Neurology
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Randomized Controlled Trial Clinical Trial
Experimental brush-evoked allodynia activates posterior parietal cortex.
To study the brain activation pattern of coexisting experimental ongoing pain and brush-evoked allodynia (pain evoked by innocuous brush) with the use of PET. ⋯ The specific activation of contralateral BA 5/7 indicates that this brain region is important to the processing of brush-evoked allodynia. The involvement of BA 5/7 in brush-evoked allodynia is claimed to reflect multisensory input to this region, its role in conscious pain perception, and its neuroplastic properties.
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Cerebral cavernous malformation (CCM) is one of the most common vascular malformations of the CNS. Familial CCM are increasingly diagnosed, but little is known about their natural history, especially in asymptomatic patients. ⋯ This prospective study confirms the dynamic nature of CCM. The appearance of new lesions in 30% of patients has to be retained as a hallmark of the familial condition.
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To quantify the effects of deep brain stimulation (DBS) of globus pallidus interna (GPi) and subthalamic nucleus (STN) on motor fluctuations and dyskinesia in PD and to determine how the response to levodopa was modified by DBS. ⋯ DBS objectively reduces motor fluctuations. This is achieved by reduction of drug-off disability and not by alterations in levodopa pharmacodynamics. This finding suggests alleviation of interdose trough disability as an alternative strategy to prolonging the effects of each dose of levodopa as a means to reduce motor fluctuations.
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Clinical Trial
Localizing value of alpha-methyl-L-tryptophan PET in intractable epilepsy of neocortical origin.
[(11)C] alpha-methyl-L-tryptophan (alpha-MTrp) has been developed as a tracer for the study of the synthesis of serotonin in the brain with PET. However, it has been shown that in pathologic conditions the tracer may reflect the activation of kynurenine metabolism. Increased levels of serotonin and quinolinic acid have been described in resected epileptogenic cortex, raising the possibility that alpha-MTrp can localize seizure foci in patients with intractable partial epilepsy. The authors assessed the uptake of alpha-MTrp in 18 patients (11 men, mean +/- SD age 27.1 +/- 10.1 years, range 13 to 54) with intractable partial epilepsy to correlate the PET findings with the epileptogenic area defined by electroclinical and neuroimaging data. ⋯ alpha-MTrp-PET may be of value in the localization of the epileptogenic area not only in patients with visible dysplastic lesions, but also in those with cryptogenic partial epilepsy.
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Randomized Controlled Trial Clinical Trial
Cerebral hemorrhage after intra-arterial thrombolysis for ischemic stroke: the PROACT II trial.
To analyze the frequency, clinical characteristics, and predictors of symptomatic intracerebral hemorrhage (ICH) after intraarterial (IA) thrombolysis with recombinant pro-urokinase (r-proUK) in acute ischemic stroke. ⋯ Symptomatic ICH after IA thrombolysis with r-proUK for acute ischemic stroke occurs early after treatment and has high mortality. The risk of symptomatic ICH may be increased in patients with a blood glucose >200 mg/dL at stroke onset.