Since their simultaneous discovery by two groups 1,2, orexin/hypocretin neurons have been implicated in numerous functions, including regulating sleep/wake cycles, arousal, reward seeking, cognition, ...

Bill-wiping, or the scraping by a bird of its bill along a substrate, has been observed in social contexts and cited as an irrelevant displacement activity. However, several behaviors once categorized ...

How is an animal's internal life (i.e., its physiology and anatomy) integrated with its behavior? Sensory systems provide information from outside the animal that, when integrated, shape behavior.