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In biology, a ring species is a connected series of neighbouring populations, each of which interbreeds with closely sited related populations, but for which there exist at least two "end populations" in the series, which are too distantly related to interbreed, though there is a potential gene flow between each "linked" population and the next ...
An endotype is a subtype of a health condition, which is defined by a distinct functional or pathobiological mechanism. [1] This is distinct from a phenotype, which is any observable characteristic or trait of a disease, such as development, biochemical or physiological properties without any implication of a mechanism.
Evidence suggests that it is the interaction between genes and the environment may be associated with the development of schizophrenia. [2] This is a complex process involving multiple environmental factors that have influence on a range of developmental periods that interact with a genetic susceptibility. [7]
The PSQ (Psychosis Screening Questionnaire) is the most common tool in detecting psychotic symptoms and it includes five root questions that assess the presence of PLE (mania, thought insertion, paranoia, strange experiences and perceptual disturbances) [124] The different tools used to assess symptom severity include the Revised Behavior and ...
The solute carrier family 18 member 2 (SLC18A2) also known as vesicular monoamine transporter 2 (VMAT2) is a protein that in humans is encoded by the SLC18A2 gene. [5] SLC18A2 is an integral membrane protein that transports monoamines —particularly neurotransmitters such as dopamine , norepinephrine , serotonin , and histamine —from ...
Mathematical models, laboratory studies, and observational evidence supports the existence of parapatric speciation's occurrence in nature. The qualities of parapatry imply a partial extrinsic barrier during divergence; [2] thus leading to a difficulty in determining whether this mode of speciation actually occurred, or if an alternative mode (notably, allopatric speciation) can explain the data.
For example, a person may believe that they are in fact not in the hospital to which they were admitted, but an identical-looking hospital in a different part of the country. [ 8 ] Cotard's syndrome is a rare disorder in which people hold a delusional belief that they are dead (either figuratively or literally), do not exist, are putrefying ...
Substance-induced psychosis (commonly known as toxic psychosis or drug-induced psychosis) is a form of psychosis that is attributed to substance intoxication, withdrawal or recent consumption of psychoactive drugs. It is a psychosis that results from the effects of various substances, such as medicinal and nonmedicinal substances, legal and ...