Kostenko V. Lactation Dominates in Cows Depending on Type of Higher Nervous Activity

The dissertation is devoted to studying of intensity of lactate dominant manifestation at cows with different types of the higher nervous activity (HNA) and its peculiarities during a milking reflex. There was established for the first time in the work, that intensity of lactate dominant manifestation according to results of complex research of brain and heart biocurrents and the some endocrinological and biochemical parameters of protein and fat metabolism of first-mated cows depends on typological features of their nervous system. There was revealed, that development of proof dominant in cows with strong nervous processes provides the most intensive manifestation of milking reflex and is characterized by predominance of brain slow biocurrents, stability of heart rhythm regulation, state of autonomous balance and increasing of thyroid hormones concentration in blood. It reduces to strengthening of intensity albuminous-lipidic metabolism and to increase of milk proteins' synthesis at the cows, and fatof milk also. There was registered increasing of whole protein, ?-lipoproteins and cholesterol contents in blood under milking influence at cows of all types of the higher nervous activity. Animals of the weak type of nervous system were differed with the lowest level of the investigated parameters. It is confirmation of considerable influence of nervous processes strength on metabolism intensity and manifestation of cows' lactation dominant.There was established, that it is possible fast and with insignificant charges of work and without application of expensive reactants and animals' traumatizing to establish typological peculiarities of the higher nervous activity according to EEG parameters. If the part of alpha-rhythm in EEG is 30-39 % - the animal is classified as strong type of HNA, and less than this size - to weak type of HNA. If the part of theta-rhythm in EEG amounts 22-26 % - the animal has steady nervous processes and if it is lower than this border - unsteady.