Hellige J B, Taylor K B, Lesmes L, Peterson S
Department of Psychology, University of Southern California, Los Angeles 90089-1061, USA.
Brain Cogn. 1998 Mar;36(2):158-92. doi: 10.1006/brcg.1997.0951.
Thirty adult males identified consonant-vowel-consonant nonword trigrams projected briefly to the left visual field (right hemisphere), the right visual field (left hemisphere) or to both visual fields (and hemispheres) simultaneously. Magnetic resonance images of the brains of these same individuals provided measurements of the length of the Sylvian fissure and surface area of the planum temporale within each hemisphere as well as measurements of the midsagittal area of the corpus callosum. Both behavioral and morphological asymmetries were consistent with those found in previous studies. In addition, there were several relationships between brain morphology and trigram naming. For example, as the length of the right-hemisphere Sylvian fissure increased to become more like the typical length of the left-hemisphere Sylvian fissure, there were fewer errors of trigram identification and attention was distributed more quickly or evenly across the three letters contained in the display. In addition, as the midsagittal area of the corpus callosum increased, the percentage of errors increased on left visual field trials, but not on right visual field or bilateral trials, suggesting that an increase in corpus callosum size may be indicative of greater functional isolation of the two hemispheres.
30名成年男性被试者观看了以辅音-元音-辅音形式构成的非词三音节词，这些词被短暂投射到左视野（右半球）、右视野（左半球）或同时投射到两个视野（及两个半球）。对这些被试者大脑进行的磁共振成像测量了每个半球内的外侧裂长度和颞平面表面积，以及胼胝体的矢状中面积。行为和形态学上的不对称与先前研究结果一致。此外，大脑形态与三音节词命名之间存在多种关系。例如，随着右半球外侧裂长度增加并变得更接近左半球外侧裂的典型长度，三音节词识别错误减少，并且注意力在显示的三个字母上分布得更快或更均匀。此外，随着胼胝体矢状中面积增加，左视野试验中的错误百分比增加，但右视野或双侧试验中没有增加，这表明胼胝体大小增加可能表明两个半球的功能隔离增强。
