Alexander V. Bogdanov

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A hidden excitation focus (dominanta focus) was produced in the rabbit's CNS by threshold electrical stimulation of the left forelimb with the frequency of 0.5 Hz. As a rule, after the formation of the focus, pairs of neurons with prevailing two-second rhythm in their correlated activity were revealed both in the left and right sensorimotor cortices (with(More)
A stationary excitation focus produced in rabbit cortex by rhythmical electrodermal paw stimulation was revealed by presentation of testing sound stimuli, which were earlier indifferent for an animal. The multiunit activity in the sensorimotor cortex was recorded. The neuronal pairs were detected with correlated discharges. Analysis of discharges in such(More)
A hidden excitation focus of the rhythmic nature (a rhythmic defensive dominant focus) was produced in the rabbit's CNS. The focus was formed by means of threshold electrodermal stimulation of the left forelimb by series of pulses consisting of 15-20 stimuli with 2 s intervals between the pulses. Correlated activity of cells in the sensorimotor cortex of(More)
The latent excitation focus in the sensorimotor cortex of rabbits was formed by a series of pulses of the threshold current applied on a paw with 2-second intervals. After repeated applications of the routine immobilization procedure, besides the 2-second starts of the paw in response to testing stimulus, spontaneous starts appeared with the intervals close(More)
A defensive dominant was created in rabbits using rhythmic electrocutaneous stimulation of the left forelimb at a frequency of 0.5 Hz. After stimulation ended, the latent excitation state was tested using sound stimuli. Animals responded either with increases in non-rhythmic paw muscle activity or with rhythmic twitching of the paw at a frequency close to(More)
Light microscopy methods were used to study the main stages in the organogenesis of the pituitary in human embryos at Carnegie stages (CS) 12-23. Rathke's pouch (RP) was shown to form as a traction fold over whole width of the roof of the stomodeum in embryos at CS 12 due to a flexure of the neural tube with which the epithelium had a tight anatomical(More)