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Teratology is the study of abnormalities of physiological development in organisms during their life span. It is a sub-discipline in medical genetics which focuses on the classification of congenital abnormalities in dysmorphology caused by teratogens and also in pharmacology and toxicology.
Teratogens are environmental agents that cause birth defects. Some agents that are theorized to cause birth defects have also been suggested as potential autism risk factors, although there is little to no scientific evidence to back such claims. These include exposure of the embryo to valproic acid, [1] paracetamol, [75] thalidomide or ...
Teratogens are substances that may cause birth defects via a toxic effect on an embryo or foetus. Subcategories. This category has the following 13 subcategories, out ...
In human developmental psychology or non-human primate experiments, ordinal numerical competence or ordinal numerical knowledge is the ability to count objects in order and to understand the greater than and less than relationships between numbers. It has been shown that children as young as two can make some ordinal numerical decisions.
Figure A: Normal Decay Figure B: Sleeper Effect. The sleeper effect is a psychological phenomenon that relates to persuasion. It is a delayed increase in the effect of a message that is accompanied by a discounting cue, typically being some negative connotation or lack of credibility in the message, while a positive message may evoke an immediate positive response which decays over time.
Because methylmercury is a teratogen, the mercury poisoning of those residing by the bay resulted in neurological defects in the offspring. Infants exposed to mercury poisoning in utero showed predispositions to cerebral palsy , ataxia , inhibited psychomotor development, and intellectual disability.
Because alcohol is a known teratogen, it is considered unethical to do randomized controlled trials on pregnant women to determine the precise toxicity effects of alcohol. [31] Among women who consume any quantity of alcohol during pregnancy, the risk of giving birth to a child with FASD is about 15%, and to a child with FAS about 1.5%.
In developmental psychology and developmental biology, a critical period is a maturational stage in the lifespan of an organism during which the nervous system is especially sensitive to certain environmental stimuli. If, for some reason, the organism does not receive the appropriate stimulus during this "critical period" to learn a given skill ...