Tan U, Kutlu N
Atatürk University, Medical Faculty, Department of Physiology, Erzurum, Turkey.
Int J Neurosci. 1992 May-Jun;64(1-4):125-38. doi: 10.3109/00207459209000539.
The associations between right and left hand skills to cerebral motor lateralization were studied in right-handed subjects with (FS+) and without (FS-) familial sinistrality. Hand preference was assessed by Oldfield questionnaire and hand skill by the peg moving task. The mean peg moving times (PMTs) and their standard deviations (SDs) were calculated for each hand. There was a significant positive linear correlation between the mean right and left hand PMTs. In males, the mean difference between the left and right PMTs (L-R) showed a significant negative linear correlation with the mean right hand PMTs. There was no significant correlation between these parameters in females. The mean L-R PMTs were found to be positively linearly correlated with the mean left hand PMT in FS- males, FS- and FS+ females (no correlation in FS+ males). The results indicated the contribution of the mean left hand PMTs to L-R hand skill is much higher than that of the mean right hand PMTs. In males, there was no significant correlation between SDs of the mean right and left hand PMTs. In females, SD of the mean right hand PMT was found to be positively linearly related to SD of the left hand PMT. In males, L-R SDs were found to be negatively linearly related to SDs of the mean right hand PMTs and positively linearly related to the SDs of the mean left hand PMTs. In females, only the mean left hand PMT positively linearly correlated with L-R SDs. Here again, the left hand prominently influenced the L-R SDs. In males, SD for the mean right hand PMT showed no relation to right hand PMT. There was, however, a negative linear correlation between SD of the mean right hand PMT and the left hand PMT (no correlations in female). It was concluded that the left hand (right brain) would be of higher significance than the right hand (left brain) in determining the degree of the right-bias in hand skill and its stability in right-handers.
在有家族性左利手（FS+）和无家族性左利手（FS-）的右利手受试者中，研究了左右利手技能与大脑运动偏侧化之间的关联。通过奥尔德菲尔德问卷评估手偏好，通过插栓移动任务评估手技能。计算每只手的平均插栓移动时间（PMT）及其标准差（SD）。左右手平均PMT之间存在显著的正线性相关。在男性中，左手和右手PMT的平均差异（L-R）与右手平均PMT呈显著的负线性相关。在女性中，这些参数之间无显著相关性。在FS-男性、FS-和FS+女性中，平均L-R PMT与左手平均PMT呈正线性相关（FS+男性中无相关性）。结果表明，左手平均PMT对L-R手技能的贡献远高于右手平均PMT。在男性中，左右手平均PMT的标准差之间无显著相关性。在女性中，右手平均PMT的标准差与左手平均PMT的标准差呈正线性相关。在男性中，L-R标准差与右手平均PMT的标准差呈负线性相关，与左手平均PMT的标准差呈正线性相关。在女性中，只有左手平均PMT与L-R标准差呈正线性相关。同样，左手对L-R标准差有显著影响。在男性中，右手平均PMT的标准差与右手PMT无关。然而，右手平均PMT的标准差与左手PMT呈负线性相关（女性中无相关性）。得出的结论是，在确定右利手的手技能右偏程度及其稳定性方面，左手（右脑）比右手（左脑）具有更高的重要性。
