Summary: Researchers have identified orexin, a brain chemical, as crucial in deciding between exercising and indulging in treats. In experiments with mice, those with an intact orexin system were more…
Tag: orexin
Pupil Size Regulated by Orexin, Not Stress Hormones
Summary: Researchers have discovered that the neurotransmitter orexin, not the stress hormone noradrenaline, regulates pupil size, challenging prior understanding. Orexin neurons affect pupil size in response to emotional states and…
