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大脑皮层成像技术的发展
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作者 吕红 张德昌 《医疗卫生装备》 CAS 1999年第2期12-13,共2页
关键词 大肠皮层 成像技术 脑电源模型
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Reevaluation of cortical developmental patterns in Euplotes(s.l.), including a morphogenetic redescription of E.charon (Protozoa,Ciliophora,Euplotida) 被引量:4
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作者 邵晨 马洪钢 +2 位作者 高珊 AL-RASHEID A.Khaled 宋微波 《Chinese Journal of Oceanology and Limnology》 SCIE CAS CSCD 2010年第3期593-602,共10页
We documented the pattern of cell development in Euplotes charon. The ontogenesis of this species was similar to many of its congeners, except for the formation of the caudal cirri. In E. Charon, a caudal cirrus is fo... We documented the pattern of cell development in Euplotes charon. The ontogenesis of this species was similar to many of its congeners, except for the formation of the caudal cirri. In E. Charon, a caudal cirrus is formed posterior to each of the rightmost two or three dorsal kinety anlage in the proter, and the second rightmost dorsal kinety in the opisthe. In addition, two caudal cirri are formed posterior to the rightmost dorsal kinety in the opisthe. This pattern of development represents a completely new type. Based on our evaluation, and in comparison with previous studies, we also conclude that the pattern of cell development is variable among species in the Euplotes genera. The variation is particularly evident during the formation of frontoventral and caudal cirri. Based on the segmentation pattern of frontal-midventral transverse cirral anlagen, cirri reduction, and migration of frontoventral cirri, we identified five types: the affinis-type, the eurystomus-type, the charon-type, the raikovi-type and orientalis-type. Euplotes (s. l.) can also be divided into three types based on the formation of caudal cirri: focardii-type, vannus-type and charon-type. Indeed, we conclude that the number (one or two) of marginal cirri should be given as much consideration as the genetic separation. Given this, we reassessed the validity of using genetic separation to classify the group. Generally, the morphogenetic data disagreed with the molecular data (SSrRNA gene sequences). Given these discrepancies, it is too early to draw conclusions on the systematic arrangement of this species-rich taxon. 展开更多
关键词 EUPLOTES CILIATE ONTOGENESIS phylogeny sequences
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