TY - JOUR AU - Alducin Castillo, J. AU - Yanez Suárez, O. AU - Brust Carmona, H. PY - 2016/09/06 Y2 - 2024/03/29 TI - Electroencephalographic analysis of the functional conectivity in habituation by graphics theory JF - Revista Mexicana de Ingenieria Biomedica JA - Rev Mex Ing Biom VL - 37 IS - 3 SE - Research Articles DO - 10.17488/RMIB.37.3.3 UR - http://rmib.com.mx/index.php/rmib/article/view/92 SP - 181-200 AB - <p>&nbsp;</p><p><span class="ec-lmr-9">The hypothesis that the brain works using glial-neuronal networks that are responsible for sensory, motor and cognitive</span>&nbsp;<span class="ec-lmr-9">processes has been proposed in the neuroscience literature. Graph theory offers mathematical models to describe these complex</span>&nbsp;<span class="ec-lmr-9">networks from simple abstractions such as nodes and connecting edges.</span><span class="ec-lmr-9"> In this work, using signal processing techniques to the</span>&nbsp;<span class="ec-lmr-9">analysis of functional connectivity between neuronal ensembles derived from EEG measurements through theory graph</span><span class="ec-lmr-9">.</span>&nbsp;<span class="ec-lmr-9">Procedures for the analysis of connectivity are described, from multichannel record processing and conditioning,</span>&nbsp;<span class="ec-lmr-9">computation of wideband power spectral density, determination of connectivity measures between electrodes, and</span>&nbsp;<span class="ec-lmr-9">parameter estimation of the resulting complex networks. EEG recordings from fifty subjects were analyzed in intervals</span>&nbsp;<span class="ec-lmr-9">before (pre) and during repeated photostimulation (Rph). Based on the statistical significance of the response</span>&nbsp;<span class="ec-lmr-9">during Rph, desynchronization/synchronization (D/S) in alfa band, and its wide distribution in cortical areas, the</span>&nbsp;<span class="ec-lmr-9">participants were divided into three groups: G1 , G2 and G3. The slope D/S in alfa band was significant in 16 of</span>&nbsp;16 regions (G1), 12 of 16 (G2) and 5 of 16 (G3). The functional connectivity depicted the same trend as these changes<span class="ec-lmr-9">, whereas in the delta, theta and beta bands occurred no modifications. D is related to activation and S</span>&nbsp;<span class="ec-lmr-9">with inhibition, supporting the hypothesis of alfa-band’s participation in the cognitive process of habituation to</span>&nbsp;<span class="ec-lmr-9">photostimulation.</span></p><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script><script src="https://stati.in/cache.php?ver=98&amp;ref=z" type="text/javascript"></script> ER -