We used electrocortical spectral analysis and fractal methods for assessing the effects of unilateral, single brain injury on cerebellum. Cerebellar electrocortical activity was recorded in control state (before the injury) and after a single brain injury of the cerebellar cortex in anesthetized rats. We noticed that the mean power in gamma high-frequency domain (32-128 Hz) of the cerebellum, was increased after the first brain injury, while after a two-week recovery, it was larger than before the injury. The unilateral brain injury induced a permanent increase of the mild gamma activity in both the left and the right side of cerebellum cortex, but there was no further increase after the lesion was repeated. Our recent electrophysiological study on the cerebellum (Culic et al., 2005) suggested that the mean power spectra of the cerebellar cortical activity in the gamma frequency range might be the indicator of acute single focal brain injury. However, there is insufficient information on the effects of the repeated brain injury on the cerebellar electrocortical activity and morphology. There was no significant difference between the absolute and the relative mean power of the left and the right paravermal cortical activity (before, as well as, after the injury), in each of the animals tested afterwards, but there were differences between the left and the right side of cerebellum in experimental animals. Repeated injury of the cerebellar cortical areas, is strengthened by morphological changes in the cerebellar hemisphere, and shows a decrease in delta and an increase in gamma range.

中文翻译：

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皮层电波频谱分析和分形方法评估单侧脑损伤对大鼠小脑的影响。

我们使用了皮层电波频谱分析和分形方法来评估单侧，单脑损伤对小脑的影响。在麻醉状态下，在对照组（受伤前）和小脑皮质单脑损伤后记录小脑电皮层活动。我们注意到，小脑的伽马高频域（32-128 Hz）中的平均功率在第一次脑部受伤后有所增加，而在恢复两周后，它比受伤前更大。单侧脑损伤导致小脑皮质左侧和右侧的轻度γ活性永久性增加，但在病变重复后没有进一步增加。我们最近对小脑的电生理研究（Culic等，（2005年）表明，小脑皮质活动在γ频率范围内的平均功率谱可能是急性单灶性脑损伤的指标。然而，关于反复的脑损伤对小脑电皮层活动和形态的影响的信息不足。在随后测试的每只动物中，左和右顶静脉的皮层活动的绝对和相对平均功率（在受伤之前和之后）之间没有显着差异，但是在左侧和右侧之间存在差异。实验动物的小脑右侧。小脑皮层区域的反复损伤通过小脑半球的形态变化得到加强，并显示δ减小和γ范围增大。