نتایج جستجو برای: blood plexus
تعداد نتایج: 697664 فیلتر نتایج به سال:
In vertebrate and invertebrate brains, nitric oxide (NO) synthase (NOS) is frequently expressed in extensive meshworks (plexuses) of exceedingly fine fibers. In this paper, we investigate the functional implications of this morphology by modeling NO diffusion in fiber systems of varying fineness and dispersal. Because size severely limits the signaling ability of an NO-producing fiber, the pred...
During embryonic development and adult life, brain cavities and ventricles are filled with cerebrospinal fluid (CSF). CSF has attracted interest as an active signaling medium that regulates brain development, homeostasis and disease. CSF is a complex protein-rich fluid containing growth factors and signaling molecules that regulate multiple cell functions in the central nervous system (CNS). Th...
Schizophrenia is recognized as a psychiatric disorder that causes the most pronounced disturbances of cognition and social integration. In the etiopathogenesis of the disease, genetic, neurobiological and vascular factors are involved. Functional integrity of the brain can be correlated with the integrity of the blood-brain barrier (BBB), and the dysfunction of this barrier is an indicator that...
Since the classical experiments of D a ndy and Blackfan (5) it has been generally recognized that the chorioid plexuses are the principal sources of cerebrospinal fluid. Controversy still exists, however, concerning the method of production of the fluid. I t has been held by some authorities tha t the cerebrospinal fluid is actively secreted by the epithelial cells of the plexuses and by others...
One of the notable features of Alzheimer's disease (AD) is the overabundance of beta-amyloid peptides in brain fluids, leading to the formation and deposition of insoluble amyloid plaques. Previous work in this lab demonstrates that the normal choroid plexus, a primary component of the blood-cerebrospinal fluid barrier, has the capacity to remove beta-amyloid from the cerebrospinal fluid, poten...
The purpose of this study was to evaluate the therapeutic result of CT -guided celiac plexus block for managing intractable upper abdominal pain due to pancreatic carcinoma or chronic pancreatitis. We treated 22 cancer patients who were on regular narcotic medication. After an IV infusion of 10mLlkg Ringer's lactate solution, all patients were rolled onto prone position, and lidocaine was ...
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BACKGROUND Brain lipoprotein metabolism is dependent on lipoprotein particles that resemble plasma high-density lipoproteins but that contain apolipoprotein (apo) E rather than apoA-I as their primary protein component. Astrocytes and microglia secrete apoE but not apoA-I; however, apoA-I is detectable in both cerebrospinal fluid and brain tissue lysates. The route by which plasma apoA-I enters...
Background: Nowadays, fracture surgery represents a big part of the orthopedic surgeon workload, and usually has associated major clinical and social cost implications. We report a patient case of hip fracture with acute pulmonary edema treated with inguinal lumbar plexus block for analgesia and spinal anesthesia with low dose of isobaric bupivacaine for surgery. Case Report: A 85-year-old fema...
Chemical homeostasis in the extracellular fluid of the central nervous system (CNS) is maintained by two brain barrier systems, i.e., the blood-brain barrier (BBB) that separates the blood circulation from brain interstitial fluid and the blood-cerebrospinal fluid barrier (BCB) that separates the blood from the cerebrospinal fluid (CSF). The choroid plexus, where the BCB is located, is a polari...
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