Samuel Antonio Montero Hernández

The brain is one of the most complex dynamic system in the nature. Typically, the connectivity in the brainis studied in three different levels: anatomical, functional,and effective connectivity. The anatomical connectivityaddress the physicallinks among neuronal population. The functional connectivityis interested in determining the dependencies between brain regions. And, effective connectivityis concerned to the study of the influence of one region over another by determining the causal direction of such influence. The aim of this work is to determine the set of effective connectivity networks(ECN)while a group of subjects performa set of specific tasksand their brain activity is monitored with a functional near-infrared spectroscopy neuroimaging machine.

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