Medial Axis
Mostrando 25-36 de 37 artigos, teses e dissertações.
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25. The human vertebral column at the end of the embryonic period proper. 2. The occipitocervical region.
The present investigation of the cervical region of the vertebral column at eight post-ovulatory weeks is the first such study based on precise reconstructions of staged embryos. At the end of the embryonic period proper, a typical vertebra is a U-shaped piece of cartilage characterized by spina bifida occulta. The notochord ascends through the centra and le
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26. Some determinants of optic terminal localization and retinotopic polarity within fibre populations in the tectum of goldfish.
1. The reorganization of the retinotectal projection which results after partial ablation of tectal tissue was examined in goldfish using electrophysiological methods. 2. Regardless of the size of a unilateral ablation of caudal tectum, an orderly and virtually complete, 'compressed', visual projection re-formed on the remaining tectum after crushing the opt
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27. The functional significance of the position of the centre of rotation for jaw opening and closing in the rabbit.
In the rabbit, jaw opening and closing occurs in combination with condylar protrusion and retraction. Consequently the centre of rotation (CR) for the movement lies in the inferior portion of the ascending ramus of the mandible, far below the condyle. This location is stable and independent of the type of food being chewed and the age of the animal. The topo
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28. Caenorhabditis elegans embryonic axial patterning requires two recently discovered posterior-group Hox genes
Hox genes encode highly conserved transcription factors that control regional identities of cells and tissues along the developing anterior–posterior axis, probably in all bilaterian metazoans. However, in invertebrate embryos other than Drosophila, Hox gene functions remain largely unknown except by inference from sequence similarities and expression patt
The National Academy of Sciences.
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29. Disruption of Astral Microtubule Contact with the Cell Cortex Activates a Bub1, Bub3, and Mad3-dependent Checkpoint in Fission YeastD⃞V⃞
In animal and yeast cells, the mitotic spindle is aligned perpendicularly to the axis of cell division. This ensures that sister chromatids are separated to opposite sides of the cytokinetic actomyosin ring. In fission yeast, spindle rotation is dependent upon the interaction of astral microtubules with the cortical actin cytoskeleton. In this article, we sh
The American Society for Cell Biology.
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30. Localization of the phrenic nucleus in the spinal cord of the rabbit.
The motor fibres of the phrenic nerve arise in the cervical portion of the spinal cord from a group of lower motor neuron cell bodies called the 'phrenic nucleus'. The phrenic nucleus of the rabbit has been located by cutting the right phrenic nerve (phrenicotomy) in the neck and observing retrograde degeneration (chromatolysis) in the cells of the ventral g
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31. Genetic control of number of midbrain dopaminergic neurons in inbred strains of mice: relationship to size and neuronal density of the striatum.
The activity of tyrosine hydroxylase [TyrHase; tyrosine-3-monooxygenase; L-tyrosine, tetrahydropteridine: oxygen oxidoreductase (3-hydroxylating), EC 1.14.16.2] is 20% less in whole midbrain of CBA/J mice than BALB/cJ mice and is paralleled by a comparable difference in the number of dopaminergic neurons in which the enzyme can be detected immunocytochemical
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32. Modulation of development, growth dynamics, wall crystallinity, and infection sites in white clover root hairs by membrane chitolipooligosaccharides from Rhizobium leguminosarum biovar trifolii.
We used bright-field, time-lapse video, cross-polarized, phase-contrast, and fluorescence microscopies to examine the influence of isolated chitolipooligosaccharides (CLOSs) from wild-type Rhizobium leguminosarum bv. trifolii on development of white clover root hairs, and the role of these bioactive glycolipids in primary host infection. CLOS action caused a
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33. Varus Gonarthrosis Predisposes to Varus Malalignment in TKA
Postoperative alignment is a predictor for long-term survival of total knee arthroplasty (TKA). The purpose of this study was to evaluate whether or not preoperative deformities predispose to intraoperative malposition of TKA components. A retrospective radiographic analysis of 53 primary TKA cases was performed. Preoperative AP hip to ankle and lateral knee
Springer-Verlag.
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34. Noradrenergic and serotonergic modulation of a hyperpolarization-activated cation current in thalamic relay neurones.
1. Modulation of the hyperpolarization-activated cation current, Ih, by noradrenaline (NA) and serotonin (5-HT) was examined in guinea-pig and cat medial and lateral geniculate relay neurones using the in vitro slice technique. 2. In the absence of pharmacological antagonists, local application of NA resulted in a slow depolarization and decrease in apparent
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35. Src-dependent STAT-3-mediated Expression of Monocyte Chemoattractant Protein-1 Is Required for 15(S)-Hydroxyeicosatetraenoic Acid-induced Vascular Smooth Muscle Cell Migration*
To understand the role of human 15-lipoxygenase 1 (15-LOX1) in vascular wall remodeling, we have studied the effect of the major 15-LOX1 metabolite of arachidonic acid, 15(S)-hydroxyeicosatetraenoic acid (15(S)-HETE), on vascular smooth muscle cell (VSMC) migration both in vitro and in vivo. Among 5(S)-HETE, 12(S)-HETE, and 15(S)-HETE, 15(S)-HETE potentially
American Society for Biochemistry and Molecular Biology.
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36. Pulmonary vascular structure and function in chronic obstructive pulmonary disease.
Cardiac catheterization data from eight patients with severe chronic obstructive lung disease and pulmonary hypertension at rest (greater than 25 mm Hg) were compared with those obtained from 14 patients with mild to moderate disease whose pulmonary artery pressure was within the normal range at rest (mean 15 (SEM 1) mm Hg), but increased with exercise (30 (