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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Surgical and radiologic anatomy 15 (1993), S. 187-192 
    ISSN: 1279-8517
    Keywords: Artery ; Foot ; Three-dimensional arteriograms ; Great toe ; Second toe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'artériographie en trois dimensions a été utilisée pour analyser la vascularisation artérielle de l'hallux et du deuxième orteil de cent pieds de cadavres jusqu'au niveau microchirurgical. Ces renseignements aideront au succès des transferts de tissus composites de ces orteils vers la main. La vascularisation artérielle de l'hallux vient principalement de la première artère métatarsienne dorsale (78 %) et de la première artère métatarsienne plantaire (22 %) et secondairement des artères tarsiennes médiales et des trois branches terminales de l'artère plantaire médiale. Pour le deuxième orteil, la première artère métatarsienne dorsale (78 %) et la première artère métatarsienne plantaire (22 %) vascularisent le versant médial, la deuxième artère métatarsienne dorsale (78 %) et la deuxième artère métatarsienne plantaire (22 %) vascularisent le versant latéral. Sept dispositions artérielles ont été trouvées dans la commissure interdigitale. Une disposition dénommée “commune” a été vue dans la premiere commissure sur 65 % des pieds examinés, dans la deuxième commissure dans 85 % des cas. Le premier espace intermétatarsien contient parfois une volumineuse artère, naissant directement de l'artère dorsale du pied ou de la première artère perforante proximale, mais aussi des premières artères métatarsiennes dorsale ou plantaire. Dans cet espace, les dispositions artérielles sont classées en 4 types et 9 sous-types, basés sur l'origine et le trajet proximal de ces artères. La disposition standard a été trouvée seulement sur 19 % des pieds, alors qu'une disposition comprenant un tronc proximal commun situé sur le versant plantaire, fournissant les premières artères métatarsiennes dorsale et plantaire, a été trouvée plus fréquemment (46 %). Dans le deuxième espace intermétatarsien, la deuxième artère métatarsienne dorsale était habituellement située sur le versant dorsal.
    Notes: Summary Three-dimensional arteriography was used to analyse the arterial supply of the great and second toes of 100 cadaveric feet down to the microsurgical level. This information will aid in successful composite tissue transfers of these toes to the hand. The arterial blood supply of the great toe came principally from the first dorsal metatarsal a. (78%) and the first plantar metatarsal a. (22%), and secondarily from the medial tarsal aa. and the three terminal branches of the medial plantar a. For the second toe, the first dorsal metatarsal a. (78%) and the first plantar metatarsal a. (22%) supplied blood from the medial side, and the second dorsal metatarsal a. (78%) and the second plantar metatarsal a. (22%) supplied blood from the lateral side. Seven arterial patterns were found in the interdigital web space. The socalled general pattern was seen in the first web space in 65% of the feet examined. In the second web space it was found in 85%. The first intermetatarsal space sometimes contained a large artery arising directly from the dorsalis pedis or first proximal perforating a. as well as the first dorsal and first plantar metatarsal arteries. In this space, arterial patterns were classified into 4 types and 9 subtypes based on the origins and proximal courses of these arteries. The so-called standard pattern was found in only 19% of the feet, while an arterial pattern with a common proximal trunk on the plantar side for the first dorsal and first plantar metatarsal aa. was found most frequently (46%). In the second intermetatarsal space the second dorsal metatarsal a. was usually located on the dorsum.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 206 (1980), S. 403-415 
    ISSN: 1432-0878
    Keywords: C cell complex ; Dog fetus ; C-thyroglobulin ; Calcitonin ; Immunoperoxidase reaction
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The development of C-cell complexes was investigated in dog fetuses by an immunoperoxidase method with three specific antisera: anti-calcitonin, anti-C-thyroglobulin (C-Tg), and anti-19S thyroglobulin. Ultimobranchial bodies joined with the thyroid anlage and then dispersed into the parenchyma to form large C cell groups. Sparse reaction products of C-Tg initially appeared in C cells with small amounts of cytoplasm. Later at about day 39 of gestation, when the immunoreactivity of calcitonin and 19S thyroglobulin appeared weakly in C cells and follicular cells, C-cell complexes were identified as large cell masses containing numerous undifferentiated cells without no immunoreactivity for any of the antisera. As development proceeded, the undifferentiated cells developed progressively the morphology of C cells. In addition, the undifferentiated cells developed 19S thyroglobulin immunoreactivity, that is, within some of the complexes small clusters of cells filled with material immunoreactive for 19S thyroglobulin. They were not organized into follicles during the fetal period, and were very slow in development. Depending on the degree of development of the undifferentiated cells, several features of the complexes were noted. The present study indicates that not only C cells but also follicular thyroid cells appear to be derived from the ultimobranchial bodies.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-0878
    Keywords: C-cell complex ; Postnatal dog ; C-thyroglobulin ; Calcitonin ; 19S thyroglobulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Continued from the previous study in fetal animals (Kameda et al. 1980), the development and maturation of C-cell complexes in postnatal dogs from newborn to adult were investigated by use of an immunoperoxidase method using antisera to calcitonin, C-thyroglobulin (C-Tg) and 19S thyroglobulin, respectively. The younger the animals were, the more numerous were undifferentiated cells and high columnar epithelial cells in the complexes. With increasing age, the constituent elements of the complexes progressively differentiated. In one type of complex there are a large number of C-cells in various developmental stages, as well as undifferentiated cells and cysts. C-cell complexes composed mostly of mature C-cells were regarded as the more highly differentiated structures of this type. A second type contains follicular cells in various stages of differentiation in addition to undifferentiated cells and C-cells, i.e., 19S-positive cell masses not yet organized into follicles, primordial follicles with small lacunae and comparatively larger follicles. The follicular cells in the complexes were similar with respect to immunoreaction and folliculogenesis to the cells of fetal thyroids, but they developed very slowly. In conclusion, the present study indicates that follicular thyroid cells can differentiate within C-cell complexes, i.e., they develop from cells of ultimobranchial body origin.
    Type of Medium: Electronic Resource
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