Watching a living brain in the act of seeing -- with single-synapse resolution

Scientists report evidence that individual neurons carry out significant aspects of visual processing. Their novel microscopy method makes it possible to observe individual synapses on a single neuron in a living mammalian brain. Focusing on neurons involved in processing movement-related signals, they discovered that an individual neuron integrates inputs from many synapses into a single output -- a decision, in essence, made by a single nerve cell.

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