Glossary: T-Z

thyroid : A gland in the neck that produces hormones responsible for regulating metabolism and many other bodily systems.

transcranial magnetic stimulation: A safe, non-invasive treatment for depression that uses a powerful, pulsed magnetic field to stimulate activity in targeted areas of the brain.

trauma: Physical or emotional damage caused by physical injury or extreme emotional stress.

tricyclic antidepressants: An early class of antidepressants that act on three brain transmitters: serotonin, norepinephrine and dopamine.

twin study: A scientific investigation of a group of identical and fraternal twins. Twin studies look for similarities in regards to a trait or disease in order to study the link between the trait or disease and genetic makeup.

tyramine: A monoamine that affects adrenaline and blood pressure.

vagus nerve stimulation: A treatment that sends mild electrical pulses to the brain through the vagus nerve via a small, round battery that is surgically implanted into the chest wall. This method is intended to stimulate mood centers in the brain.

yoga: A discipline, originating in ancient India, which combines meditation with exercise for mental and physical health benefits.