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Abstract #0228

Reorganization of functional networks in squirrel monkey brain after thalamic injury and their relations to task-specific behaviors

Anirban Sengupta1, Daniela Hernandez Duque1, Arabinda Mishra1, Jamie L Reed1, Pai-Feng Yang1, Feng Wang1, Zhangyan Yang1, Li Min Chen2, and John C Gore1
1Vanderbilt University Medical Center, Nashville, TN, United States, 2Vanderbilt University Medical Center, NASHVILLE, TN, United States

Synopsis

Keywords: Brain Connectivity, Brain, Thalamus lesion

Resting state fMRI was used to assess whole brain functional networks before and after a targeted, unilateral lesion in the hand and arm representation of the ventroposterior lateral nucleus of the thalamus of squirrel monkeys. Using Independent Component Analysis, the overall whole brain resting state functional connectivity (rsFC) dropped after injury but slowly recovered. The trajectory of network changes corresponded well with quantitative metrics of animal performance on a behavioral task using the affected hand. Some functional networks showed reductions in connectivity post injury followed by recoveries while others reflected compensatory increases that began in the first week after injury.

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Keywords