Beschreibung
An ontogenetic study of the central nervous system is an important tool for the under standing of its morphological and morpho-functional relations. Numerous qualitative results on the ontogenesis of the visual system can be found in the literature, but there are only very few quantitative results fulfilling the following parameters: (1) samples of sufficient size; (2) measurements considering results of stereology; (3) evaluation and interpretation performed with sound biomathematical methods; (4) quantitative of the shrinkage caused by the histological technic. The first three results independent demands can be fulfilled by using available computerized stereological and biomathe matical methods (Kretschmann and Wingert, 1968, 1969a, b, c, 1971; Wingert, 1969; Zilies and Wingert, 1972; Zilies et al., 1976a, c, d). The interdisciplinary cooperation between morphologists and mathematicians makes possible the analysis of the volume growth, the number of nerve-and glial cells in a whole brain region (Schleicher et al., 1975a, b; Zilies and Wingert, 1973a, b; Zilies et al., 1974, 1975a, b), the semi-automatic analysis of the nucleolar diameters in nerve cells (Zilies et al., 1976b) and computer aided compartment analysis with the point counting method (Zilies et al., in press b). Tupaia belangeri, an interesting animal for neurobiologists, was the experimental animal of choice because it combines the advan tages of a small brain (conducive to rapid processing) with many characteristics of the of the primate brain.
Autorenporträt
InhaltsangabeMaterial and Methods.- 1. Preparation and Neurohistology.- 2. Measurements.- 2.1. Fresh Volume of the Whole Brain and Shrinkage.- 2.2. Volume of the Whole Brain After Sectioning.- 2.3. Cell Counting.- 2.4. Nucleolar Diameter.- 2.5. Compartment Analysis.- 3. Biomathematical Analysis.- Results.- 1. Qualitative Analysis.- 1.1. Area Striata.- 1.1.1. Delineation During Ontogenesis.- 1.1.2. Cytoarchitectonic and Cytology.- 1.1.2.1. Adult Stage.- 1.1.2.2. Between Neonatal and Adult Stages.- 1.1.3. Myeloarchitectonic.- 1.1.4. Fibrilloarchitectonic.- 1.2. Corpus Geniculatum Laterale Nucleus Dorsalis.- 1.2.1. Delineation During Ontogenesis.- 1.2.2. Cytoarchitectonic and Cytology.- 1.2.2.1. Adult Stage.- 1.2.2.2. Embryonal Stages.- 1.2.2.3. Neonatal Stage.- 1.2.2.4. Between Neonatal and Adult Stages.- 1.2.3. Myeloarchitectonic.- 1.2.4. Fibrilloarchitectonic.- 1.3. Corpus Geniculatum Laterale Nucleus Ventralis.- 1.3.1. Delineation During Ontogenesis.- 1.3.2. Cytology.- 1.3.2.1. Adult Stage.- 1.3.2.2. Embryonal Stages.- 1.3.2.3. Neonatal Stage.- 1.3.2.4. Between Neonatal and Adult Stages.- 1.3.3. Myeloarchitectonic.- 1.3.4. Fibrilloarchitectonic.- 1.4. Pulvinar.- 1.4.1. Delineation During Ontogenesis.- 1.4.2. Cytology.- 1.4.2.1. Adult Stage.- 1.4.2.2. Embryonal Stages.- 1.4.2.3. Neonatal Stage.- 1.4.2.4. Between Neonatal and Adult Stages.- 1.4.3. Myeloarchitectonic.- 1.4.4. Fibrilloarchitectonic.- 1.5. Nucleus Posterior Thalami.- 1.5.1. Delineation During Ontogenesis.- 1.5.2. Cytology.- 1.5.2.1. Adult Stage.- 1.5.2.2. Embryonal Stage.- 1.5.2.3. Neonatal Stage.- 1.5.2.4. Between Neonatal and Adult Stages.- 1.5.3. Myeloarchitectonic.- 1.5.4. Fibrilloarchitectonic.- 1.6. Area Pretectalis.- 1.6.1. Delineation During Ontogenesis.- 1.6.2. Cytology.- 1.6.2.1. Adult Stage.- 1.6.2.2. Embryonal Stages.- 1.6.2.3. Neonatal Stage.- 1.6.2.4. Between Neonatal and Adult Stages.- 1.6.3. Myeloarchitectonic.- 1.6.4. Fibrilloarchitectonic.- 1.7. Nucleus Tractus Peduncularis Transversi.- 1.7.1. Delineation During Ontogenesis.- 1.7.2. Cytology.- 1.7.2.1. Adult Stage.- 1.7.2.2. Embryonal Stages.- 1.7.2.3. Neonatal Stages.- 1.7.2.4. Between Neonatal and Adult Stages.- 1.7.3. Myeloarchitectonic.- 1.7.4. Fibrilloarchitectonic.- 1.8. Colliculus Superior.- 1.8.1. Delineation During Ontogenesis.- 1.8.2. Cytoarchitectonic and Cytology.- 1.8.2.1. Adult Stage.- 1.8.2.2. Embryonal Stages.- 1.8.2.3. Neonatal Stage.- 1.8.2.4. Between Neonatal and Adult Stages.- 1.8.3. Myeloarchitectonic.- 1.8.4. Fibrilloarchitectonic.- 1.9. Nucleus Nervi Oculomotorii.- 1.9.1. Delineation During Ontogenesis.- 1.9.2. Cytology.- 1.9.2.1. Adult Stage.- 1.9.2.2. Embryonal Stages.- 1.9.2.3. Neonatal Stage.- 1.9.2.4. Between Neonatal and Adult Stages.- 1.9.3. Myeloarchitectonic.- 1.9.4. Fibrilloarchitectonic.- 1.10. Nucleus Nervi Trochlearis.- 1.10.1. Delineation During Ontogenesis.- 1.10.2. Cytology.- 1.10.3. Myeloarchitectonic.- 1.10.4. Fibrilloarchitectonic.- 1.11. Nucleus Nervi Abducentis.- 1.11.1. Delineation During Ontogenesis.- 1.11.2. Cytology.- 1.11.2.1. Adult Stage.- 1.11.2.2. Between 36th Day of Ontogenesis and Adult Stage.- 1.11.3. Myeloarchitectonic.- 1.11.4. Fibrilloarchitectonic.- 2. Quantitative Results.- 2.1. Growth of Fresh Volumes of Visual Brain Regions.- 2.1.1. Area Striata.- 2.1.1.1. The Entire Area Striata.- 2.1.1.2. Individual Laminae of the Left Side of the Area Striata.- 2.1.2. Corpus Geniculatum Laterale Nucleus Dorsalis.- 2.1.3. Corpus Geniculatum Laterale Nucleus Ventralis.- 2.1.4. Pulvinar.- 2.1.5. Nucleus Posterior Thalami.- 2.1.6. Area Pretectalis.- 2.1.7. Nucleus Tractus Peduncularis Transversi.- 2.1.8. Colliculus Superior.- 2.1.9. Nucleus Nervi Oculomotorii.- 2.1.10. Nucleus Nervi Trochlearis.- 2.1.11. Nucleus Nervi Abducentis.- 2.2. Growth of the Number of Nerve- and Glial Cells in the Nucleus Nervi Oculomotorii and Nucleus Nervi Trochlearis.- 2.2.1. Nerve Cells in the Nucleus Nervi Oculomotorii.- 2.2.1.1. Number.- 2.2.1.2. Packing Density.- 2.2.2. Glial Cells in
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