Results 261 to 270 of about 53,521 (302)
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Sympathetic innervation of the ciliary muscle in monkeys
Experimental Eye Research, 1972Abstract Nerve terminals containing small granular vesicles were observed by electron microscopy in all regions of ciliary muscles of cynomolgous and rhesus monkeys. An average of 1% of terminals contained vesicles of this type which are known to be sympathetic.
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Sympathetic Innervation of the Normal Human Thyroid
The Journal of Clinical Endocrinology & Metabolism, 1974ABSTRACT The sympathetic innervation of the normal human thyroid was investigated by a combination of fluorescence histochemistry and electron microscopic autoradiography. Sympathetic, adrenergic nerve fibers were numerous in the human thyroid, and they were mainly found in two locations: in relation to vessels, and in interfollicular spaces.
A, Melander +7 more
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VEGF promotes vascular sympathetic innervation
American Journal of Physiology-Heart and Circulatory Physiology, 2008The sympathetic nervous system, via postganglionic innervation of blood vessels and the heart, is an important determinant of cardiovascular function. The mechanisms underlying sympathetic innervation of targets are not fully understood. This study tests the hypothesis that target-derived vascular endothelial growth factor (VEGF) promotes sympathetic ...
Stephen B, Marko, Deborah H, Damon
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The Sympathetic Vasomotor Innervation of the Skin of the Dog
Acta Physiologica Scandinavica, 1949Summary.No evidence was found for the existence of a sympathetic vasodilator innervation to the skin of the hind limbs or the ear of the dog.Nor‐adrenaline has a pronounced vasoconstrictor action on cutaneous vessels. The observation agrees with the idea that the substance might be the transmitter at vasoconstrictor nerve endings.Adrenaline has a pure ...
BJÖRN FOLKOW +3 more
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Sympathetic innervation of fetal mouse thymus
European Journal of Immunology, 1984AbstractThis study was carried out to investigate the presence of sympathetic nerve fibers in the developing thymus. Thymic rudiments from 13 days of gestation up to birth and adult thymuses were examined by histofluorescence microscopy to detect the presence of these nerve fibers during ontogeny.
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Sympathetic innervation of the eustachian tube in rats
European Archives of Oto-Rhino-Laryngology, 1994The glyoxylic catecholaminergic histofluorescence method was employed on the mucosa of the rat's eustachian tube (ET) in order to study the sympathetic innervation present. One percent neutral red was used as counterstain. Many noradrenergic fibers were demonstrable around blood vessels, glands and submucosa of the ET, but not in the epithelium.
H W, Wang, J K, Lin, J Y, Wang
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Imaging sympathetic innervation.
The quarterly journal of nuclear medicine : official publication of the Italian Association of Nuclear Medicine (AIMN) [and] the International Association of Radiopharmacology (IAR), 1999The autonomic innervation of the heart modifies most cardiac functions. Especially the heart rate and the force of contraction of myocytes are modulated by the autonomic nervous system. A number of specific neurotransmitters interact with receptors on post- and presynaptic binding sites regulating the complex electromechanical system of the heart ...
P, Matheja +4 more
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Fibroblasts and Sympathetic Innervation of Blood Vessels
Journal of Vascular Research, 1985The distances between fibroblasts and adrenergic varicosities were measured in four distinct blood vessels of the dog, concomitantly with the measurement of corresponding distances between smooth muscle cells and adrenergic varicosities. The results showed a closer anatomical relationship between fibroblasts and adrenergic varicosities as compared to ...
P, Soares-da-Silva, I, Azevedo
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Visceral Nerves: Vagal and Sympathetic Innervation
Journal of Parenteral and Enteral Nutrition, 2008The autonomic nervous system is the primary neural mediator of physiological responses to internal and external stimuli. It is composed of 2 branches: the sympathetic nervous system, which mediates catabolic responses, and the parasympathetic nervous system, composed of the vagus nerve, which regulates anabolic responses.
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Regulation of hematopoietic niches by sympathetic innervation
BioEssays, 2006AbstractOnce hematopoiesis is established in the bone marrow, a continuous egress of hematopoietic stem cells (HSCs) to the periphery occurs at a low frequency. It has been proposed that this phenomenon is part of a regenerative homeostatic mechanism that ensures the maintenance of hematopoiesis through the life of the individual. The administration of
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