Center for Biomedical Technology (CTB) GNU General Public License (GPL) Yes Technical University of Madrid (UPM) NITRC HERMES Yes MATLAB Here we present HERMES (http://hermes.ctb.upm.es), a toolbox for the Matlab® environment, which is designed to study functional and effective brain connectivity from neurophysiological data such as multivariate EEG and/or MEG records. It includes also visualization tools and statistical methods to address the problem of multiple comparisons. We believe that this toolbox will be very helpful to all the researchers working in the emerging field of brain connectivity analysis. HERMES Partial Directed Coherence, Transfer Entropy Analysis, EEG/MEG, Computational Neuroscience, Clinical Neuroinformatics, Directed Transfer Analysis, Granger Causality, GNU General Public License (GPL), MATLAB, Information Theory, Attention Deficit Disorder with Hyperactivity, Schizophrenia, Epilepsy, Stroke, Alzheimer Disease http://dev.nitrcce.org/projects/hermes/, http://hermes.ctb.upm.es/