My research focuses on trying to index neural circuit activity in the human brain, to allow cognitive function to be understood at a mechanistic level. I investigate how memories are stored and recalled, with particular interest in the interaction between the hippocampus and neocortex, and the role of inhibition. Using a multi-modal approach I use non-invasive tools such as fMRI and MR spectroscopy to obtain a coarse read-out of neural processes. I then compare this with the equivalent microscopic descriptions obtained using multi-channel extracellular recordings and optogenetic manipulations. My work is based at the MRC Brain Network Dynamics Unit, and I am also a member of the Wellcome Centre for Integrative Neuroimaging.