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Author: Michael Köhncke
Publisher: Springer Science & Business Media
ISBN: 3642704042
Category : Medical
Languages : en
Pages : 94
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Book Description
Comparative anatomy of the vertebrate head was taken a great step forward about a hundred years ago when the Born method of reconstruction - using wax plates - was applied to examination of chondrocrania. Thus, a highly detailed and very exact description became possible. Enthusiastically taken up by many, Gaupp with his work on Lacerta (1900) was the first to apply it. Regrettably, efforts were not concentrated on a few, clear systematic groups, but were spread rather widely over forms ranging from easily available domestic species, e.g. Oryctolagus (Voit 1909) to rare exotic species such as Tachyglossus (Gaupp 1908) and Ornithorhynchus (Wilson 1901). Furthermore, the research remained relatively static in its considerations, and until very recently a chon drocranium was treated as complete in its development in the same way that a fully developed skull is complete and in its form specific for a species or genus. The stadium optimum had to be abandoned as an idealized fiction giving way to the concept of a dynamically progressing ontogeny.
Author: Michael Köhncke
Publisher: Springer Science & Business Media
ISBN: 3642704042
Category : Medical
Languages : en
Pages : 94
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Book Description
Comparative anatomy of the vertebrate head was taken a great step forward about a hundred years ago when the Born method of reconstruction - using wax plates - was applied to examination of chondrocrania. Thus, a highly detailed and very exact description became possible. Enthusiastically taken up by many, Gaupp with his work on Lacerta (1900) was the first to apply it. Regrettably, efforts were not concentrated on a few, clear systematic groups, but were spread rather widely over forms ranging from easily available domestic species, e.g. Oryctolagus (Voit 1909) to rare exotic species such as Tachyglossus (Gaupp 1908) and Ornithorhynchus (Wilson 1901). Furthermore, the research remained relatively static in its considerations, and until very recently a chon drocranium was treated as complete in its development in the same way that a fully developed skull is complete and in its form specific for a species or genus. The stadium optimum had to be abandoned as an idealized fiction giving way to the concept of a dynamically progressing ontogeny.
Author: Michael Kohncke
Publisher:
ISBN: 9783642704055
Category :
Languages : en
Pages : 100
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Book Description
Author: Milan Klima
Publisher: Springer Science & Business Media
ISBN: 3642586120
Category : Science
Languages : en
Pages : 150
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Book Description
Morphogeny of the nasal skull was investigated in 92 embryos of 13 species of Cetacea. Compared to the original nasal capsule of land mammals, the nasal structures of Cetacea show many weighty transformations. As a result, the nostrils are translocated from the tip of the snout to the vertex of the head. Several structures of the embryonic nasal skull remain preserved even in adult cetaceans. The translocation of the nostrils to the highest point of the surfacing body is among the most perfect adaptations of cetaceans to the aquatic life habits. The morphogeny of the nasal skull suggests that all cetaceans are of common origin and form a single monophyletic order. The hitherto usual division of this order into two suborders, Mysticeti and Odontoceti, appears to be unsubstantiated. Rather, at least three closely related superfamilies should be distinguished within the order Cetacea, viz., Balaenopteroidea, Physeteroidea, and Delphinoidea. The results are in a
Author: D. Kent Morest
Publisher: Springer Science & Business Media
ISBN: 3642706525
Category : Medical
Languages : en
Pages : 112
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Book Description
6 Acknowledgments 87 7 References 88 Subject Index 95 VIII Abbreviations A cerebral aqueduct anterior deep dorsal nucleus, CGM AD AP anterior pretectal nucleus AR auditory radiation ASD anterior superficial dorsal nucleus, CGM BA brachium, accessory (medial) nucleus, IC BIC brachium of inferior colliculus BSC brachium of superior colliculus cerebellum CB CC caudal cortex, IC CF cuneate fasciculus CG central gray CGL lateral geniculate body medial geniculate body CGM commissure of inferior colliculus CIC CIN central intralaminar nucleus CL lateral part of commissural nucleus, IC CM central medial nucleus CN central nucleus, IC CORD spinal cord CP cerebral peduncle CSC commissure, SC CUN cuneiform area, IC D dorsal nucleus, CGM DA anterior dorsal nucleus, CGM DC dorsal cortex, IC DD deep dorsal nucleus, CGM DI dorsal intercollicular area DM dorsomedial nucleus, IC DMCP decussation of superior cerebellar peduncle DS superficial dorsal nucleus, CGM EYE enucleation FX fornix GN gracile nucleus HIT habenulo-interpeduncular tract inferior colliculus IC III oculomotor nerve IN interpeduncular nucleus L posterior limitans nucleus LC laterocaudal nucleus, IC LI lateral intercollicular area LL lateral lemniscus lateral mesencephalic nucleus LMN LN lateral nucleus, IC LP lateral posterior nucleus LPc caudal part of lateral posterior nucleus LV pars lateralis, ventral nucleus, CGM M medial division, CGM MB mammillary bodies middle cerebellar peduncle MCP MES V mesencephalic nucleus of trigeminal tract MI medial intercollicular area ML medial lemniscus MLF medial longitudinal fasciculus MT mammillothalamic tract MZ marginal zone, CGM OC oculomotor nuclei occipital cortex lesion OCC OT optic tract.
Author: Wolfram F. Neiss
Publisher: Springer Science & Business Media
ISBN: 3642713475
Category : Medical
Languages : en
Pages : 97
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Book Description
This investigation is concerned with the ultracytochemistry of glycoconjugates - i. e., the carbohydrate moieties of glycoproteins and glycolipids - attached to intracellular post-Golgi membranes (membranes of lysosomes, peroxisomes, secretory granules of exocrine and endocrine gland cells). In addition mitochon dria have been studied. There are at present very few cytochemical studies, none of them systematic, on intracellular membrane-bound glycoconjugates. So far it has only been re ported that phosphotungstic acid (PTA) at low pH (pH
Author: Margit Pavelka
Publisher: Springer Science & Business Media
ISBN: 364272826X
Category : Medical
Languages : en
Pages : 104
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Book Description
This book gives a survey of the architecture of the Golgi apparatus, as revealed by morphological and cytochemical studies with a variety of cell types. The results presented include demonstrations of Golgi architecture in the course of cell differentiation, at varying functional cellular states, and under the influence of microtubule-disrupting agents. Emphasis is particularly placed on the organization of subsections of the Golgi apparatus and the questions of how Golgi subsections may be related to functional subcompartments of the Golgi system. By means of affinity-cytochemical approaches, using a palette of lectins of diverse sugar specificities, it is shown that functional subcompartments can be distributed in the complex Golgi system irrespective of the morphological subdivision in cis-medial-trans-transmost subsections. The use of pre- and post-embedment lectin-cytochemical approaches as a tool for the localization of functional Golgi subcompartments is of particular interest, especially as some of the lectins have been used in these approaches for the first time. This book intends to provide synoptic information on the architecture of the Golgi apparatus, its wide variability and possible arrangements of Golgi subcompartments.
Author:
Publisher:
ISBN:
Category : Zoology
Languages : en
Pages : 420
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Author:
Publisher:
ISBN:
Category : Medicine
Languages : en
Pages : 1218
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Author: Heinz Splechtna
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 688
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Book Description
Author: David A. N. Hoyte
Publisher: Paul Parey Zeitschriftenverlag GmbH & Company KG
ISBN:
Category : Science
Languages : en
Pages : 150
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Book Description
