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61.
Temporomandibular joint arthrography has been helpful in selecting patients for reconstructive surgery who have severe temporomandibular joint dysfunction. Structural abnormalities of the soft tissues can be demonstrated where only minimal osseous changes are seen on tomography. The normal arthrographic anatomy of the joint is reviewed and normal and pathological joints are illustrated. 相似文献
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The pathogenesis of peripheral aneurysms of the central nervous system: a subject review from the AFIP 总被引:1,自引:0,他引:1
Most central nervous system aneurysms occur around the circle of Willis, and are congenital or arteriosclerotic in origin when in that location. Peripherally located aneurysms are either idiopathic or secondary to infection, tumor embolus (from choriocarcinoma and cardiac myxoma), Moyamoya disease, or trauma. The pathophysiologic features of these aneurysms are discussed. 相似文献
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Changes in the extracellular concentration of 5-HT evoked by electrical stimulation of brain slices containing either dorsal raphe nucleus (DRN) or suprachiasmatic nucleus (SCN) from rats treated for 21 days with fluoxetine (5 mg/kg; i.p.) or water were monitored using fast cyclic voltammetry (FCV). Stimulated 5-HT overflow was enhanced significantly in both brain regions after 21 days treatment with fluoxetine but there was no change in the half time for re-uptake (t1/2). Concentration response curves for inhibition of electrically stimulated 5-HT overflow by 8-OH-DPAT (5-HT1a receptor agonist) or RU24969 (5-HT1b receptor agonist) in the DRN or SCN respectively were obtained in slices prepared from both groups of animals. There was a significant shift to the right in the dose-response curve for RU24969 in the SCN in fluoxetine treated animals but a shift to the left for the dose-response curve for 8-OH-DPAT in the DRN. These data suggest that down regulation of the 5-HT1b autoreceptors occurs in an axon terminal region (SCN) but that there is a sensitisation of 5-HT1a autoreceptor mechanisms controlling 5-HT overflow in the DRN. 相似文献
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We present the case of a 19-year-old individual presenting to an orthopaedic outpatient clinic several months following a dashboard knee injury during a road traffic accident with intermittent mechanical symptoms. Despite unremarkable examination findings and normal magnetic resonance imaging, the patient was identified subsequently as having an intra-articular plastic foreign body consistent with a piece of dashboard on arthroscopic knee assessment, the retrieval of which resulted in a complete resolution of symptoms. 相似文献