Knyazeva M G, Kurganskaya M E, Kurgansky A V, Njiokiktjien C J, Vildavsky V J
Research Institute of Child and Juvenile Physiology, Moscow, Russia.
Behav Brain Res. 1994 Mar 31;61(1):47-58. doi: 10.1016/0166-4328(94)90007-8.
To investigate interhemispheric interaction (IHI), the EEGs of 42 children between the ages of 7-8 years were recorded while they were performing, as fast as possible, both unimanual and bimanual rhythmic tapping tasks. As an EEG index of IHI we used coherence values (Coh) in the alpha band in the pairs of leads F3/F4, C3/C4, P3/P4, O1/O2, and T3/T4 during resting and tapping. The difference between left hand (L-L) and right hand (R-R) intertap intervals in comparable conditions was though to reflect IHI. Interhemispheric alpha Coh increase was only evident in bimanual rhythmic tasks, and was confined to the C3/C4 and P3/P4 regions. Coh in these brain areas correlated negatively with the time difference between the L-L and R-R intertap intervals. The results show that interhemispheric alpha Coh. can be regarded as an index of IHI during bimanual tapping, and support the clinical hypothesis that bimanual versus unimanual tapping might reflect interhemispheric or callosal function.
为了研究半球间相互作用（IHI），我们记录了42名7至8岁儿童在尽可能快速地进行单手动和双手动节律性敲击任务时的脑电图。作为IHI的脑电图指标，我们使用了静息和敲击期间F3/F4、C3/C4、P3/P4、O1/O2和T3/T4导联对中α波段的相干值（Coh）。在可比条件下，左手（L-L）和右手（R-R）敲击间隔之间的差异被认为反映了IHI。半球间α相干性增加仅在双手动节律任务中明显，且局限于C3/C4和P3/P4区域。这些脑区的Coh与L-L和R-R敲击间隔之间的时间差呈负相关。结果表明，半球间α Coh可被视为双手动敲击期间IHI的指标，并支持临床假设，即双手动与单手动敲击可能反映半球间或胼胝体功能。
