Octopamine, a relative of adrenaline, is traditionally thought to act as the signal for reward in Drosophila melanogaster and other insects. Recent studies, however, have suggested a role for dopamine ...

Angry ants Soldier or nurse? Worker roles in Australian green tree ant society are influenced by a chemical in the tiny insect's brain. Differences in the levels of the chemical octopamine in the ...

The antidepressant mianserin can extend the lifespan of the the roundworm by about 30 percent. The drug may act by mimicking the effects of caloric restriction, which has been shown to retard the ...

CHAMPAIGN, Ill. — In a study that challenges current ideas about the insect brain, researchers have found that honey bees on cocaine tend to exaggerate. Normally, foraging honey bees alert their ...

Internal states that animals experience while they are thirsty, hungry, sleepy or aggressive have been found to be linked with the combined activity of various neuromodulators and neurotransmitters.