De Toffol B, Autret A, Gaymard B, Degiovanni E
Clinique Neurologique, C.H.U. Bretonneau, Tours, France.
Electroencephalogr Clin Neurophysiol. 1992 Jun;82(6):432-7. doi: 10.1016/0013-4694(92)90048-m.
The effects of maintaining lateral gaze (as opposed to looking straight ahead) on electroencephalographic spectral power were tested in 12 right handed male subjects during eye opening (EO) and eye closure (EC). Our working hypothesis, based on Kinsbourne's paradigm, was that maintaining right lateral gaze activates the left hemisphere while maintaining left lateral gaze activates the right hemisphere, this activation resulting in a reduction in the spectral power over the hemisphere in question. Results showed that the variations in spectral power involved mainly the alpha frequency band. In the EC condition, the results were consistent with our working hypothesis: right lateral gaze produced a marked reduction in left hemispheric spectral power. In the EO condition, alpha power was constantly higher in the right hemisphere whether lateral gaze was maintained to the right or to the left. This can possibly be due to an attentional effect. Results are discussed with regard of the type of alpha rhythm and of the activation of cortical oculomotor centres. They shed light on the controversy concerning the existence of specific EEG correlates of cognitive activity, which preferentially involve each of the cerebral hemispheres.
在12名右利手男性受试者睁眼（EO）和闭眼（EC）期间，测试了保持侧方注视（与直视前方相对）对脑电图频谱功率的影响。基于金斯伯恩范式，我们的工作假设是，保持右侧方注视会激活左半球，而保持左侧方注视会激活右半球，这种激活会导致相关半球的频谱功率降低。结果表明，频谱功率的变化主要涉及α频段。在闭眼状态下，结果与我们的工作假设一致：右侧方注视使左半球频谱功率显著降低。在睁眼状态下，无论向右侧还是左侧保持侧方注视，右半球的α功率始终较高。这可能是由于注意力效应。结合α节律类型和皮质眼球运动中枢的激活对结果进行了讨论。它们揭示了关于认知活动特定脑电图相关性存在的争议，认知活动优先涉及每个大脑半球。
