Journal of clinical neurophysiology : official publication of the American Electroencephalographic Society
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J Clin Neurophysiol · Dec 2014
Case ReportsRecovery of TES-MEPs during surgical decompression of the spine: a case series of eight patients.
This study aimed to illustrate the recovery of transcranial electrical stimulation motor evoked potentials during surgical decompression of the spinal cord in patients with impaired motor function preoperatively. Specific attention was paid to the duration of neurologic symptoms before surgery and the postoperative clinical recovery. ⋯ In patients with a short onset of neurologic impairment because of compression of the spinal cord or caudal fibers, an intraoperative recovery of transcranial electrical stimulation motor evoked potentials can indicate an improvement of motor function postoperatively. Therefore, transcranial electrical stimulation motor evoked potentials can be considered as a useful tool to the surgeon to monitor the quality of decompression of the spinal cord.
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J Clin Neurophysiol · Dec 2014
Intraoperative monitoring for intracranial aneurysms: the Michigan experience.
Intraoperative neurophysiological monitoring is routinely used during the repair (endovascular or microsurgical) of intracranial aneurysms at major centers. There is a continued need of data sets from institutions with dedicated intraoperative neurophysiological monitoring services to further define the predictive factors of postoperative neurological deficits. We retrospectively reviewed and analyzed our database of all patients who underwent repair of intracranial aneurysms (endovascular or microsurgical). ⋯ The association between intraoperative neurophysiological monitoring changes and Glasgow outcome scale was significant for reversible changes compared against irreversible and partly reversible changes. Presence of any intraoperative neurophysiological monitoring modality change during repair of intracranial aneurysm may suggest a higher risk for postoperative neurological deficits. Reversibility of the changes is a favorable marker, whereas irreversible changes are predictive of postoperative neurological deficits with deterioration of Glasgow outcome scale on a longer follow-up.
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J Clin Neurophysiol · Oct 2014
Significance of quantitative sensory testing in the diagnosis of diabetic peripheral neuropathy.
To investigate the significance of quantitative sensory testing in the diagnosis of early diabetic peripheral neuropathy. ⋯ Quantitative sensory testing is sensitive for the diagnosis of diabetic peripheral neuropathy, especially for warm thresholds in the dorsum of the foot. Quantitative sensory testing is necessary to assist nerve conduction studies in the diagnosis of early diabetic peripheral neuropathy.
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J Clin Neurophysiol · Oct 2014
Sleep-wake transition in narcolepsy and healthy controls using a support vector machine.
Narcolepsy is characterized by abnormal sleep-wake regulation, causing sleep episodes during the day and nocturnal sleep disruptions. The transitions between sleep and wakefulness can be identified by manual scorings of a polysomnographic recording. The aim of this study was to develop an automatic classifier capable of separating sleep epochs from epochs of wakefulness by using EEG measurements from one channel. ⋯ In addition, the sleep-wake transitions were elevated in hypocretin-deficient patients. It is concluded that the classifier shows high validity for identifying the sleep-wake transition. Narcolepsy with cataplexy patients have more sleep-wake transitions during night, suggesting instability in the sleep-wake regulatory system.
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J Clin Neurophysiol · Oct 2014
An audit of continuous EEG monitoring in the neurological-neurosurgical intensive care unit.
The use of long-term continuous EEG (cEEG) monitoring in neurological-neurosurgical intensive care units (NSICU) has witnessed an exponential increase. We decided to do an audit of the long-term cEEG monitoring in our NSICU over the past 7 years (2005-2011). The study was performed to determine technical and staffing consideration for the future. ⋯ The use of long-term cEEG monitoring in the NSICU is expected to further increase in the coming years. Stricter clinical criteria for undertaking cEEG recordings are likely to increase the role and usefulness of this procedure.