ABSTRACT
Studies were carried out on 150 workers with mental disturbances, who had been involved in the clean-up of the Chernobyl atomic energy station accident. Visual and computer analyses of EEG traces from 43 workers were compared with traces from 17 healthy subjects, and the comparison revealed that the most common features in workers were disorganization of the alpha-rhythm and strengthening of beta-1-activity in the sensorimotor cortex. In neurosis-like syndromes (13 patients), there was a significant increase in the power of the alpha-rhythm in the anterior parts of the cortex; in psycho-organic states, power as significantly reduced (especially in the left hemisphere). Contributing to the greater proportion of flat EEG traces in patients with psycho-organic syndromes as compared with other groups of patients. Most patients among the clean-up workers had increased assimilation of flashing light rhythms and weakening of non-specific and skin galvanic responses to a light stimulus. It was concluded that systemic CNS changes occurred in patients from the clean-up worker groups, especially in those with psycho-organic syndrome.
Subject(s)
Electroencephalography , Mental Disorders/physiopathology , Power Plants , Radioactive Hazard Release , Adult , Autonomic Nervous System/physiopathology , Brain Mapping , Electrophysiology , Evoked Potentials, Visual/physiology , Galvanic Skin Response/physiology , Humans , Male , Middle Aged , Photic Stimulation , Signal Processing, Computer-Assisted , UkraineABSTRACT
Temporal relations were analyzed between the VEP components in the occipital and central cortical areas in 7 and 10-year-old boys with normal intelligence, with mental retardation, and with debile oligophrenia in three experimental sessions with different instructions. It was found out that the intrahemispheric relations of the isopolar VEP components to a flash and patterned stimulus similar to those in adult persons developed in healthy children only to the age of 10 years. In children with intellectual deficiency such relations were distorted both in perception of the flash and patterned visual stimuli and during mental representation of the latter.
Subject(s)
Evoked Potentials, Visual/physiology , Form Perception/physiology , Intellectual Disability/physiopathology , Mental Processes/physiology , Motor Cortex/physiology , Visual Cortex/physiology , Child , Electroencephalography/instrumentation , Functional Laterality/physiology , Humans , Male , Photic Stimulation , Reference Values , Time FactorsABSTRACT
Under study was function of the upper extremity in 56 patients at different terms after plasty of defects of the head and neck with muscular-cutaneous flaps. The greatest restriction of movements in the humeral articulation was found after inclusion of the musculus trapezius into the flap. Formation of the free flap including the broadest muscle of the back resulted in a minimum restriction of the shoulder mobility. A year or more later contractures of the humeral articulation in the side of formation of the flap were noted in patients with paralysis of musculus trapezius and in patients who were not engaged in therapeutic physical training.
Subject(s)
Arm/physiopathology , Head and Neck Neoplasms/surgery , Surgical Flaps , Adolescent , Adult , Aged , Head and Neck Neoplasms/rehabilitation , Humans , Middle Aged , Movement , Shoulder Joint/physiopathology , Time FactorsSubject(s)
Food Deprivation/physiology , Hypoxia/physiopathology , Nitrogen/physiology , Adult , Humans , Male , Oxygen Consumption , Respiratory Function TestsABSTRACT
Visual evoked potentials (VEP) to flash and patterned visual stimuli have been recorded from occipital and central brain regions in 7-8-year-old boys with normal intellect (20 cases), with mental retardation (15 cases) and with oligophrenia of a debile degree (27 cases). A significant elongation of late-component latency has been revealed in motor brain areas VEP in oligophrenia group compared to normal subjects. A negative correlation between P190 component latency of motor area VEP to patterned visual stimulus and general and non-verbal intellectual indices has been stated in full right-handed subjects with intellectual deficiency. Such a relation was absent in right-handed patients with left dominant eye.
Subject(s)
Dominance, Cerebral , Evoked Potentials, Visual , Intellectual Disability/physiopathology , Child , Electroencephalography , Functional Laterality , Humans , Intellectual Disability/psychology , Male , Photic Stimulation/methods , Psychomotor Performance , Psychopathology , Reaction TimeABSTRACT
150 liquidators who had worked in the Chernobyl accident area were examined. All of them had mental diseases. Both alpha-rhythms disorganisation and increase of beta-1 activity were usually observed in brain cortex sensomotor areas of 43 patients as compared with 17 healthy individuals. Meanwhile alpha-activity was significantly decreased especially in the left hemispheres of patients with psycho-organic syndrome. The majority of patients were characterized by both enhanced reaction to light flashes rhythm assimilation and the decrease of nonspecific and skin-galvanic reactions to the light stimulus. The conclusion is made about the systemic CNS damage in such patients that was more pronounced in psycho-organic syndrome.