AP PSYCHOLOGY

Detailed explanation-1: -Researchers believe that both depression and suicidal behavior can be linked to decreased serotonin in the brain.

Detailed explanation-2: -Studies of the brain of suicide victims indicate there is a decrease in brain stem levels of 5-HT and/or 5-HIAA. There also appears to be a region-specific increase in 5-HT2 receptors, which are post synaptic and may therefore be increased in number secondary to decreased serotonin levels.

Detailed explanation-3: -When serotonin is at normal levels, you feel more focused, emotionally stable, happier and calmer. Low levels of serotonin are associated with depression. Many medications used to treat anxiety, depression and other mood disorders often target ways to increase the level of serotonin in your brain.

Detailed explanation-4: -In addition to depression, serotonin may play a role in other brain and mental health disorders, including anxiety disorder, obsessive-compulsive disorder (OCD), post-traumatic stress disorder (PTSD), phobias, and even epilepsy.

Detailed explanation-5: -Significantly low levels of serotonin and the neurotransmitter metabolite (5-HIAA) may be correlated with suicidal behavior.