Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology最新文献_第4页

Fibre size in the left and right recurrent laryngeal nerves (RLNs) in the man. 男性左右喉返神经(RLNs)纤维大小。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-10-01

F Repice, S Coscarelli, L Rucci

{"title":"Fibre size in the left and right recurrent laryngeal nerves (RLNs) in the man.","authors":"F Repice, S Coscarelli, L Rucci","doi":"","DOIUrl":"","url":null,"abstract":"Some morphological data of the right and left human RLNs were evaluated with the aim of verifying possible differences in the fibre composition of the two nerves. The following parameters were evaluated in the right and left RLNs of five human cases: 1) the maximum diameter of the fibres; 2) the axon diameter and area; 3) the myelin sheath area obtained substracting the axon area from the total area of each fibre. The obtained data were plotted on histograms for each case: moreover, histograms of all fibres of both left and right nerves of all five cases were made. The results show that the values of the maximum diameter of the fibres and of the myelin sheath area are always greater in a statistically significant way in the left RLNs than in the right RLNs. On the other hand the axon diameter is nearly the same in the nerves of both sides. These data suggest that the greater calibre of the myelin sheath in the fibres of the left inferior laryngeal nerve can be responsible of the faster conduction speed in this nerve. This fact might explain the simultaneous arrival of the impulses to the laryngeal muscles of the two sides in spite to the different length of the two nerves.","PeriodicalId":75549,"journal":{"name":"Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology","volume":"95 3-4","pages":"229-36"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13257676","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

Allometry of hepatic weight growth in human staged fetuses. 人类分期胎儿肝脏体重生长的异速生长。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-10-01

G F Ferreira, R M Rega, C A Mandarim-De-Lacerda

引用次数: 0

[An atrial hematopoietic locus in the heart of the cave salamander (urodele amphibian)]. [穴螈(尾纲两栖动物)心脏的心房造血位点]。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-10-01

M Stefani, F Loffredo, S Spiga, G P Serra

{"title":"[An atrial hematopoietic locus in the heart of the cave salamander (urodele amphibian)].","authors":"M Stefani, F Loffredo, S Spiga, G P Serra","doi":"","DOIUrl":"","url":null,"abstract":"Lungless Salamanders of the family Plethodontidae have a reduced interatrial septum. The pulmonary vein is lacking. In these species, the septum as a membranous thin sheet attaches near the dorsal lip of the sino-atrial valve where a connective and muscular column, supporting the valve, extends its branches over the upper wall of the undivided atrial cavity where a sponge-like structure is formed. The meshes of this structure are the site of a erythropoietic activity as shown in the plates. Early stages in active reproduction are found in the external acid layer while in the basic inner layer the red cells undergo differentiation. This locus may be correlated to the particular anatomy of the heart concerning the lacking of the pulmonary vein, the position of the sino-arterial aperture shifted to the left side and the reduced interatrial septum. In the large upper cavity of the atrium a certain degree of blood stagnation could be possible which could allow the settlement of this locus. No ventricular erythropoiesis nor epicardial granulopoiesis have been found. This hemopoietic locus is lacking in the family Salamandridae and Anura.","PeriodicalId":75549,"journal":{"name":"Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology","volume":"95 3-4","pages":"173-80"},"PeriodicalIF":0.0,"publicationDate":"1990-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13256957","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

Early and transient osteopetrosis in microphthalmic MIB-rats. 小眼型mib大鼠的早期和短暂性骨质疏松。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-10-01

A Wojtowicz, R Moutier, W Grzesik, A Dziedzic-Goclawska, H Lamendin, K Ostrowski

引用次数: 0

[Use of synthetic resin cases for the scanning electron microscopic study of the kidney tubule system]. 【利用合成树脂病例对肾小管系统进行扫描电镜研究】。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-04-01

L Magaudda, G Cutroneo, S De Leo, A Pisani, G Santoro, G Anastasi

引用次数: 0

[Distribution of saccharide residues in glycoconjugates of the kidney in Gallus domesticus using peroxidase-conjugated lectins]. [利用过氧化物酶结合凝集素研究家鸡肾脏糖缀合物中糖残基的分布]。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-04-01

