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The habenula is a tiny brain region the size of a pea in humans. This region is highly conserved across vertebrates and has been traditionally overlooked by neuroscientists. The name habenula is derived from the Latin word habena, meaning “little rein”, because of its elongated shape. Originally its function was thought to be related to the regulation of the nearby pineal gland (which Rene Descartes...
The recent advent of technologies enabling cell-type-specific recording and manipulation of neuronal activity spurred tremendous progress in neuroscience. However, they have been largely limited to mice, which lack the richness in behavior of primates. Stauffer et al. now present a generalizable method for achieving cell-type specificity in monkeys.
Most behaviors are generated in three steps: sensing the external world, processing that information to instruct decision-making, and producing a motor action. Sensory areas, especially primary sensory cortices, have long been held to be involved only in the first step of this sequence. Here, we develop a visually cued interval timing task that requires rats to decide when to perform an action following...
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