For many, finding the motivation to start and sustain an exercise regimen is like the search for the holy grail. Despite countless attempts to find their way to regular physical activity, Americans ...

Someone suffering from stress or mental health problems may suddenly feel lazy or hesitant to do the most basic things.

Hunger can drive a motivational state that leads an animal to a successful pursuit of a goal -- foraging for and finding food. In a highly novel study, researchers describe how two major neuronal ...