A New Look at an Old Canal

被引:12
作者
Marom, Assaf [1 ]
机构
[1] Tel Aviv Univ, Sackler Fac Med, Dept Anat & Anthropol, IL-69978 Tel Aviv, Israel
来源
SKULL BASE-AN INTERDISCIPLINARY APPROACH | 2011年 / 21卷 / 01期
关键词
Abducens nerve; petrosphenoidal ligament; petrosphenoidal canal; skull base; NERVE;
D O I
10.1055/s-0030-1263282
中图分类号
R74 [神经病学与精神病学];
学科分类号
摘要
Attempts to explain abducens vulnerability have centered around the petroclival segment of its pathway in the skull base, in particular, its relations to the Dorello's canal and the petrosphenoidal ligament of Gruber. This study aims to contribute to the definition of the Dorello's canal and to the understanding of abducens vulnerability from an evolutionary perspective. The petroclival region and the Dorello's canal in particular were examined in a sample of 86 primate skulls. The sample contains 20 Pan troglodytes (common chimpanzee), 35 Gorilla gorilla, 20 Pongo pygmaeus (orangoutan), and 11 Hylobates moloch (gibbon) skulls. Distance between the petrous apex and tip of the posterior clinoid process was measured using a 10-mm scale that was inserted into the endocranium. Complete absence of the Gruber ligament and an uninterrupted osseous circumference of the Dorello's canal (foramen) was demonstrated in all nonhuman primate species. Whatever the reason for the morphological difference between the human and ape Dorello's canal, it is without a doubt suggestive of the source of vulnerability of the abducens nerve, as the ligament of Gruber, unique to the human configuration, renders the contents of the Dorello's canal susceptible to compression against the cranial base.
引用
收藏
页码:53 / 57
页数:5
相关论文
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