Intrahemispheric EEG: A New Perspective for Quantitative EEG Assessment in Poststroke Individuals.

IF 3 4区 医学 Q2 NEUROSCIENCES
Neural Plasticity Pub Date : 2021-09-21 eCollection Date: 2021-01-01 DOI:10.1155/2021/5664647
Rodrigo Brito, Adriana Baltar, Marina Berenguer-Rocha, Lívia Shirahige, Sérgio Rocha, André Fonseca, Daniele Piscitelli, Kátia Monte-Silva
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引用次数: 7

Abstract

The ratio between slower and faster frequencies of brain activity may change after stroke. However, few studies have used quantitative electroencephalography (qEEG) index of ratios between slower and faster frequencies such as the delta/alpha ratio (DAR) and the power ratio index (PRI; delta + theta/alpha + beta) for investigating the difference between the affected and unaffected hemisphere poststroke. Here, we proposed a new perspective for analyzing DAR and PRI within each hemisphere and investigated the motor impairment-related interhemispheric frequency oscillations. Forty-seven poststroke subjects and twelve healthy controls were included in the study. Severity of upper limb motor impairment was classified according to the Fugl-Meyer assessment in mild/moderate (n = 25) and severe (n = 22). The qEEG indexes (PRI and DAR) were computed for each hemisphere (intrahemispheric index) and for both hemispheres (cerebral index). Considering the cerebral index (DAR and PRI), our results showed a slowing in brain activity in poststroke patients when compared to healthy controls. Only the intrahemispheric PRI index was able to find significant interhemispheric differences of frequency oscillations. Despite being unable to detect interhemispheric differences, the DAR index seems to be more sensitive to detect motor impairment-related frequency oscillations. The intrahemispheric PRI index may provide insights into therapeutic approaches for interhemispheric asymmetry after stroke.

Abstract Image

脑内脑电图:脑卒中后个体定量脑电图评估的新视角。
中风后,大脑活动的快慢频率之比可能会发生变化。然而,很少有研究使用定量脑电图(qEEG)指数来衡量慢频率和快频率之间的比率,如delta/alpha比(DAR)和功率比指数(PRI);δ + θ / α + β)用于研究卒中后受影响半球和未受影响半球之间的差异。在此,我们提出了一个新的视角来分析每个半球的DAR和PRI,并研究了运动损伤相关的半球间频率振荡。47名中风后受试者和12名健康对照者参与了这项研究。根据Fugl-Meyer评分将上肢运动障碍的严重程度分为轻度/中度(n = 25)和重度(n = 22)。计算每个半球(脑内指数)和两个半球(脑指数)的qEEG指数(PRI和DAR)。考虑到大脑指数(DAR和PRI),我们的研究结果显示,与健康对照组相比,中风后患者的大脑活动减慢。只有半球内PRI指数能够发现显著的半球间频率振荡差异。尽管不能检测到半球间的差异,但DAR指数似乎对检测运动损伤相关的频率振荡更敏感。脑内PRI指数可能为脑卒中后脑间不对称的治疗方法提供见解。
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来源期刊
Neural Plasticity
Neural Plasticity NEUROSCIENCES-
CiteScore
6.80
自引率
0.00%
发文量
77
审稿时长
16 weeks
期刊介绍: Neural Plasticity is an international, interdisciplinary journal dedicated to the publication of articles related to all aspects of neural plasticity, with special emphasis on its functional significance as reflected in behavior and in psychopathology. Neural Plasticity publishes research and review articles from the entire range of relevant disciplines, including basic neuroscience, behavioral neuroscience, cognitive neuroscience, biological psychology, and biological psychiatry.
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