This theory accounts for the maintenance of a polymorphism (i.e., two or more alleles for the same trait) by means of stabilising selection. Natural selection does not create genetic variation, but instead removes it (by directional selection) or preserves it (by stabilising selection). In the first case, the outcome is a transient polymorphism and in …
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Theoretical pluralism
Situation that encourages the simultaneous development of a diversity of explanatory theories, typically marked by phases of peaceful co-existence and rivalry that cannot be settled by legislation . See Paradigm shift, Theoretical co-evolution
Theoretical co-evolution
Theories at different levels of organisation can co-evolve such that corrective modifications are made to both them so that eventually some degree of reduction of one to other becomes possible. A central concept in Patricia S. Churchland‚was attempt to defend the merits of reductionism in science, especially between psychology and neuroscience, and expounded in her …
The Observer
A sophisticated software system that allows for the recording and analysis of observational data either live or from video recordings . See Coding schemes
The eight phases of gait cycle in upright bipedal locomotion for the stance phase (1-4) and swing phase (5-8) during which the right leg (red) starts by leading the left leg (blue). See Central pattern generator (CPG), Digitigrade locomotion, Galloping, Gross motor abilities, Hopping, Locomotion, Parkinson’s disease, Plantigrade locomotion, Skipping, Running, Walking
t phases of gait cycle in upright bipedal locomotion for the stance phase (1-4) and swing phase (5-8) during which the right leg (red) starts by leading the left leg (blue). See Central pattern generator (CPG), Digitigrade locomotion, Galloping, Gross motor abilities, Hopping, Locomotion, Parkinson‚aas disease, Plantigrade locomotion, Skipping, Running, Walking
The Kanizsa triangle in which illusory contours appear to form a triangle although there are no corresponding changes in luminance. Nevertheless, the illusory figure is seen as being brighter than the background.
zsa triangle in which illusory contours appear to form a triangle although there are no corresponding changes in luminance. Nevertheless, the illusory figure is seen as being brighter than the background.
The effects of thalidomide on particular body parts of the body. The effects are rather specific, suggesting that there are sensitive periods for the growth of each body part shown. Thalidomide taken between 34-38 days after conception can result in the absence of an outer ear, and the absence of one leg if taken between around 46 days. See Sensitive period, Teratogen
cts of thalidomide on particular body parts of the body. The effects are rather specific, suggesting that there are sensitive periods for the growth of each body part shown. Thalidomide taken between 34-38 days after conception can result in the absence of an outer ear, and the absence of one leg if taken between around …
Thalidomide
A non-barbituate sedative administered in the early pregnancy to combat ‘morning sickness’ during the 1950s and 1960s. Its effects included partial of complete loss of limbs, but no cognitive deficits, which seemed to operate in what appear to be sensitive periods in the growth of particular body parts as shown in the figure below.
Thalamus
A collection of nuclei in the forebrain that receives input from all the senses (except olfaction), as well as from various parts of the motor and motivational systems, and relays it to the cerebral cortex. The thalamus also has reciprocal connections with the cerebral cortex. See Cerebral cortex (or pallium), Cell migration, Extrapyramidal system, Lateral …
Testosterone
Often defined as a ‚aamale‚aa sex (androgen) anabolic steroid hormone, because it is manufactured in large quantity by the Leydig cells of the testes. It is also produced by the ovaries as it is required for the production of oestrogen, and in smaller quantities by the cortex of the adrenal gland. Thus, testosterone is present …