News Story

Shamma receives NIH grant to study spectro-temporal plasticity in the brain's neuronal networks

Shamma receives NIH grant to study spectro-temporal plasticity in the brain's neuronal networks

Professor Shihab Shamma (ECE/ISR) is the principal investigator for a new grant from the National Institutes of Health's National Institute on Deafness and Other Communication Disorders. The one-year, $320K grant is titled, "Spectro-Temporal Plasticity in Primary Auditory Cortex."

Auditory experience can reshape cortical maps and transform receptive field properties of neurons in the auditory cortex. The exact form of this plasticity depends on the behavioral context, and the spectrotemporal features of the salient acoustic stimuli. Neuroscientists believe that auditory cortical cells may undergo rapid, context-dependent changes of their receptive field properties when different auditory behavioral tasks are undertaken. This kind of plasticity would likely involve a selective functional reshaping of the underlying cortical circuitry to sculpt the most effective receptive field for accomplishing the current auditory task.

Shamma and his research team will explore the underlying mechanisms that give rise to this extraordinary functional plasticity. They will extend studies of task-related plasticity in the auditory cortex to a variety of new tasks involving speech stimuli, new behavioral paradigms (contrasting discrimination versus recognition). They will explore plasticity in higher-order auditory cortical fields, and investigate the possible role of top-down signals from frontal cortex in modulating adaptive plasticity in the auditory cortex.

The researchers will test the hypothesis that frontal cortical neurons encode task rules, expectancies, goals and the task-related meaning of acoustic stimuli. They will also test the idea that top-down influences from frontal areas contribute to the induction of rapid adaptive plasticity in the auditory cortex during auditory tasks, reflecting both the nature of the stimuli and goals of the tasks. Preliminary studies from simultaneous neuronal recordings of single units and local field potentials in the auditory and frontal cortex have already led to exciting new insights, and may lead to progress in understanding the interactions within an extended neuronal network that give rise to adaptive plasticity.

Related Articles:
UMD neuroscience researchers publish in the journal Neuron
Maryland researchers develop computational approach to understanding brain dynamics
Chapin, Bowen win in Bioscience Day poster session
New Perspectives on Some of the Oldest Questions about Human Language
NIH announces HEAL Initiative Grants for UMD faculty
AESoP symposium features speakers, organizers with UMD ties
Shamma, colleagues publish in Journal of Neuroscience
NSF Awards $1M Grant to UMD Researchers
UMD researchers awarded $5.3M NIH BRAIN Initiative grant
Radio interview with Jonathan Simon on "the cocktail party problem"

July 1, 2014


Prev   Next

Current Headlines

Chapin, Bowen win in Bioscience Day poster session

New Perspectives on Some of the Oldest Questions about Human Language

NIH announces HEAL Initiative Grants for UMD faculty

AESoP symposium features speakers, organizers with UMD ties

Shamma, colleagues publish in Journal of Neuroscience

UMD Researchers Develop Technique to Advance Cell-Based Systems

Special Delivery

NSF Awards $1M Grant to UMD Researchers

News Resources

Return to Newsroom

Search News

Archived News

Events Resources

Events Calendar