Pfurtscheller G, Wege W, Sager W
EEG EMG Z Elektroenzephalogr Elektromyogr Verwandte Geb. 1980 Jun;11(2):63-71.
Eleven patients with a history of ischemic lesion and weak hemiparesis were used in this study. Bipolar EEG recordings were made from the central region at rest and during voluntary infrequent first-clenching. After computer analysis, percentage alpha power, alpha power decrease during movement (ERD: event-related desynchronization) and alpha-peak frequency were calculated and compared for symmetry in homologeous derivations. As reference a collectiv of 33 normals was used. In 8 out of 11 patients a significant (p < 0.05) alpha-asymmetry was found and in 2 out of 11 a significant (p < 0.05) asymmetry in the ERD. Summarizing all results, 9 out of 11 patients showed significant asymmetry within the central alpha activity. Computer EEG was done on average 18 days after onset of infarction. In clinical EEG, recorded within one week after infarction, 3 out of 11 patients were reported with pathological findings.
本研究选取了11例有缺血性病变病史且伴有轻度偏瘫的患者。在静息状态及偶尔进行自主首次握拳时，从中央区进行双极脑电图记录。经过计算机分析，计算并比较了同源导联中α波功率百分比、运动期间α波功率下降（事件相关去同步化：ERD）以及α波峰值频率的对称性。以33名正常人作为对照。11例患者中有8例发现显著（p < 0.05）的α波不对称，11例中有2例发现显著（p < 0.05）的ERD不对称。总结所有结果，11例患者中有9例在中央α波活动中表现出显著不对称。脑电图检查平均在梗死发作后18天进行。在梗死一周内记录的临床脑电图中，11例患者中有3例报告有病理发现。
