Mental and behavioural disorders

Catalepsy (from Greek κατάληψις "seizing/grasping") is a nervous condition characterized by muscular rigidity and fixity of posture regardless of external stimuli, as well as decreased sensitivity to pain.

Neuroleptic malignant syndrome (NMS) is a life-threatening neurological disorder most often caused by an adverse reaction to neuroleptic or antipsychotic drugs.

Schizophreniform disorder is a mental disorder diagnosed when symptoms of schizophrenia are present for a significant portion of the time within a one-month period, but signs of disruption are not present for the full six months required for the diagnosis of schizophrenia.

Hallucinogen persisting perception disorder (HPPD) is a disorder characterized by a continual presence of sensory disturbances, most commonly visual, that are reminiscent of those generated by the use of hallucinogenic substances.

Asperger syndrome (AS), also known as Asperger's, is a developmental disorder characterized by significant difficulties in social interaction and nonverbal communication, along with restricted and repetitive patterns of behavior and interests.

A stereotypy (/ˈstɛriəˌtaɪpi, ˈstɪər-, -ioʊ-/, STAIR-ee-oh-TEYE-pee or STEER-ee-oh-TEYE-pee) is a repetitive or ritualistic movement, posture, or utterance.

("Emotional disabilities" redirects here. For other uses, see Emotional disability.) A mental disorder, also called a mental illness or psychiatric disorder, is a diagnosis by a mental health professional of a behavioral or mental pattern that may cause suffering or a poor ability to function in life.

Delirium tremens (DTs) is a rapid onset of confusion usually caused by withdrawal from alcohol.

Schizoaffective disorder (SZA, SZD or SAD) is a mental disorder characterized by abnormal thought processes and deregulated emotions.

Acedia (/əˈsiːdiə/; also accidie or accedie /ˈæksᵻdi/, from Latin acedĭa, and this from Greek ἀκηδία, "negligence") is a state of listlessness or torpor, of not caring or not being concerned with one's position or condition in the world.

Catatonia is a state of neurogenic motor immobility and behavioral abnormality manifested by stupor.

The medical expression tardive dysphrenia, was proposed by the American neurologist Stanley Fahn, the head of the Division of Movements Disorders of the Neurological Institute of New York, in collaboration with the psychiatrist David V Forrest in the 1970s.

Intermittent explosive disorder (sometimes abbreviated as IED) is a behavioral disorder characterized by explosive outbursts of anger and violence, often to the point of rage, that are disproportionate to the situation at hand (e.g., impulsive screaming triggered by relatively inconsequential events).

The Jumping Frenchmen of Maine were a group of 19th-century lumberjacks who exhibited a rare disorder of unknown origin.

Sexual maturation disorder is a disorder of anxiety or depression related to an uncertainty about one's gender identity or sexual orientation.

The classification of mental disorders, also known as psychiatric nosology or psychiatric taxonomy, is a key aspect of psychiatry and other mental health professions and an important issue for people who may be diagnosed.

“…a condition exhibiting one or more of the following characteristics over a long period of time and to a marked degree that adversely affects a child’s educational performance The classification is often given to students that need individualized behavior supports to receive a free and appropriate public education, but would not be eligible for an individualized education program under another disability category of the Individuals with Disabilities Education Act (IDEA).

Psychomotor retardation (also known as "psychomotor impairment" or "motormental retardation") involves a slowing-down of thought and a reduction of physical movements in an individual.

Sexual relationship disorder is a disorder where a person has difficulties in forming or maintaining a sexual relationship because of their gender identity or sexual orientation.

Caffeine-induced sleep disorder is a psychiatric disorder that results from overconsumption of the stimulant caffeine.