S Gheri Bryk, G Gheri

{"title":"[Distribution of saccharide residues in glycoconjugates of the kidney in Gallus domesticus using peroxidase-conjugated lectins].","authors":"S Gheri Bryk, G Gheri","doi":"","DOIUrl":"","url":null,"abstract":"A battery of seven different horseradish-peroxidase labelled lectins (DBA, PNA, SBA, UEA I, WGA, ConA, LTA) was used to study the distribution of sugar residues in the glycoconjugates along the nephron and the collecting duct of the kidney of Gallus domesticus. As far as the glomerular components are concerned, we have demonstrated that the podocytes and, with a lesser extent, the mesangial cells are characterised by the presence of D-mannose, D-galactose-(beta 1- greater than 3)-N-acetyl-D-galactosamine and sialic acid. The glomerular capillary wall shows the presence of the disaccharide D-galactose-(beta 1- greater than 3)-N-acetyl-D-galactosamine and sialic acid. With regards to the tubules, the proximal tubule, the descending limb of the loop of Henle, the connecting tubule and the collecting one, are characterised by N-acetyl-D-galactosamine, (1- greater than 6)-alpha-L-fucose, D-mannose, N-acetyl-D-galactosamine and D-galactose-(beta 1- greater than 3)-N-acetyl-D-glucosamine. The cells of the connecting and collecting ducts show the presence of intracellular sialic acid, found also as component of the mucous secretion. The ascending limb of the loop of Henle and the distal tubule contain only three saccharidic residues, i.e. (1- greater than 6)-alpha-L-fucose, D-mannose and N-acetyl-D-glucosamine. Lectin histochemistry was also useful to define the saccharidic components of the mucus, which is normally present within the connecting and collecting ducts of the kidney of the birds. The cellular variability of the connecting and the collecting ducts is similar to that found in the kidney of some mammals. Such a variability seems to suggest a possible cell specialization along a single kidney tubule.","PeriodicalId":75549,"journal":{"name":"Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology","volume":"95 2","pages":"137-54"},"PeriodicalIF":0.0,"publicationDate":"1990-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13233450","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

Effect of vitamin E-deficiency on regeneration of the sciatic nerve. 维生素e缺乏对坐骨神经再生的影响。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-04-01

T Cecchini, R Cuppini, S Ciaroni, P Del Grande

{"title":"Effect of vitamin E-deficiency on regeneration of the sciatic nerve.","authors":"T Cecchini, R Cuppini, S Ciaroni, P Del Grande","doi":"","DOIUrl":"","url":null,"abstract":"The regeneration of the sciatic nerve fibres was studied in both normal and vitamin E-deficient rats at 30 and 60 days after crush. The vitamin E is involved in one of the most important mechanisms of protection against peroxidation of plasma membrane lipids; the plasma membrane plays certainly a role in nerve regeneration. Both the diameter and the total number of myelinated nerve fibres was calculated at different times. The number of myelinated fibres in the undenervated deficient animals was lower than that found in the undenervated normals animals. Following the nerve crush, in normal animals after two months the number of myelinated fibres exceeded the number found in undenervated normal animals, whereas in the deficient rat nerves it was significantly lower than in the corresponding controls and moreover it did not even reach the number found in the nerves of undenervated deficient rats. Finally, the caliber distribution of myelinated fibres in undenervated and denervated deficient rats shows a relative percent increase in the number of greatest axons and a decrease in smaller axons. This result confirm the vitamin E to be an important factor of the normal process of nerve regeneration.","PeriodicalId":75549,"journal":{"name":"Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology","volume":"95 2","pages":"155-65"},"PeriodicalIF":0.0,"publicationDate":"1990-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13233457","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

Seasonal changes of parafollicular and follicular cells of the dormouse thyroid (Myoxus glis): an ultrastructural and immunocytochemical study. 睡鼠甲状腺滤泡旁和滤泡细胞的季节性变化:超微结构和免疫细胞化学研究。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-04-01

G Azzali, G Orlandini, R Gatti, G Bucci

{"title":"Seasonal changes of parafollicular and follicular cells of the dormouse thyroid (Myoxus glis): an ultrastructural and immunocytochemical study.","authors":"G Azzali, G Orlandini, R Gatti, G Bucci","doi":"","DOIUrl":"","url":null,"abstract":"The follicular epithelium of dormouse thyroid consists of two distinct cellular types, follicular and parafollicular cells. Parafollicular cells can be easily identified by their high cytoplasmic dye-affinity for phloxine, round to ovoid shape, basal arrangement and lack of contact with follicular colloid. The wide cytoplasmic matrix is clear and contains many secretory granules of variable electron density whose contents histochemically appears to be proteic with a lean glucidic component. Furthermore immunocytochemical reactions with antibodies against calcitonin and somatostatin showed that both hormones are co-stored in the secretory granules of all parafollicular cells. Both follicular and parafollicular cells show seasonal morphological variations in their secretory activity. Follicular cell activity is high in summer, reaches a peak in late fall or prehibernation and progressively slows down throughout hibernation. Parafollicular cells exhibit a fair synthetic activity in summer, in fall, and in the animals captured during winter hibernating sleep and killed after 12 days stay in laboratory. In winter sleep, granules with interrupted membrane and cottony contents are prevalent and the ultrastructural aspects suggest an intense discharge of secretion. The results are compared with those from other hibernating mammalians and discussed in the light of blood calcium values and seasonal balances of other metabolisms.","PeriodicalId":75549,"journal":{"name":"Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology","volume":"95 2","pages":"113-36"},"PeriodicalIF":0.0,"publicationDate":"1990-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"13139752","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

Mechanisms of regulation of the capillary bed in the human chorionic villi. 人绒毛膜绒毛毛细血管床的调节机制。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-04-01

G Tedde, A Pirino, F Esposito, G Fenu

引用次数: 0

[The average thickness of trabecular osteons in the iliac crest in normal subjects]. [正常人髂骨骨小梁的平均厚度]。

Archivio italiano di anatomia e di embriologia. Italian journal of anatomy and embryology Pub Date : 1990-01-01

E Mainetti, V Sansone, M Novarina, M Arlot

引用次数: 0