Open AccessIncreased prefrontal cortex connectivity during cognitive challenge assessed by fNIRS imaging
Author(s) -
Frigyes Samuel Racz,
Péter Mukli,
Zoltán Zsolt Nagy,
András Eke
Publication year - 2017
Publication title -
biomedical optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.362
H-Index - 86
ISSN - 2156-7085
DOI - 10.1364/boe.8.003842
Subject(s) - functional near infrared spectroscopy , prefrontal cortex , resting state fmri , cognition , neuroscience , neuroimaging , functional connectivity , psychology , cognitive psychology
In this study, functional near-infrared spectroscopy (fNIRS) and the graph theory approach were used to access the functional connectivity (FC) of the prefrontal cortex (PFC) in a resting state and during increased mental workload. For this very purpose, a pattern recognition-based test was developed, which elicited a strong response throughout the PFC during the test condition. FC parameters obtained during stimulation were found increased compared to those in a resting state after correlation based signal improvement (CBSI), which can attenuate those components of fNIRS signals which are unrelated to neural activity. These results indicate that the cognitive challenge increased the FC in the PFC and suggests a great potential in investigating FC in various cognitive states.