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. 2016 Jun 20;10:261. doi: 10.3389/fnins.2016.00261

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Copyright © 2016 Guhathakurta and Dutta.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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(A) NIRS probe placement along the arc joining Cz and F3 scalp locations with the optode source (labeled “1”) 1.5 cm toward Cz from FC1 (labeled “4”) and short separation (labeled “2”) and long separation (labeled “3”) detectors are 8 mm and 3 cm toward F3 from optode source (i.e., labeled “1”). (B) Measurement sensitivity distribution of NIRS probe at gray matter surface that covers primarily middle frontal and superior frontal gyrus.