Acta morphologica Neerlando-Scandinavica最新文献_第9页

Alterations in red blood cell morphology during a 500 metre dive. 500米潜水时红细胞形态的变化。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

J A Paciorek, J Onarheim

引用次数: 0

Topographical representation of the jaw muscles within the trigeminal motor nucleus. An HRP study in the mallard, Anas platyrhynchos. 三叉神经运动核内颚肌的地形图。绿头鸭的HRP研究。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

P J den Boer, R G Bout, L J Dubbeldam

引用次数: 0

Contribution of the aortopulmonary septum to the muscular outlet septum in the human heart. 主动脉肺隔对心脏肌肉出口隔的贡献。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

M M Bartelings, A C Wenink, A C Gittenberger-De Groot, A Oppenheimer-Dekker

引用次数: 0

The intestinal loops of bluegill fish, Lepomis macrochirus. 蓝鳃鱼(Lepomis macrochirus)的肠道。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

A Hossain, H M Dutta

引用次数: 0

Proceedings of the 134th meeting of The Netherlands' Anatomical Society. Wageningen, June 8, 1985. Abstracts. 荷兰解剖学会第134届会议论文集。瓦赫宁根，1985年6月8日。摘要。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

引用次数: 0

Principles of hand ontogenesis in man. 人类手部个体发生的原理。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

B Christ, H J Jacob, M Jacob, B Brand

{"title":"Principles of hand ontogenesis in man.","authors":"B Christ, H J Jacob, M Jacob, B Brand","doi":"","DOIUrl":"","url":null,"abstract":"Human hand anlagen of different developmental stages are studied light and scanning electron microscopically. The findings are compared with experimental and ultrastructural results obtained from avian limb anlagen. Shaping, cell differentiation and the spatial arrangement of different cells are found to be the basic processes of hand development. The shaping of the arm and hand seems to anticipate future grasping movements. Factors controlling this developmental process are on the one hand the apical ectodermal ridge (AER) that maintains in the underlying mesoderm a high level of mitotic activity, and on the other hand a species-specific pattern of cell death in different zones of arm and hand. Interdigital cell death, microfilament bundles included in the basal compartment of AER cells, and local anchorings of the AER ectoderm by collagen fibrils are involved in finger separation. The flexion creases are genetically fixed and their development cannot be explained by mechanical factors. It is found that the early hand anlage is already composed of relatively autonomous founder cells committed to different lineages. This is true for the muscle precursor cells which originate from the brachial somites. These migrating somite cells are determined to belong to the myogenic lineage. However, their distribution, mitotic activity and later arrangement in single muscles are controlled by factors localized within the hand itself. Tendons develop autonomously from somatopleural cells. Other already committed cells are the angioblasts forming the endothelial lining of the blood vessels, the neural crest cells differentiating into melanocytes and Schwann cells, and the blood-derived cells like chrondro- or osteoclasts. The differentiation of somatopleural cells into cartilage, connective tissue or smooth muscle depends on their position within the hand anlage. Possible mechanisms leading to the specific pattern are discussed.","PeriodicalId":75392,"journal":{"name":"Acta morphologica Neerlando-Scandinavica","volume":"24 4","pages":"249-68"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14549802","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The variability of the circle of Willis: univariate and bivariate analysis. 威利斯环的变异性:单因素和双因素分析。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

B Hillen

{"title":"The variability of the circle of Willis: univariate and bivariate analysis.","authors":"B Hillen","doi":"","DOIUrl":"","url":null,"abstract":"The results are presented of a statistical analysis of the variability of the circle of Willis using univariate and bivariate methods. For this purpose 100 circles of Willis were available. From each circle 19 indexes of arterial size were determined, the basilar artery was measured in two places. Half the circumference was measured. This data yielded no evidence of differences between left- and right-sided vessels in the sample. An important source of variation is the general size of all vessels considered. When the data are cleared from this general size variation, correlation coefficients reveal interesting relations between the vessels. The posterior communicating arteries are strongly related to the ipsilateral carotid artery, whereas a strong inverse relationship exists with the basilar artery and the precommunicating part of the ipsilateral posterior cerebral artery. These relationships can be understood from the expected patterns of the blood flow in these vessels. Similar relationships can be found in the anterior part of the circle of Willis and in the vertebro-basilar junction. In a different manner, based on previous haemodynamic studies, the relation between blood flow and vessel size within the circle of Willis can be demonstrated by relating the ratios of the sizes of afferent and efferent arteries to the sizes of the posterior communicating arteries, an \"intuitive\" model. The supposed correlations of the outcome of this \"intuitive\" model with the size of the communicating arteries appeared to by highly significant. It is concluded that the variations of the circle of Willis are related to the individual variations of the blood flow in this arterial network.","PeriodicalId":75392,"journal":{"name":"Acta morphologica Neerlando-Scandinavica","volume":"24 2","pages":"87-101"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14686962","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Caliber and media thickness of intrahepatic arteries in a normal human liver. A morphometric study. 正常人肝脏肝内动脉的直径和中厚。形态计量学研究。

