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 ...

Lymphoproliferative disorders are a group of diseases that cause an uncontrolled production of lymphocytes, a type of white blood cell. Examples include non-Hodgkin’s lymphoma and certain leukemias.

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 ...

People with Bipolar I disorder have full-blown manic attacks and deep, paralyzing depressions. A World Health Organization survey found the prevalence rate of bipolar I disorder to be 0.6 percent.

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 ...

Multiple sclerosis (MS) is a chronic, often disabling condition that affects the central nervous system, disrupting communication between the brain and body. It’s largely thought to occur when the ...

Systemic lupus erythematosus (SLE) can have links with sleep disorders such as insomnia and obstructive sleep apnea. Lupus can also make you wake up more in the night. If lupus is affecting the ...

Functioning brain cells need a functioning system for picking up the trash and sorting the recycling. But when lysosomes, the cellular sanitation machines responsible for those tasks, break down or ...

Experts say the research could reveal more about the role of genetics in autism and lead to more personalized care. A new study has identified four biologically distinct subtypes of autism, each with ...