Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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Comparative Study
Sympathetic facilitation of hyperalgesia evoked from myofascial tender and trigger points in patients with unilateral shoulder pain.
To provide evidence for the sympathetic-sensory interaction within a trigger point, which may contribute to local and referred pain and sympathetic symptoms in myofascial pain syndrome. ⋯ Sympathetic hyperactivity needs to be considered during the clinical evaluation and management of myofascial pain syndrome.
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Historical Article
Axonal excitability properties in amyotrophic lateral sclerosis.
To investigate axolemmal ion channel function in patients diagnosed with sporadic amyotrophic lateral sclerosis (ALS). ⋯ An increase in persistent Na+ conductances coupled with reduction in K+ currents would predispose axons of ALS patients to generation of fasciculations and cramps. Axonal excitability studies may provide insight into mechanisms responsible for motor neuron loss in ALS.
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Clinical Trial
Automated single-trial measurement of amplitude and latency of laser-evoked potentials (LEPs) using multiple linear regression.
Laser stimulation of Adelta-fibre nociceptors in the skin evokes nociceptive-specific brain responses (laser-evoked potentials, LEPs). The largest vertex complex (N2-P2) is widely used to assess nociceptive pathways in physiological and clinical studies. The aim of this study was to develop an automated method to measure amplitudes and latencies of the N2 and P2 peaks on a single-trial basis. ⋯ This method is particularly desirable in several experimental conditions (e.g. drug studies, correlations with experimental variables, simultaneous EEG/fMRI and low signal-to-noise ratio data) and in clinical practice. The described multiple linear regression approach can be easily implemented for measuring evoked potentials in other sensory modalities.
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Comparative Study Clinical Trial
A comparison of subdermal wire electrodes with collodion-applied disk electrodes in long-term EEG recordings in ICU.
To compare long-term electroencephalographic (EEG) recordings of standard collodion-applied scalp disk electrodes (SDEs) with newly developed subdermal wire electrodes (SWEs) in comatose intensive care unit (ICU) patients. ⋯ This is the first controlled study that demonstrates the superiority of SWEs compared to SDEs in an ICU population.
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Comparative Study Clinical Trial
Deep brain stimulation of the subthalamic nucleus affects resting EEG and visual evoked potentials in Parkinson's disease.
We studied changes of the EEG spectral power induced by deep brain stimulation (DBS) of the subthalamic nucleus (STN) in patients with Parkinson's disease (PD). Also analyzed were changes of visual evoked potentials (VEP) with DBS on and off. ⋯ Changes in idling EEG activity observed diffusely over scalp together with involvement of the VEP suggest that the effects of DBS STN reach far beyond the motor system influencing the basic mechanisms of rhythmic cortical oscillations.