Trinkaus E, Churchill S E
Department of Anthropology, University of New Mexico, Albuquerque 87131.
Am J Phys Anthropol. 1988 Jan;75(1):15-21. doi: 10.1002/ajpa.1330750103.
Examination of adult and immature Neandertal radii demonstrates that the medial versus anterior orientations of their radial tuberosities fall within recent human ranges of variation, but on the average their radial tuberosities are significantly more medially, as opposed to anteromedially, oriented. This more posterior positioning of their radial tuberosities implies a maintenance of an effective moment arm for M. biceps brachii through the full range of supination, an interpretation which fits with the hypertrophy of and increased moment arms for their forearm pronator muscles. It is an additional indication of the muscular hypertrophy evident elsewhere in Neandertal upper limbs.
对成年和未成年尼安德特人的桡骨进行检查表明，他们桡骨粗隆的内侧与前方朝向落在现代人类的变异范围内，但平均而言，他们的桡骨粗隆明显更偏向内侧，而非前内侧。他们桡骨粗隆的这种更靠后的位置意味着在整个旋后范围内肱二头肌的有效力臂得以维持，这一解释与他们前臂旋前肌的肥大及力臂增加相契合。这是尼安德特人上肢其他部位明显存在肌肉肥大的又一迹象。
