The DSM-5, text revision (DSM-5-TR) added a new category within the depressive disorders and bipolar disorders chapters—it's called unspecified mood disorder. With an unspecified mood disorder, a ...

Where mood disorders can cause temporary or fluctuating changes in mood, personality disorders cause symptoms that remain consistent over time and across a range of situations. For example, bipolar ...

Tic disorders are conditions featuring sudden, non-rhythmic movements or vocalizations. A formal tic disorder diagnosis is determined by tic frequency, duration, and type. Tics are non-rhythmic ...

(Kateryna Kon/Science Photo Library/Getty Images) Researchers are beginning to realize that even vastly different psychiatric ...

The theory of types of borderline personality disorder (BPD) is controversial. There is some debate over whether there are various types and what those types may be. BPD is a mental health condition ...

Hyperarousal plays an important role in mental disorders. It influences the severity of insomnia, depression, anxiety, post-traumatic stress disorder (PTSD), and ADHD. Yet it is striking that ...

Sleep-eating disorders, like nocturnal eating syndrome (NES) and sleep-related eating disorder (SRED), may cause people to eat more than they desire at night. However, treatments are available. There ...

Noticing changes in your sleep patterns? It could be a sleep disorder. Learn about sleep disorder symptoms and treatments.

A massive new study reveals that different types of intelligence share distinct genetic links with various psychiatric ...