Deeny Sean P, Haufler Amy J, Saffer Mark, Hatfield Bradley D
Department of Kinesiology, University of Maryland, College Park, MD 20742-2611, USA.
J Mot Behav. 2009 Mar;41(2):106-16. doi: 10.3200/JMBR.41.2.106-116.
The authors assessed electroencephalographic coherence to determine the relation between cortico-cortical communication and visuomotor skill in 15 expert and 21 novice rifle shooters. They then calculated coherence and phase angles among the prefrontal (F3, F4) and ipsilateral cortical regions (central, temporal, parietal, occipital) during the aiming period for the theta (4-7 Hz), low-alpha (8-10 Hz), high-alpha (11-13 Hz), low-beta (14-22 Hz), high-beta (23-35 Hz), and gamma (36-44 Hz) bands. The authors subjected them separately to a series of analyses of variance (Group X Hemisphere X Region X Epoch). Experts generally exhibited lower coherence compared with novices, with the effect most prominent in the right hemisphere. The groups also exhibited differences in phase angle in a number of frequency bands. Coherence was positively related to aiming movement variability in experts. The results support refinement of cortical networks in experts and differences in strategic planning related to memory processes and executive influence over visual-spatial cues.
作者评估了脑电图相干性，以确定15名专业步枪射手和21名新手步枪射手的皮质-皮质通信与视觉运动技能之间的关系。然后，他们计算了在瞄准期间，前额叶（F3、F4）与同侧皮质区域（中央、颞叶、顶叶、枕叶）之间，针对θ（4-7赫兹）、低α（8-10赫兹）、高α（11-13赫兹）、低β（14-22赫兹）、高β（23-35赫兹）和γ（36-44赫兹）频段的相干性和相位角。作者分别对其进行了一系列方差分析（组×半球×区域×时期）。与新手相比，专业射手通常表现出较低的相干性，这种效应在右半球最为明显。两组在多个频段的相位角上也表现出差异。在专业射手中，相干性与瞄准运动变异性呈正相关。结果支持了专业射手中皮质网络的优化，以及与记忆过程和对视觉空间线索的执行影响相关的战略规划差异。
