R. A. CHIZHENKOVA · 1967
Researchers exposed rabbits for one minute to a constant magnetic field of 460 versts, a UHF field of wavelength 7.5 z at 30 v/m, and an SHF field of wavelength 12.5 cm with power flux density 40 m W/cm?. The constant magnetic field increased the number of EEG spindles. UHF and SHF fields caused the appearance of slow high-amplitude waves, which could be accompanied by increased spindles. Unilateral ablation of the midbrain reticular formation, posterior atrolateral thalamic nucleus, or anterior hypothalamus did not hinder these EEG responses. The authors concluded that the fields act directly on the central nervous system, not reflexively.
Arthur S. Wilson, Sanford J. Larson, Anthony Sances, Jr. · 1967
Researchers trained squirrel monkeys to press a button to avoid painful stimuli preceded by flashing lights. After training, the animals received 15 minutes of electroanesthesia followed by recovery periods ranging from 5 to 40 minutes. Performance on the decision-making task was compared before and after electroanesthesia, showing that about a 30-minute recovery period was required to return to baseline performance.
Edward J. Zuperku et al. · 1967
Milton M. Zaret · 1967
Unknown authors · 1967
Surface anodal polarization depolarizes deep pyramidal neurons while hyperpolarizing superficial elements. Surface cathodal polarization produces the opposite effects. Anodal polarization of the ventricular surface hyperpolarizes hippocampal pyramidal neurons, whereas cathodal polarization depolarizes them.
J. A. Tanner, C. Romero-Sierra, S. J. Davie · 1967
P. C. Constant, Jr. · 1967
Russell L. Carpenter, Clair A. Van Ummersen · 1967
Ivanov-Muromskiy, K. A., Likhachev, A. I. · 1967
D. P. Photiades, S. C. Ayivorh · 1967
Researchers exposed five male red patas monkeys and five human volunteers to pulsed electrostatic fields of 750 V/cm for one hour per session over ten sessions. The fields were generated by a 16,000 volt source with a 100 c/s ripple, pulsed five times per second between 25 cm square aluminum plates. When electroanesthesia was then administered, subjects pre-exposed to the fields required only 6 to 8 mA of pulsed current versus the full current in controls, and their pulse and blood pressure were 15 to 20% lower with reduced muscle spasm, while other complications were unchanged.
I. A. Kolomoitseva, G. D. Kusnetsova, M. S. Myslobodsky · 1967
Researchers conducted acute and chronic experiments on alert rabbits to study the restoration cycle of responses evoked by two to seven stimuli and single unit responses to single and low-frequency rhythmic photic stimuli. The organization of the rhythmic response depended on interaction between the evoked potential and the slow negative wave of the previous response. The augmentation phase resulted from coincidence of the stimulus with the summit of the previous slow negative wave and a facilitated evoked potential. During rhythmic spindle discharges most visual cortex elements were inhibited while a smaller part was activated. The authors assumed that the direction of unit activity changes depends on the initial polarization level of cortical cell membranes.
Ban K · 1967
S. F. Cleary, B. S. Pasternack · 1966
Posterior polar defects and opacification were the lens change categories most associated with microwave exposure. Multiple regression confirmed that age, exposure score, duration of microwave work, and their interaction significantly predicted eye scores.
Susan Korbel · 1966
In a 20-day experiment, rats receiving 60 minutes of daily radiation were significantly less active than controls during the final four days. At a higher audiogenic seizure test intensity of 140 db, exposed rats had lower seizure thresholds and longer seizure durations. Older rats needed 7 to 12 extra days for effects to appear, lower frequencies had greater impact on activity, and effects persisted for four to six days after exposure stopped.
Bryan, Robert N. · 1966
A. S. PETROV · 1966
Cleary SF, Pasternack BS · 1966
J. Richard Toleikis et al. · 1966
Three studies were conducted on squirrel monkeys with trephined skulls and Delron chambers mounted over the sensory motor cortex. Unit activity was recorded using 3 molar KCl glass micropettes with a tip diameter of approximately 10 μm. The exposure used 70 Hz rectangular current pulses of 3 ms duration with a DC bias of 2.5 mA. A triaxial electrode configuration and differential microelectrode preamplifier minimized the rectangular artifact pulses in the recordings. The current was capable of inducing marked changes in the unit potential firing rate.
J. A. Tanner · 1966
Yu. A. Trifonov, I. A. Utina · 1966
L. N. TUMARKINA, N. A. DUBROVSKII · 1966
Hornowski J, Marks E, Chmurko E, Panneri L, Wojskow · 1966
Yatsenko MI · 1966
E. A. Drogichina et al. · 1966
Heinrich Dinkloh · 1966
