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2000Trut L N; Pliusnina I Z; Kolesnikova L A; Kozlova O N
[Interhemisphere neurochemical differences in the brain of silver foxes selected for behavior and the problem of directed asymmetry]
Genetika 2000;36(7):942-6.
The study deals with the mechanisms that bring about a directional asymmetry in the expression of some morphological traits observed in some animals subjected to experimental domestication. The key role in the integration of development is attributed to the genetic systems controlling the activity of brain neurotransmitter systems. Therefore, the investigation of directional asymmetry of morphological traits began with the analysis of interhemispheral differences in neurotransmitter activity in animal lines selected for domestic and aggressive behavior. Experiments on silver foxes reveal interhemispheral differences in the dopaminergic system emerging in the striatum. An increased dopamine level is observed in the right half of the striatum of aggressive foxes and in both right and left halves of the striata of domestic foxes. On the basis of the literature data, it is suggested that the considerable increase in the dopamine level in the right halves of the striata of both aggressive and domestic animals is related to a genetic increase in the manifestation of emotional response in both lines, whereas its increase in the left half of the striatum of domesticated foxes may be related to a correlated deterioration of the function of the pituitary-adrenal system.

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