The Organization Of The Visual System During Development The Gansu Zokor (myospalax Cansus) Study

Underground rodents such as the blind mole(Spalax ehrenborgi),Haijia blind mole(Georychus capensis),Zambia blind mole(Crytomys anselIi),the blind mole(Cryptomys hottentotus),and Gansu zokor(Myospalax cansus),due to strict business underground hole Road Life,He was living in a dark underground hole Road,the extreme degradation of vision for the study of underground rodents adapt to the evolution of visual system provides an ideal experimental materials.Preliminary studies found that the visual system Gansu zokor still has a photographic capabilities,and a distinction between different wavelengths of light capacity.In this study, morphology,neural anatomy,and other biological technologies,Gansu zokor development of the individual,depending on the structure and major corporations visual structure of nuclear-related research,to investigate the visual system organizations Morphological changes of the Gansu zokor individual development,the results show that:1.Gansu zokor individual development process,the lens size change significantly,his eyelids opened to the dividing line.After eyes opening,the lens size change significantly.Retina in the early development of the individual,not a clear hierarchical,14-day-old,has been able to observe the retinal layers in a clear structure.One INL,OPL and ONL with individual growth and thickening, and the GCL and IPL with the thickness of individual smaller,POS thickness in the process of development without significant changes.2.The optic nerve development is divided into two phases,30-day-old before the diameter of the optic nerve was slowly increasing,and the diameter of the optic nerve was born 30-day-old showed a sharp increase in the rate of increase of 71%.3.Suprachiasmatic nucleus in Gansu zokor development of the individual has been increased,while within the nuclei of neurons in the 30-day-old former no significant change,and after birth 1-2 months SCN neurons density was a significant increase until sub-Adult period,the neurons began no significant changes.4.Dorsal lateral geniculate body in Gansu nuclear zokor before and after birth have significant differences,DLG relative volume in the development of the individual at first increase after decreasing trend.And the density of neurons has been an increasing trend in the show.5.The relative size of Olives in the roof were in the show of rising in the visual system development.In birth 7 to Adult period of the development process,OPN existence of a relatively significant volume increase,while OPN density of neurons in the nucleus also accompanied by increased volume and gradually increased. In short,Gansu zokor visual system development and other rodents have differences,but for its development of the existing differences can not be a good explanation,this needs further study.