FEATURES OF THE ELECTROENCEPHALOGRAPHIC PATTERN IN PATIENTS WITH HEMORRHAGIC HEMISPHERIC STROKE IN THE RECOVERY PERIOD OF THE DISEASE
DOI:
https://doi.org/10.11603/1811-2471.2021.v.i4.12809Keywords:
haemorrhagic stroke, rehabilitation, recovery period, electroencephalographyAbstract
SUMMARY. The aim: to estimate bioelectrical activity of the brain among patients with hemorrhagic hemisphere stroke in the early rehabilitation period compared to clinico-neurological data.
Material and Methods. It was conducted prospective, cohort dynamic study of 33 patients (19 male (57.58 %) and 14 female (42.42 %), mean age – 57.92±9.77) with hemorrhagic hemisphere stroke in the rehabilitation period. All patients were examined with NIHSS, mRS, BI and also EEG was performed to identify the brainʼs bioelectrical activity. It was done spectral analysis with identifying absolute power spectral destiny (APSD), relative power spectral destiny (RPSD), fronto-occipital gradients (FOG) of δ-, θ-, α- та β-rhythms and its sub-ranges, and also integral coefficients DTABR, DAR, TAR. On the 180 day the functional recovery and independence in daily life activities level was assessed.
Results: APSD value of slow wave activity in the damaged hemisphere (DH) was higher in the frontal area compared to caudal division. It also was registered the negative values of FOG of α-rhythm in DH and in the intact hemisphere (IH). However, zonal differences of αlo-rhythm were less significant in DH compared to IH. Correlation analysis revealed that there was a positive reliable correlation between level of neurological deficit on the 30th day (NIHSS score) and APSD of θ-rhythm in DH (R=+0.43, р<0.05) and so in IH (R=+0.46, р<0.05), as well as between APSD and θhi-rhythm in both hemispheres (р<0.05). Withal itʼs only in DH where ARSD of θlo-diapason had positive correlation to level of neurological deficit on the 30th day (R=+0.42, р<0.05).
Conclusions: Bioelectrical activity of the brain in hemisphere hemorrhagic stroke patients on the 30th day is characterized by higher values of APSD of θ-rhythm in DH and lower levels of APSD of α-, β-rhythms in IH, and also by smoothing zonal differences of αlo rhythms on the lesion side. Patients with complete recovery of independence in daily living activities had lower rates of APSD of βhi-rhythm in DH and higher coefficient of FOG of θlo-rhythm in the DH on the 30th day after stroke.
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