Acta morphologica Neerlando-Scandinavica Pub Date : 1986-01-01

J G Hanstede, P O Gerrits

{"title":"Caliber and media thickness of intrahepatic arteries in a normal human liver. A morphometric study.","authors":"J G Hanstede, P O Gerrits","doi":"","DOIUrl":"","url":null,"abstract":"Morphometrical data on the intrahepatic arterial wall were studied over a wide range of vascular diameters (100-1708 microns) in one human liver. The liver tissue containing Araldite-filled blood vessels was embedded in the water-soluble glycolmethacrylate (GMA). The calculation of the correction factor for the morphometric data obtained from 3 microns sections is described. The influence of formaldehyde fixation on the volume of the liver proves to be negligible. During dehydration a linear shrinkage of about 3% occurs. After infiltration and embedding in GMA only 1% of this shrinkage remains. During the drying phase about 4.3% further linear stretching occurs. No significant \"residual compression factor\" was found. Araldite plays a significant role in the retention of the dimensions of the liver specimen during histologic processing, while the dimensional changes of the Araldite itself are negligible. A positive linear correlation was found between the media thickness and the radius of the vessel. The physiological consequences are discussed. It is concluded that in the morphometric analysis of the arterial wall it is essential to apply a standardized procedure in histologic processing and in the measuring of the inner vascular diameter. The advantages of our method, in which blood vessels are perfused with Araldite under physiological pressure, are discussed.","PeriodicalId":75392,"journal":{"name":"Acta morphologica Neerlando-Scandinavica","volume":"24 4","pages":"281-92"},"PeriodicalIF":0.0,"publicationDate":"1986-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14549804","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A 3H-thymidine autoradiographic study of the development of the cerebellum of the White Leghorn (Gallus domesticus): "evidence for longitudinal neuroblast generation patterns". 一项关于白来鸿小脑发育的3h -胸腺嘧啶放射自显影研究:“纵向神经母细胞生成模式的证据”。

Acta morphologica Neerlando-Scandinavica Pub Date : 1985-10-01

H K Feirabend, E A van Luxemburg, H van Denderen-van Dorp, J Voogd

{"title":"A 3H-thymidine autoradiographic study of the development of the cerebellum of the White Leghorn (Gallus domesticus): \"evidence for longitudinal neuroblast generation patterns\".","authors":"H K Feirabend, E A van Luxemburg, H van Denderen-van Dorp, J Voogd","doi":"","DOIUrl":"","url":null,"abstract":"Dynamic aspects of the development of the cerebellum of the white Leghorn (Gallus domesticus) were examined using 3H-thymidine autoradiography. A single dose of 25 microCi 3H-thymidine was given to embryos varying in age from 0-18 days. The embryos were all studied before hatching, either after short or after long survival times. It appeared that the superficial part of the outer mantle layer (OML-s, or called external granular layer, egl) is histologically present at day 6, but starts its activity as a secondary matrix at day 7, probably due to activation by a secondary influx of cells from the ventricular neuro-epithelium. It was also demonstrated that Purkinje cells and cells of the central cerebellar nuclei are produced by the ventricular neuro-epithelium mainly at days 3, 4 and 5. No birth of these cells was observed beyond day 5. In addition, a relationship was found between the birth patterns of Purkinje cells and cells of the central cerebellar nuclei and the longitudinal cytoarchitectonic patterns as observed in normal Nissl stained material. It was concluded that these birth patterns are an early contribution to the establishment of the longitudinal organization of the cerebellum.","PeriodicalId":75392,"journal":{"name":"Acta morphologica Neerlando-Scandinavica","volume":"23 2","pages":"115-26"},"PeriodicalIF":0.0,"publicationDate":"1985-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"14952159","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Changes in acid phosphatase activity in developing neurons. Intrinsic or extrinsic property? 发育中神经元酸性磷酸酶活性的变化。内在的还是外在的?

Acta morphologica Neerlando-Scandinavica Pub Date : 1985-10-01

R A van Welsum, K E Høynes, J Drukker, P van Dijk

引用次数: 0