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北京鸭小脑脊髓束的起源,终止和细胞构筑—HRP法研究   总被引:1,自引:0,他引:1  
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北京鸭60例,分别在其脊髓一侧的外侧索、腹侧索或灰质中引入HRP,冰冻切片,蓝色反应法显色,中性红复染.结果发现,从延髓到脑桥这一范围的中缝核群内,出现了大量的标记细胞,而在脑桥吻侧以上的中缝核内出现的标记细胞很少.研究结果表明:北京鸭存在着比较发达的中缝脊髓下行传导通路,它主要起始于中缝大核、中缝隐核和中缝苍白核,而这一通路是位于脊髓的外侧索与腹侧索.  相似文献   

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鸡红核和蓝斑核的细胞构筑及其5-HT神经元的分布研究   总被引:3,自引:0,他引:3  
光镜下观察鸡脑内红核、蓝斑核细胞构筑及其5-羟色胺神经元分布情况,结果表明:红核没有明显的亚核划分,由大、中、小3种细胞构成;鸡脑内有蓝斑核存在,核团呈横向宽、背腹向扁的板状,位于脑桥前部的室底灰质腹外侧区,被盖背外侧核后方,主要由小型细胞构成。用免疫组织化学SP法的研究结果表明红核和蓝斑核内有5-HT阳性神经元分布,这在禽类属首次提出。  相似文献   

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采用HRP逆行追踪法,研究了北京鸭小脑脊髓束的起源、细胞构筑及终止范围。分别在脊髓的颈部、胸部和腰部注射30%~50%HRP,灌注固定,冰冻连续切片。BDHC法显色,中性红复染。在颈前部脊髓注射HRP后,对侧小脑内侧核中出现了大量的标记细胞,对侧小脑皮质的蒲金野细胞层中也发现了一些标记细胞。当沿脊髓向后注射HRP,则标记细胞依次明显减少,而蒲金野细胞层中未见到标记细胞。在C9以后的各部注入HRP,小脑各核与蒲金野细胞层中都不再出现标记细胞。结果表明,北京鸭小脑核可划分为内侧核、中间核和外侧核,小脑脊髓束主要起始于小脑对侧深部的内侧核,其下行投射范围只能抵达脊髓的颈中部;小脑皮质的少量蒲金野细胞也可直接发出投射纤维到颈段脊髓。  相似文献   

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禽类蓝斑和蓝斑下核至脊髓传导通路的起源与细胞结构   总被引:1,自引:0,他引:1  
为了探明禽类蓝斑与蓝斑下核至脊髓传导通路的起源的细胞结构,采用HRP微量注射法和微电泳法对北京鸭、麻鸭、鸡、鸽、鹌鹑和鹅6种主要家禽进行了逆行追踪的综合性研究。实验结果发现,在6种动物一侧脊髓的外侧索或背侧索的外侧,于颈中部、颈膨大部或腰膨大部分别引入HRP后,各种动物的同侧蓝斑核内出现了大量的标记细胞;而双侧的蓝斑下核中出现了一些散在性的标记细胞。两核团内的标记细胞胞体呈梭形或多角形。蓝斑核内的  相似文献   

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家禽动眼神经核簇的细胞构筑及其5-HT神经元的分布   总被引:1,自引:0,他引:1  
用Nissi染色法和免疫组化SP法研究鸡、北京鸭、鸽子的动眼神经核簇细胞构筑及5-羟色胺神经元分布情况,结果表明:北京鸭的动眼神经核簇系由动眼神经核、E—W核和前背外侧核3个部分所构成,而在鸡和家鸽仅包括动眼神经核和E—W核。他们的核团形态和细胞构筑基本相同。观察到5-HT阳性神经元在鸡、鸭和鸽子动眼神经核及鸡E—W核内的分布,而在鸭和鸽子的E—W核和鸭的前背外侧核内却未见分布。动眼神经核5-HT阳性神经元的数量较多,在各个亚核的分布均匀,胞体着色较深。  相似文献   

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The aim of this research work was to study the histological structure of the pancreatic acini by transmission electron microscope in two avian species, duck and pigeon. The specimens were collected and processed for electron microscopic study. The results showed that the acini of the two avian species were two types; the first one was an electron dense and the second one an electron lucent. The light acinar cells were larger in size than the dark cells. These cells contained centrally located ovoid nuclei with prominent nucleoli and abundant euchromatin. The cytoplasm was electron lucent, with many rough endoplasmic reticulum, polymorphic mitochondria. Numerous zymogen granules were distributed in the basal part and around the nucleus, so these cells considered active cells. The dark acinar cells were characterized by an electron dense cytoplasm. The most prominent cell organelle in these cells were the zymogen granules that appeared in different sizes while other organelles as mitochondria, and rough endoplasmic reticulum were inconspicuous or few, so these cells were considered as inactive cells. The nucleus with indented nuclear membrane located centrally with prominent nucleoli and abundant heterochromatin. Prominent intercellular spaces between the individual acinar cells, as well as well-developed basement membrane separating the electron dense cells and the lumen contained the secretion between acinar cells. It could be concluded that the acinar cells in ducks and pigeons were divided into two types, that is, light and dark acinar cells which mainly attributed to the activity of these cells.  相似文献   

