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4 days ago · July 12, 2024 by DeepakRajput. Definition: Hallucinogens, also known as psychedelics, are a class of drugs that alter perception, mood, and cognitive processes, often leading to profound changes in consciousness and sensory experiences. These substances can induce hallucinations, distortions of time and space, and altered states of consciousness.
1 day ago · Anxiety is an emotion which is characterised by an unpleasant state of inner turmoil and includes feelings of dread over anticipated events. [1] [2] [3] Anxiety is different from fear in that fear is defined as the emotional response to a present threat, whereas anxiety is the anticipation of a future one. [4]
3 days ago · A psychoactive drug, or psychoactive substance, among other names such as psychoactive agent, psychopharmaceutical, and psychotropic drug, is a chemical substance that changes the function of the nervous system and results in alterations of perception, mood, cognition, and behavior. [1]
3 days ago · Depression, in psychology, is a mood or emotional state marked by feelings of low self-worth or guilt and a reduced ability to enjoy life. Depression differs from simple grief or mourning and can be classified into different types. Learn more about the causes, symptoms, types, and treatments for depression.
- The Editors of Encyclopaedia Britannica
1 day ago · Jevning et al. (1992): "We define meditation... as a stylized mental technique... repetitively practiced for the purpose of attaining a subjective experience that is frequently described as very restful, silent, and of heightened alertness, often characterized as blissful"
1 day ago · Definition. Apoptosis is the process of programmed cell death. It is used during early development to eliminate unwanted cells; for example, those between the fingers of a developing hand. In adults, apoptosis is used to rid the body of cells that have been damaged beyond repair.
3 days ago · Abortion, the expulsion of a fetus from the uterus before it has reached the stage of viability (in human beings, usually about the 20th week of gestation).
