[The Effect of Cortical Spreading Depression Wave on EEG Spectral Power Anaesthesed and Conscious Rats].

IF 0.2 4区 医学 Q4 NEUROSCIENCES Zhurnal Vysshei Nervnoi Deyatelnosti Imeni I P Pavlova Pub Date : 2016-03-01
V I Koroleva, D S Sakharov, A V Bogdanov
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Abstract

EEG power changes in anaesthetized and conscious rats were studied (under repeated experiments) in wide frequency band (0.1-200 Hz) during cortical spreading depression wave (SD). In anaesthetized rats the decrease of EEG spectral power was shown through all diapasons under consideration. The most pronounced decay of the EEG power was marked in the 30-40 Hz band (27.3 ± 18.5, p = 2.46 x 10-(11)). In other frequency ranges the power decrease was less but its significance remained high. In conscious rats the simultaneous decay of the EEG power from 20 to 100 Hz range was also the most informative index of SD wave. The maximum power loss was found for band 30-40 Hz (11.2 ± 7.8, p = 2.55 x 10(-7)). It was shown that besides of EEG power decay the development of SD wave was characterized by the appearance of high frequency activity in front of SD and at the end of it. The increase of high-frequency activity in front of SD wave appeared in the ipsilateral hemisphere and moved along the cortex with the velocity of the SD wave itself. However the bursts of high frequency activity at the end of unilateral SD occurred simultaneously in both hemispheres and lasted 1.5-2.5 min. Findings contribute to detection of SD wave on basis of EEG spectral analysis.

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脑皮层扩张性压抑波对麻醉和清醒大鼠脑电图频谱功率的影响。
采用重复实验的方法,研究了麻醉大鼠和清醒大鼠皮层扩张性凹陷波(SD)宽频带(0.1 ~ 200 Hz)脑电功率的变化。麻醉大鼠的脑电图频谱功率在各电位下均呈下降趋势。30 ~ 40 Hz频段脑电功率衰减最明显(27.3±18.5,p = 2.46 × 10-(11))。在其他频率范围内,功率下降较小,但其显著性仍然很高。清醒大鼠脑电功率在20 ~ 100 Hz范围内的同时衰减也是SD波最具信息量的指标。最大功率损耗在30-40 Hz频段(11.2±7.8,p = 2.55 × 10(-7))。结果表明,除脑电功率衰减外,SD波的发展还表现为在SD前和SD后出现高频活动。SD波前高频活动的增加出现在同侧半球,并随着SD波本身的速度沿皮层移动。然而,在单侧SD结束时,两个半球的高频活动爆发同时发生,持续时间为1.5 ~ 2.5 min。这些发现有助于在EEG频谱分析的基础上检测SD波。
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来源期刊
CiteScore
0.70
自引率
33.30%
发文量
9
审稿时长
6-12 weeks
期刊介绍: Information not localized
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