Attention-deficit/hyperactivity disorder (previously known as attention deficit disorder or ADD) is a neurobehavioral disorder characterized by core symptoms of inattentiveness, distractibility, hyperactivity, and impulsivity. ADHD is thought to be the most common childhood mental health disorder, with estimates of its prevalence in children ranging from 5 to 11 percent. ADHD in adulthood is thought to be less common, with approximately 2 to 5 percent of adults diagnosed.| Psychology Today
Psychopharmacology is the study of substances that influence mental states. Such agents induce changes in mood, sensation, thinking, or behavior, and may be derived from plants or other natural sources or chemically synthesized in a laboratory. Psychopharmacology encompasses medications used in the treatment of such conditions as depression, anxiety, and psychosis. It also includes agents that relieve acute and chronic pain, and others that curb insomnia and facilitate sleep.| Psychology Today
Motivation is the desire to act in service of a goal. It's the crucial element in setting and attaining our objectives. Motivation is one of the driving forces behind human behavior. It fuels competition and sparks social connection. Its absence can lead to mental illnesses such as depression. Motivation encompasses the desire to continue striving toward meaning, purpose, and a life worth living.| Psychology Today
Gratitude is the expression of appreciation for what one has. It is a recognition of value independent of monetary worth. Spontaneously generated from within, it is an affirmation of goodness and warmth. This social emotion strengthens relationships, and its roots run deep in evolutionary history—emanating from the survival value of helping others and being helped in return. Studies show that specific areas of the brain are involved in experiencing and expressing gratitude.| Psychology Today
"The grey drizzle of horror," author William Styron memorably called depression. The mood disorder may descend seemingly out of the blue, or it may come on the heels of a defeat or personal loss, producing persistent feelings of sadness, worthlessness, hopelessness, helplessness, pessimism, or guilt.| Psychology Today