Improvement of left visuo-spatial hemineglect by left-sided transcutaneous electrical stimulation
Improvement of left visuo-spatial hemineglect by left-sided transcutaneous electrical stimulation
复制标题
左侧经皮电刺激改善左侧视觉空间偏侧忽视
DOI：
10.1016/0028-3932(94)00088-7
复制
发表时间：
1995
期刊：
影响因子：
2.6
通讯作者：
A. Cesarani
中科院分区：
文献类型：
--
作者：
Giuseppe Vallar;M. Rusconi;S. Barozzi;B. Bernardini;D. Ovadia;Costanza Papagno;A. Cesarani
通过视觉运动探索任务（字母消除）评估经皮电刺激对左半球视觉空间忽略的影响，在右半球病变患者中进行了研究。在实验 1 中，左颈部刺激暂时改善了 14 名患者中的 13 名 (93%) 的缺陷，而右颈部刺激没有任何积极作用，导致 9 名患者 (64%) 的探索能力恶化。实验2表明，当下巴托阻止头部运动时，左颈部刺激也暂时改善了忽视。在实验 3 中，刺激左手和左颈部对视觉空间偏侧忽视具有相当的积极作用。这些结果可以解释为：（1）刺激侧对侧右半球的非特异性激活； (2)左侧体感刺激对个人外空间的自我中心坐标的特定方向影响，在被忽视的情况下，患者会向大脑病变一侧扭曲。
The effects of transcutaneous electrical stimulation on left visuo-spatial hemineglect, assessed by a visuo-motor exploratory task (letter cancellation), were investigated in patients with right hemisphere lesions. In Experiment 1 left neck stimulation temporarily improved the deficit in 13 out of 14 patients (93%), while stimulation of the right neck had no positive effects, worsening exploratory performance in nine patients (64%). Experiment 2 showed that left neck stimulation temporarily improved neglect also when head movements were prevented by a chin-rest. In Experiment 3, stimulation of both the left hand and left neck had comparable positive effects on visuo-spatial hemineglect. These results are interpreted in terms of: (1) non-specific activation of the right hemisphere, contralateral to the stimulation side; (2) specific directional effects of left somatosensory stimulation on the egocentric co-ordinates of extra-personal space, which in neglect patients are distorted towards the side of the brain lesion.