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.

Male rodents exposed to nicotine had changes in sperm genome methylation and produced pups and grandpups with abnormal behavior.

Researchers have identified what makes synapses strong or weak in fruit flies.

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

Researchers unveil the neural basis of alertness in larval zebrafish.   

The Dartmouth College professor uses optogenetics to probe the neurological routes of habitual behavior.

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

Impairments in the production of neurotransmitters may lead to depression in some patients, preliminary results show, opening new avenues for research.