In a first-of-its-kind study, researchers monitored subsecond changes in levels of the neurotransmitters in the human brain, unlocking new insight into their function.

Affectionate touches tap into the nervous system’s rest and digest mode, reducing the release of stress hormones, bolstering the immune system, and stimulating brainwaves linked with relaxation.

Clues about the biological mechanisms that contribute to a person’s chance of contemplating or attempting suicide

The biochemical mechanisms in the brain underlying suicidal behavior are beginning to come to light, and researchers hope they could one day lead to better treatment and prevention strategies.

Inhibiting nerve cells that produce the neurotransmitter made it harder for baby mice to recover from bouts of slowed breathing.

Inflammation may be a strong contender for the connection between mom’s weight and children’s neurodevelopment, according to lab studies on animals.

Just as in people, the drug stimulates the animals to behave more socially.

Host slugs given Prozac to increase their serotonin levels no longer avoid parasitic nematodes, the same behavior seen in infected slugs.

One-third of babies who died of SIDS had higher-than-normal levels of the neurotransmitter in their blood serum, according to a study. 

Activating serotonin receptors halts a binge-like eating behavior in mice, researchers report.

Serotonin’s long-debated role in sleep promotion is temperature-dependent.

Reduction in telomere length is associated with stress early on in life and may have a genetic component, researchers find.

Deficiencies in a cellular motor that carries a serotonin receptor are associated with anxiety in mice.

The mother of disabled twins doggedly pursued the root of her children's illness and found it in their genome profiles.