本文报道1例35岁的男性患者,其单侧小脑损伤,导致同侧上、下肢在同步环形运动时明显的协调障碍,但损伤对侧肢体同步运动或者左右肢体成对运动时,患者并不表现出协调障碍。因此,小脑不仅是联动肢体协调运动的基础,同时也参与调节肢体间的协调运动。小脑偏侧共济失调患者环形运动时的肢体协调缺陷@Bracewell R.M.$Wolfson Ctr. Clin./Cogn. Neurosci., University of Wales, Brigantia Building, Penrallt Road, Bangor,Gwynedd, LL57 2AS, United Kingdom Dr.
@Balasubramaniam R.
@Wing A.M.
@姚庆和… 相似文献
目的:在光动力疗法(PD T)治疗老年性黄斑变性(A R M D)前和后,用光学相干断层扫描(O CT)监测脉络膜新生血管(CNV)的活性,并评价O CT在其中所起的作用。设计:前瞻性观察病例系列研究。机构:公共机构研究。患者:53例AR M D患者(62只眼)。观察方法:前瞻性的病例观察研究。主要观察指标:荧光素血管造影中有无荧光素渗漏、O CT显示的视网膜内或视网膜下渗液及O CT显示的黄斑以及脉络膜新生血管复合体的厚度。结果:PDT术后黄斑厚度明显下降(P=0.001)。然而,CN V厚度在PD T术后无明显变化(P=0.567)。治疗前,一旦AR M D被确诊,O C… 相似文献
Background: Both pain and the pharmacologic management of pain can cause the undesirable effect of sleep disruption. One goal of basic and clinical neuroscience is to facilitate rational drug development by identifying the brain regions and neurochemical modulators of sleep and pain. Adenosine is thought to be an endogenous sleep promoting substance and adenosinergic compounds can contribute to pain management. In the pontine brain stem adenosine promotes sleep but the effects of pontine adenosine on pain have not been studied. This study tested the hypothesis that an adenosine agonist would cause antinociception when microinjected into pontine reticular formation regions that regulate sleep.
Methods: The tail flick latency (TFL) test quantified the time in seconds for an animal to move its tail away from a thermal stimulus created by a beam of light. TFL measures were used to evaluate the antinociceptive effects of the adenosine A1 receptor agonist N6-p-sulfophenyladenosine (SPA). Pontine microinjection of SPA (0.1 [mu]g/0.25 [mu]l, 0.88 mm) was followed by TFL measures as a function of time after drug delivery and across the sleep-wake cycle.
Results: Compared with saline (control), pontine administration of the adenosine agonist significantly increased latency to tail withdrawal (P < 0.0001). The increase in antinociceptive behavior evoked by the adenosine agonist SPA was blocked by pretreatment with the adenosine A1 receptor antagonist 8-cyclopentyl-1, 3-dipropylxanthine (DPCPX, 0.75 ng/0.25 [mu]l, 10 [mu]m). 相似文献
Background: Reports of major and minor sequelae following lidocaine spinal anesthesia have generated interest in an alternative short-acting intrathecal agent. Of the available anesthetics suitable for short-duration spinal anesthesia, prilocaine is perhaps the most promising agent. However, data comparing the neurotoxicity of these agents are lacking. Accordingly, the present experiments investigate whether prilocaine and lidocaine differ with respect to sensory impairment and histologic damage when administered intrathecally in the rat.
Methods: Ninety rats were divided into three groups to receive an intrathecal infusion of 2.5% prilocaine in saline, 2.5% lidocaine in saline, or normal saline. The animals were assessed for persistent sensory impairment 4 days after anesthetic administration using the tail-flick test. Three days later, the animals were killed, and specimens of the spinal cord and nerve roots were obtained for histopathologic examination.
Results: Prilocaine and lidocaine produced equivalent elevations in tail-flick latency that differed significantly from saline. Histologic injury scores with prilocaine were greater than with lidocaine, but this difference did not reach statistical significance. 相似文献