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鸡和鹌鹑形态上有很大差异 ,且鹌鹑精液在体外的存活时时间很短 ,大约 (12± 4 )min。为了深入地研究鸡与鹌鹑的属间杂交 ,研究通过鸡 (♂ )×鹌鹑 (♀ )正交和鹌鹑 (♂ )×鸡 (♀ )反交人工授精试验 ,对输入精液后每隔 1,4 ,7,9h解剖母禽观察其生殖道结构、电导率及其内分泌的酸碱度。结果表明 :鸡和鹌鹑生殖道分泌物 pH值、电导、长度都有很大差异。通过显微观察 ,鸡 (♂ )×鹌鹑 (♀ )正交及鹌鹑 (♂ )×鸡 (♀ )反交后 ,其精子在体内的存活时间长于 1h ,鹌鹑精液大大长于在体外的存活时间 ,精子能在 1h后到达漏斗部。  相似文献   

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In this study, volume densities of white and grey matters of cervical segments of spinal cords of quail were investigated stereologically. In both sexes, mature, six quails were used as material of this study. All animals were fixed by perfusing in 10% buffered formalin. Tissue specimens were obtained from cervical spinal cords. These tissue specimens were cut every fiftieth section at 5 μm thickness by a microtome. And mean six or seven sections were examined from every block by this method at microscope. After that, these sections were stained by haematoxylin eosin and photographed. Densities of volumes of all tissues of cervical segments of whole spinal cords and white and grey matters were calculated with principle of Cavalieri. As a result, total volume of spinal cord, volumes of white and grey matters of cervical segment and volume rates of white and grey matters were calculated.  相似文献   

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以蔗糖密度梯度离心提纯的Ⅰ型鸭肝炎病毒(DHV—Ⅰ)免疫兔制备兔抗DHV—Ⅰ抗体,建立了检测石蜡组织切片中DHV—Ⅰ抗原的间接免疫酶染色(indirect immunoperoxidase staining,ⅡS)方法,并对DHV—Ⅰ强毒人工感染死亡或濒死雏鸭的各个组织器官进行了检测。结果表明,ⅡS与DHV—Ⅰ感染死亡或濒死雏鸭的肝等呈现阳性反应,与鸭瘟病毒、鸭疫里默氏杆菌、大肠杆菌、沙门菌、多杀性巴氏杆菌感染发病和死亡雏鸭的肝以及健康雏鸭的肝呈现阴性反应。感染DHV—Ⅰ死亡或濒死雏鸭的肝、脾、肾、心、胸腺、腔上囊、胰腺、十二指肠、盲肠、空肠、回肠、直肠的免疫组织化学检测呈阳性或强阳性,DHV—Ⅰ抗原主要分布于感染细胞的细胞质。该ⅡS法具有良好的特异性,可用于DHV—Ⅰ在感染雏鸭组织细胞中的亚细胞定位、DHV—Ⅰ感染雏鸭的实验室诊断、甲醛固定组织的回顾性诊断。  相似文献   

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In the study, total segment, grey matter and white matter volume values of lumbosacral segment of spinal cord in quails (Coturnix coturnix japonica) were stereologically examined. Regardless of sex, six adult quails were used as material. After the materials were perfused, they were dissected and their spinal cords were uncovered. Tissue samples were taken from each lumbosacral segment of spinal cord. After the tissue fixation process, 6–7 sections having a 5‐µm thickness were separated in every 50th section as from the first section, where the tissue was seen, among tissue samples of each segment. These segments were stained with haematoxylin–eosin staining. They were photographed via a microscope. By using the Cavalieri's principle, the volume values of both the total segment, grey matter (GM) and white matter (WM) in each lumbosacral segment were separately calculated. All these calculations were performed by using SHTEREOM 1.5 program. As a result, total volume, grey matter and white matter volume values of lumbosacral segments and white matter/total volume, grey matter/total volume, and grey matter/white matter volume fractions were obtained.  相似文献   

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H7N9 virus infection is a global concern, given that it can cause severe infection and mortality in humans. However, the understanding of H7N9 epidemiology, animal reservoir species and zoonotic risk remains limited. This work evaluates the pathogenicity, transmissibility and local innate immune response of three avian species harbouring different respiratory distribution of α2,6 and α2,3 SA receptors. Muscovy ducks, European quails and SPF chickens were intranasally inoculated with 105 embryo infectious dose (EID)50 of the human H7N9 (A/Anhui/1/2013) influenza isolate. None of the avian species showed clinical signs or macroscopic lesions, and only mild microscopic lesions were observed in the upper respiratory tract of quail and chickens. Quail presented more severe histopathologic lesions and avian influenza virus (AIV) positivity by immunohistochemistry (IHC), which correlated with higher IL‐6 responses. In contrast, Muscovy ducks were resistant to disease and presented higher IFNα and TLR7 response. In all species, viral shedding was higher in the respiratory than in the digestive tract. Higher viral shedding was observed in quail, followed by chicken and ducks, which presented similar viral titres. Efficient transmission was observed in all contact quail and half of the Muscovy ducks, while no transmission was observed between chicken. All avian species showed viral shedding in drinking water throughout infection.  相似文献   

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