Looking for the lunate sulcus: A magnetic resonance imaging study in modern humans

被引:46
作者
Allen, John S. [1 ]
Bruss, Joel
Damasio, Hanna
机构
[1] Univ So Calif, Dornsife Cognit Neurosci Imaging Ctr, Los Angeles, CA 90089 USA
[2] Univ So Calif, Dept Anthropol, Los Angeles, CA 90089 USA
[3] Univ So Calif, Dept Psychol, Los Angeles, CA 90089 USA
[4] Univ Iowa, Coll Med, Dept Neurol, Div Cognit Neurosci & Behav Neurol, Iowa City, IA USA
来源
ANATOMICAL RECORD PART A-DISCOVERIES IN MOLECULAR CELLULAR AND EVOLUTIONARY BIOLOGY | 2006年 / 288A卷 / 08期
关键词
brain; occipital lobe; visual cortex; evolution; endocast;
D O I
10.1002/ar.a.20362
中图分类号
R602 [外科病理学、解剖学]; R32 [人体形态学];
学科分类号
100101 [人体解剖与组织胚胎学];
摘要
The position of the lunate sulcus in fossil endocasts (when it can be determined) may serve as a potential marker of cognitive development in extinct hominid species. While the lunate sulcus is reliably present in the brains of great apes and forms the anterolateral boundary of the primary visual cortex, in humans its presentation is much more variable, and even if present, it does not correspond to a functional region. Grafton Elliot Smith, who named the lunate sulcus, claimed that it was homologous in humans and the great apes. Using high-resolution MRI, we assessed the presence/absence and course of the lunate sulcus in 110 adult subjects. We found that in the vast majority of cases, Innate sulci identified on the surface of the occipital lobe are actually composed of smaller sulcal segments that converge into an apparently continuous composite lunate sulcus. We found only 3 examples in 220 hemispheres (1.4%) of continuous Innate sulci that resembled ape lunates in form (albeit in a more posterior position). Composite lunate sulci were found in 32.7% of left hemispheres and 26.4% of right hemispheres. These results, combined with those from histological and functional imaging studies, indicate that human and ape lunate sulci are not homologous structures. We suggest that the extent of functional reorganization of the occipital region during hominid evolution has been underestimated, and that changes in this region were not just passively shaped by expansion of parietal association cortex.
引用
收藏
页码:867 / 876
页数:10
相关论文
共 57 条
[1]
Sexual dimorphism and asymmetries in the gray-white composition of the human cerebrum [J].
Allen, JS ;
Damasio, H ;
Grabowski, TJ ;
Bruss, J ;
Zhang, W .
NEUROIMAGE, 2003, 18 (04) :880-894
[2]
Normal neuroanatomical variation in the human brain: An MRI-volumetric study [J].
Allen, JS ;
Damasio, H ;
Grabowski, TJ .
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 2002, 118 (04) :341-358
[3]
ALLMAN JM, 1988, COMP PRIMATE BIOL, V4, P279
[4]
Brodmann's areas 17 and 18 brought into stereotaxic space - Where and how variable? [J].
Amunts, K ;
Malikovic, A ;
Mohlberg, H ;
Schormann, T ;
Zilles, K .
NEUROIMAGE, 2000, 11 (01) :66-84
[5]
[Anonymous], BRAINDANCE
[6]
[Anonymous], LOCALISATION CEREBRA
[7]
Extrastriate body area in human occipital cortex responds to the performance of motor actions [J].
Astafiev, SV ;
Stanley, CM ;
Shulman, GL ;
Corbetta, M .
NATURE NEUROSCIENCE, 2004, 7 (05) :542-548
[8]
BROADFIELD D, 2005, AM J PHYS ANTHR S, V40, P81
[9]
The minicolumn hypothesis in neuroscience [J].
Buxhoeveden, DP ;
Casanova, MF .
BRAIN, 2002, 125 :935-951
[10]
Morphological differences between minicolumns in human and nonhuman primate cortex [J].
Buxhoeveden, DP ;
Switala, AE ;
Roy, E ;
Litaker, M ;
Casanova, MF .
AMERICAN JOURNAL OF PHYSICAL ANTHROPOLOGY, 2001, 115 (04) :361-371