Hopkins W D, Marino L, Rilling J K, MacGregor L A
Department of Psychology, Berry College, Emory University, Atlanta, GA 30322, USA.
Neuroreport. 1998 Aug 24;9(12):2913-8. doi: 10.1097/00001756-199808240-00043.
The planum temporale (PT), a portion of Wernicke's area, is important for linguistic functions in humans and is larger in the left compared to the right hemisphere. In this study, we assessed the presence and size of the PT in a sample of non-human primates including 21 great apes, four lesser apes, 11 Old World monkeys and eight New World monkeys using magnetic resonance imaging. The PT was measured in both the sagittal and coronal planes by use of multiplanar reformatting software. The PT could only be identified in the sample of great apes and not in the remaining non-human primate species. Within the great ape sample, the PT was larger in the left hemisphere than in the right in a statistical majority of the subjects. These results are consistent with the notion that the PT evolved as a definable structure about 15 million years ago and may have arisen as a result for selection for greater cortical folding which in turn led to greater gyrification in larger brains.
颞平面（PT）是韦尼克区的一部分，对人类语言功能很重要，并且在左半球比右半球更大。在本研究中，我们使用磁共振成像评估了包括21只大猩猩、4只长臂猿、11只旧世界猴和8只新世界猴在内的非人类灵长类动物样本中PT的存在和大小。通过使用多平面重组软件在矢状面和冠状面测量PT。PT仅在大猩猩样本中可识别，而在其余非人类灵长类物种中无法识别。在大猩猩样本中，在统计学上大多数受试者的左半球PT比右半球大。这些结果与以下观点一致，即PT大约在1500万年前进化为可定义的结构，可能是由于选择了更大的皮质折叠，这反过来又导致了更大脑容量中的脑回化增加。
