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The definition and classification of mental disorders are key issues for researchers as well as service providers and those who may be diagnosed. For a mental state to be classified as a disorder, it generally needs to cause dysfunction. [15] Most international clinical documents use the term mental "disorder", while "illness" is also common.
Some define disorders of consciousness as any change from complete self-awareness to inhibited or absent self-awareness and arousal. This category generally includes minimally conscious state and persistent vegetative state, but sometimes also includes the less severe locked-in syndrome and more severe but rare chronic coma.
Dementia is an ancient term which has been in use since at least the time of Lucretius in 50 BC where it meant "being out of one's mind". [7] Until the seventeenth century, dementia referred to states of cognitive and behavioural deterioration leading to psychosocial incompetence.
Mental health encompasses emotional, psychological, and social well-being, influencing cognition, perception, and behavior.According to the World Health Organization (WHO), it is a "state of well-being in which the individual realizes his or her abilities, can cope with the normal stresses of life, can work productively and fruitfully, and can contribute to his or her community". [1]
This is an accepted version of this page This is the latest accepted revision, reviewed on 1 February 2025. Long-term brain disorders causing impaired memory, thinking and behavior This article is about the cognitive disorder. For other uses, see Dementia (disambiguation). "Senile" and "Demented" redirect here. For other uses, see Senile (disambiguation) and Demented (disambiguation). Medical ...
One is a stage on the way to coma, the other on the way to sleep, which is very different. [19] [20] The affected person has a sensation of mental clouding described in the patient's own words as "foggy". [4] One patient said, "I thought it became like misty, in some way... the outlines were sort of fuzzy". [18]
The term captures concerns about the impact of consuming excessive amounts of low-quality online content.
Pseudodementia (otherwise known as depression-related cognitive dysfunction or depressive cognitive disorder) is a condition that leads to cognitive and functional impairment imitating dementia that is secondary to psychiatric disorders, especially depression.