I am pleased to share with you our findings on the flexibility of hippocampal circuits to rapidly encode arbitrary patterns. biorxiv.org/content/10.110…. A great collaborative effort with @englishdanielf, the uLED team at UM, and Roman Huszar and of course, Gyuri Buzsaki. @englishdanielf We were inspired by Magee and Burgalossi who showed that stimulating a hippocampal neuron induced place field. We wanted to see if this works with opto and to stimulate ensembles to see if they replay together and with the existing fields– simple enough hypotheses.