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Biomedical subjects

L R Zenkov

Publications and source records attributed to L R Zenkov.

40 records · Page 3Linked to original sources
PubMedDate not supplied

[Differential diagnosis of brain tumors and chronic subdural hematomas according to echoencephalographic and electroencephalographic findings].

Examination of 15 patients with tumors of the brain in whom the presence of subdural hematomas could not be excluded and of 27 patients with chronic subdural hematomas revealed that displacement of the M-echo was 8 +/- 0.43 mm on the average in chronic subdural hematomas and 5.6 +/- 0.43 mm in tumors. EEG abnormalities were observed in 100% of cases with tumors and were mostly of a coarse character. In chronic subdural hematomas EEG abnormalities were relatively rare (18.5%) and were less manifested than those in tumors. The statistical significance of the differences evidently allows the sign of the dissociation of the EEG and Echo-EG data in chronic subdural hematomas to be used for the differentiation of the disease from tumors.

Brain Neoplasms↗
PubMedDate not supplied

[Effect of motor activity of adolescents on visual evoked cortical potentials].

Light flashes, indifferent to the subject, of 5 msec duration and of 0.27 joule intensity, were presented during school period to two groups of children with different levels of motor activity. The school children whose mobility was by 40 to 45% below the physiological norm exhibited longer latencies of late P3 and O3 components of averaged visual evoked potentials. It is assumed that the longer latencies are due to a lowered level of functional activity of the non-specific brain structures working in conditions of hypokinesia in a more synchronized regime. The introduction of a daily lesson of physical exercises of enhanced motor activity suffices to compensate for disturbances in the brain integrative activity, caused by hypokinesia.

Brain↗