ms gaps, suggesting possible subcortical anomalies in subjects with early cortical disturbances.

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Detection of silent gaps in white noise following cortical deactivation in rats. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Neuroreport

VOLUME: 19

Page Numbers: 893-8

Journal Abbreviation: Neuroreport

ISSN: 0959-4965

DAY: 28

MONTH: May

YEAR: 2008

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LANGUAGE: eng

NlmUniqueID: 9100935

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Grant and Affiliation Information for Detection of silent gaps in white noise following cortical deactivation in rats.

AFFILIATION: aDepartment of Psychology, Behavioral Neuroscience Division, University of Connecticut, Storrs, Connecticut bDepartment of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA.

Country: England

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