Sandyk R
NeuroCommunication Research Laboratories, Danbury, CT 06811, USA.
Int J Neurosci. 1995 Mar;81(1-2):47-65. doi: 10.3109/00207459509015298.
Drawing tasks, both free and copied, have achieved a central position in neuropsychological testing of patients with unilateral cerebral dysfunction by virtue of their sensitivity to different kinds of organic brain disorders and their ability to provide information on lateralized brain damage. In the drawings of patients with right hemispheric damage, visuospatial neglect is revealed by the omission of details on the side of the drawing contralateral to the hemispheric lesion. Patients with unilateral cerebral damage, particularly those with left hemispheric damage, also demonstrate a tendency to place their drawings on the side of the page ipsilateral to the cerebral lesion, a phenomenon which has been termed visuospatial hemi-inattention. It has been reported previously that brief external application of alternating pulsed electromagnetic fields (EMFs) in the picotesla (pT) range intensity improved visuoperceptive and visuospatial functions and reversed neglect in Parkinsonian patients. The present communication concerns four fully medicated elderly nondemented Parkinsonian patients (mean age: 74.7 +/- 4.6 yrs; mean duration of illness: 7.7 +/- 5.2 yrs) in whom application of these EMFs produced reversal of visuospatial hemi-inattention related to left hemispheric dysfunction. These findings support prior observations demonstrating that pT EMFs may bring about reversal of certain cognitive deficits in Parkinsonian patients.
无论是自由绘画还是临摹绘画任务，因其对不同类型器质性脑疾病的敏感性以及提供关于脑损伤偏侧化信息的能力，在单侧脑功能障碍患者的神经心理学测试中占据了核心地位。在右半球损伤患者的绘画中，对侧视野空间忽视表现为绘画中与半球病变对侧的细节缺失。单侧脑损伤患者，尤其是左半球损伤患者，还表现出将绘画置于与脑损伤同侧页面的倾向，这一现象被称为视野空间半侧疏忽。此前有报道称，在皮特斯拉（pT）强度范围内短暂外部施加交变脉冲电磁场（EMF）可改善帕金森病患者的视觉感知和视野空间功能，并扭转忽视症状。本报告涉及四名完全接受药物治疗的老年非痴呆帕金森病患者（平均年龄：74.7±4.6岁；平均病程：7.7±5.2年），对这些患者施加这些电磁场后，与左半球功能障碍相关的视野空间半侧疏忽得到了扭转。这些发现支持了先前的观察结果，即皮特斯拉电磁场可能使帕金森病患者的某些认知缺陷得到扭转。
