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Catatonia is a complex neuropsychiatric behavioral syndrome that is characterized by abnormal movements, immobility, abnormal behaviors, and withdrawal. [2] [3] The onset of catatonia can be acute or subtle and symptoms can wax, wane, or change during episodes.
Similar to its predecessor, the DSM-III-R, the DSM-IV-TR aimed to bridge the gap between the DSM-IV and the subsequent major release, initially referred to as DSM-V (later titled DSM-5). [3] The DSM-IV-TR features expanded disorder descriptions, clarified wordings, and corrected errors.
[9] [3] While the DSM-I and its precursor the Statistical Manual included ambiguity in terms of whether homosexuality was a mental disorder, the DSM-II removed that ambiguity and clearly presented homosexuality and the other "sexual deviations" as mental disorders. [2]
Anhedonia is a diverse array of deficits in hedonic function, including reduced motivation or ability to experience pleasure. [1] While earlier definitions emphasized the inability to experience pleasure, anhedonia is currently used by researchers to refer to reduced motivation, reduced anticipatory pleasure (wanting), reduced consummatory pleasure (liking), and deficits in reinforcement learning.
Rett syndrome (RTT) is a genetic disorder that typically becomes apparent after 6–18 months of age and almost exclusively in females. [4] Symptoms include impairments in language and coordination, and repetitive movements. [4]
Excessive Internet use is not recognized as a disorder by the World Health Organization, the Diagnostic and Statistical Manual of Mental Disorders (DSM-5) or the International Classification of Diseases (ICD-11). However, gaming disorder appears in the ICD-11. Controversy around the diagnosis includes whether the disorder is a separate clinical ...
Paranoid personality disorder (PPD) is a mental disorder characterized by paranoia, and a pervasive, long-standing suspiciousness and generalized mistrust of others. People with this personality disorder may be hypersensitive, easily insulted, and habitually relate to the world by vigilant scanning of the environment for clues or suggestions that may validate their fears or biases.
The causes vary considerably but include a decrease in the production of normal estrogen in women, or testosterone in both men and women. Other causes may be aging, fatigue, pregnancy, medications (such as SSRIs), or psychiatric conditions, such as depression and anxiety. While many causes of low sexual desire are cited, only a few of these ...