Van Der Gucht Estel, Youakim Michele, Arckens Lutgarde, Hof Patrick R, Baizer Joan S
Laboratory of Neuroplasticity and Neuroproteomics, Katholieke Universiteit Leuven, Leuven, Belgium.
Anat Rec A Discov Mol Cell Evol Biol. 2006 Jul;288(7):753-75. doi: 10.1002/ar.a.20350.
Anatomical and electrophysiological studies have revealed a complex organization in the macaque prelunate gyrus. We investigated the morphology and architecture of the prelunate gyrus in Old World monkeys. In Macaca nemestrina, we observed a sulcus crossing the prelunate gyrus within 2 mm of the vertical meridian representation. In other macaque species and other cercopithecines, we observed substantial variations in sulcal morphology across the prelunate gyrus. We did not find a sulcus in all species, and the location and depth of that indentation on the gyrus varied among species. A deep sulcus was observed in all species that emerged earlier in evolution than macaques, such as guenons, baboons, and colobines. We analyzed the regional and parcellation features of the prelunate gyrus in three macaque species, M. maura, M. mulatta, and M. radiata, and in Erythrocebus patas, with emphasis on the relation of structure to the distribution of prelunate visual areas. Nonphosphorylated neurofilament protein immunoreactivity permitted the delineation of a novel area in the prelunate gyrus of Old World monkeys, located around the prelunate sulcus. Species-specific patterns were also observed in the prelunate gyrus of the patas monkey compared to macaques. These observations, as well as a cladistic analysis of the data, suggest an expanded and diversified organization of the prelunate gyrus in some cercopithecoids that may reflect adaptation to specific ecological environments. It was, however, progressively lost in most macaques, being retained only in species that diverged early in the evolution of the genus Macaca, such as M. nemestrina and M. maura.
解剖学和电生理学研究揭示了猕猴前月状回的复杂结构。我们研究了旧世界猴前月状回的形态和结构。在豚尾猕猴中，我们观察到一条沟在垂直子午线代表点2毫米范围内穿过前月状回。在其他猕猴物种和其他猕猴科动物中，我们观察到前月状回上沟的形态存在显著差异。我们并非在所有物种中都发现了这条沟，并且该沟在回上的位置和深度在不同物种间也有所不同。在所有进化上比猕猴更早出现的物种中都观察到了一条深沟，如长尾猴、狒狒和叶猴。我们分析了三种猕猴物种（食蟹猴、恒河猴和放射猴）以及赤猴前月状回的区域和分区特征，重点关注结构与前月状视觉区域分布的关系。非磷酸化神经丝蛋白免疫反应性使得能够在前月状沟周围的旧世界猴前月状回中勾勒出一个新区域。与猕猴相比，在赤猴的前月状回中也观察到了物种特异性模式。这些观察结果以及对数据的分支分析表明，在一些猕猴科动物中前月状回的结构有所扩展和多样化，这可能反映了对特定生态环境的适应。然而，在大多数猕猴中这种结构逐渐消失，仅在猕猴属进化早期分化出来的物种中保留，如豚尾猕猴和食蟹猴。
