Major depressive disorder | bipolar disorder | obsessive-compulsive disorder | Disorder in the Court | Borderline personality disorder | Bipolar disorder | Substance use disorder | Dissociative identity disorder | Congenital disorder | Attention Deficit Hyperactivity Disorder | Vision of Disorder | Social anxiety disorder | Posttraumatic stress disorder | Narcissistic personality disorder | antisocial personality disorder | pervasive developmental disorder | Obsessive–compulsive disorder | major depressive disorder | Esophageal motility disorder | eating disorder | dissociative identity disorder | conversion disorder | Attention deficit hyperactivity disorder | Vision of Disorder's | Speech disorder | Somatization disorder | social anxiety disorder | Sleep disorder | sleep disorder | sensory processing disorder |
In 1984, Norman E. Rosenthal, a psychiatrist and NIMH researcher, pioneered seasonal affective disorder, coined the term SAD, and began studying the use of light therapy as a treatment.
Vintersorg means "Winter Sorrow," but the name was taken from the The Legend of the Ice People series by Margit Sandemo, where the character Vintersorg is the son of a great pagan leader.