Comparative Research On Cytoarchitecture Of Hypothalamic Nucleus Of Chicken In Different Reproductive Periods

The quantitive dentity, average square , long axis, short axis, rate of appearance of cells of hypothalamic nuclei in different reproductive periods are studied by using the method of hematoxylin-eosin(H-E)staining. The results are follows:1 .The quantitive dentity, average square , long axis, short axis of cells and rate of appearance of three kinds of cells of hypothalamic nuclei are changed, and the change of some parameters are more obviouse in egg-laying fastigium than pro-egg-laying and post-egg-laying.2.Nuclei of hypothalamus in chichen are mostly consisted of triangular cells, circular cells, olivary cells, shuttle cells and a few polygonal cells, but the rate of appearance of bigger cells in nucleus supraopticus and nucleus paraventricularis hypothalamica is more than other ones of hypothalamicus.3.There are four kinds of changing of quantitive dentity of the same nucleus of hypothalamicus in pro-egg-laying, egg-laying fastigium, and post-egg-laying. One is ascension, which incudes periventricularis preopticus nucleus, nucleus paraventricularis preopticus,lateralis mamilliary nucleus. Second is ascension and then decline , which includes nucleus ligament! diagonalis Broca, commissurae pallii nucleus , supraopticus pars diffuses nucleus. Third is decline, which includes commissurae anterioris nucleus, regio preoptic lateralis, nucleus supraopticus, nucleus periventricularis arcuatus,regio hypothalamic lateralis, nucleus mamillaris medialis and nucleus ectomamillaris. Fouth is decline and then ascension, which -includes regio preoptic medialis, nucleus hypothalamic parvocellularis, nucleus paraventricularis hypothalamic, regio hypothalamic lateralis, nucleus supramamillaris interstitialis. The above regularities suggest the changes of cell quantity of nuclei are according to in different reproductive periods.4.There are four kinds of changing regularity of average square of cells in same nucleus of hypothalamicus in pro-egg-laying, egg-laying fastigium, and post-egg-laying. One is ascension,which includes nucleus ligamenti diagonalis Broca, nucleus paraventricularis hypothalamicus, supraopticus pars diffuses nucleus . Second is asension and then decline, which includes periventricularis preopticus nucleus, nucleus supraopticus,regio hypothalamic medialis. Third is decline,which includes commissurae anterioris nucleus, commissurae pallii nucleus , regio preoptic lateralis, nucleus preoptic paraventricularis, nucleus periventricularis arcuatus,regio hypothalamicus lateralis. Fouth is decline and then ascension, which includes regio preoptic medialis, nucleus hypothalamic parvocellularis, nucleus supramamillaris interstitialis, nucleus mamillaris medialis, lateralis mamilliary nucleus, nucleus ectomamillaris.The above changing regularities show that the changes of size of nerve cell in hypothalamica nuclei changes with different reproductive periods, and farther verifies the coherence of morphological changes and function of nerve cell.5.There are three kinds of changing regularity of rate of appearance of bigger and less cell in same nucleus of hypothalamicus during different reproductive periods. One is sension of quantity of less cell, while decline of quantity of bigger cell, which includes commissurae anterioris nucleus, commissurae pallii nucleus , nucleus periventricularis arcuatus, regio hypothalamic medialis. Second is asension and then decline of quantity of less cell while decline and then asension of quantity of bigger cell, which includes regio preoptic medialis, regio preoptic lateralis, supraopticus pars diffusa, nucleus preopticparaventricularis, nucleus hypothalamic parvocellularis, nucleus supramamillaris interstitialis, nucleus mamillaris medialis, lateralis mamilliary nucleus, nucleus ectomamillaris. Third is decline and then ascension of quantity of less cell, while asension and then decline of quantity of bigger cell, which includes nucleus ligomenti diagonalis Broca, nucleus preoptic periventricularis, nucleus supraoptic, regio hypothalamic lateralis.The above r...