Fast, stealthy, and cheap--autonomous, semisubmersible drone boats carrying tons of cocaine could be international law enforcement's nightmare scenario. A big one just came ashore. Colombian military officials intercepted this 40-foot-long uncrewed fiberglass "narco sub" in the ocean just off Tayrona National Park. On a bright morning last April, a surveillance plane operated by the Colombian military spotted a 40-foot-long shark-like silhouette idling in the ocean just off Tayrona National Park. It was, unmistakably, a "narco sub," a stealthy fiberglass vessel that sails with its hull almost entirely underwater, used by drug cartels to move cocaine north. The plane's crew radioed it in, and eventually nearby coast guard boats got the order, routine but urgent: Intercept. In Cartagena, about 150 miles from the action, Captain Jaime González Zamudio, commander of the regional coast guard group, sat down at his desk to watch what happened next.

Recent progress in the development of voltage indicators [1-8] has brought us closer to a longstanding goal incellular neuroscience: imaging the full spatiotemporal voltageonadendritic tree. These recordings have the potential (pun not intended) to resolve fundamental questions about the computations performed by dendrites -- questions that have remained open for more than a century[9,10].

Neural Information Processing Systems http://nips.cc/

Modern recording techniques now allow us to record from distinct neuronal populations in different brain networks.

Neural Information Processing Systems http://nips.cc/

Here we give a general decription of the model. Complete versions of the dendritic update rules (summarised in Eqns (2) & (3)) are given below. The notation we're using admits the possible presence of biases as well as the weights (though biases typically aren't's could be added to the synaptic inputs effectively absorbing a We update the layers from bottom to top: first we update the latent or "environment" and increment Learning rules are conceptually summarised by the equations given in the main text, Eqn (6). If the prediction error and one of the presynaptic inputs are both consistently large (i.e. over a We add synaptic noise to the dendritic activations. Hz in order that noise is relatively slow and weak.