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High-probability grants
According to our matching algorithm, Yigal Agam is the likely recipient of the following grants.
Years |
Recipients |
Code |
Title / Keywords |
Matching score |
2009 — 2012 |
Agam, Yigal N |
F32Activity Code Description: To provide postdoctoral research training to individuals to broaden their scientific background and extend their potential for research in specified health-related areas. |
Multimodal Studies of Executive Function Deficits in Autism Spectrum Disorders @ Massachusetts General Hospital
DESCRIPTION (provided by applicant): Autism spectrum disorders (ASD) are characterized by deficits in executive functions, an umbrella term for cognitive processes that enable flexible, goal-directed behavior. We propose to study the neural basis of deficits in two important executive functions: Inhibition and task-switching. We will use an antisaccade paradigm in which ASD patients consistently show performance deficits. We hypothesize that participants with ASD will show abnormal task preparation, as indexed by reduced frontal eye field and anterior cingulate activity in preparation to antisaccade trials compared to prosaccade and No-GO trials and during a task-switch between prosaccade, antisaccade and No-Go trials. We also hypothesize that deficient task preparation will be related to diagnostic ratings of restricted, repetitive behaviors, one of the hallmarks of ASD. In this multimodal project, we will combine the spatial precision of event-related functional magnetic resonance imaging (fMRI) with the high temporal resolution of magnetoencephalography (MEG) and electroencephalography (EEG) to identify the regions involved and the timing of their contribution at various stages of antisaccade performance. Since executive functions are the product of coordinated activity across a distributed network, we will also assess the functional connectivity of the anatomical components of these networks using fMRI and the integrity of white matter tracts that connect them using Diffusion Tensor Imaging (DTI). Together, these methods will identify functional and structural neural correlates of abnormal executive function in ASD that contribute to a disabling symptom - restricted and repetitive behavior. The findings can guide the search for neuropathology and provide targets for intervention in ASD. In order to adapt to the environment, it is necessary to suppress inappropriate behaviors and use contextual cues. Brain networks that are critical for flexible control of behavior are compromised in Autism Spectrum Disorders, and this likely contributes to restricted, repetitive, and maladaptive patterns of behavior. Using complementary neuroimaging techniques, this research will identify the neural basis of cognitive dysfunction that gives rise to restricted, repetitive behavior in Autism Spectrum Disorders. The findings will guide investigations of neuropathology and provide targets for intervention to improve function.
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