[Visual cortical evoked potentials in emotionally unstable persons threatened with electrocutaneous stimulation].
In preliminarily selected (by a number of parameters) highly emotional subjects, evoked potentials were recorded from parietal, central, frontal and temporal cortical areas, in the first part of the experiment -- in response to indifferent light flashes (which served as a signal to achieve a precise movement), and in the second part -- in response to the same flashes, but with preliminary information of the subject on a possible electrocutaneous stimulation (in case of an error in task performing). It is found that with the threat of the electro-cutaneous stimulation the major changes are observed in the frontal, temporal and central areas. An increase in the latencies of the IV, V, VI components and P300 wave was recorded. At the same time the amplitude of the V component and that of the P300 wave decreased. The IV component was enhanced. In extreme situation the activity directed to avoid the electrostimulation was disturbed (errors of movement performance increased by 3.7 kg). The cortical mechanisms of the organization of the emotional behaviour in extreme situations are discussed.
D000293:Adolescent; D000328:Adult; D001007:Anxiety / Q000503:physiopathology*; D002540:Cerebral Cortex / Q000503:physiopathology*; D004597:Electroshock; D005071:Evoked Potentials; D005625:Frontal Lobe / Q000502:physiology; D006801:Humans; D010296:Parietal Lobe / Q000502:physiology; D013315:Stress, Psychological / Q000503:physiopathology*; D013702:Temporal Lobe / Q000502:physiology; D014796:Visual Perception / Q000502:physiology*
Zritel'nye korkovye vyzvannye potentsialy u liudeĭ s émotsional 'noĭ neustoĭchivost'iu v situatsii ugrozy élektrokozhnogo razdrazheniia.