Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology
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Emergent EEG (eEEG) is increasingly used in critical care practice related to neurological disorders although it involves considerable reorganization in the neurophysiology department at high cost. There is little data regarding the usefulness of eEEG in acute care situations. Our objective was to audit the practice and utility of eEEG in critical care practice in a developing country. ⋯ eEEG can provide useful information in selected clinical situations in neurological critical care. The service needs to be called upon judiciously in order to improve the efficacy of this service.
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Case Reports
Bell's palsy-induced blepharospasm relieved by passive eyelid closure and responsive to apomorphine.
We describe the case of a woman with Bell's Palsy-induced blepharospasm (BPIB) of the right eye that appeared simultaneously with a complete left facial nerve palsy. The involuntary spasm was relieved by passive lowering of the upper eyelid on the paretic side. ⋯ Our findings are in agreement with an animal model of blepharospasm that suggests a combined role of weakness of the orbicularis oculi muscle and a dysfunction of the dopaminergic system in the pathogenesis of this disorder.
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This article reviews the pathophysiology of mild traumatic brain injury, and the findings from EEG and quantitative EEG (QEEG) testing after such an injury. Research on the clinical presentation and pathophysiology of mild traumatic brain injury is reviewed with an emphasis on details that may pertain to EEG or QEEG and their interpretation. Research reports on EEG and QEEG in mild traumatic brain injury are reviewed in this setting, and conclusions are drawn about general diagnostic results that can be determined using these tests. ⋯ Complicating factors are reviewed for the proposed commercial uses of QEEG as a diagnostic test for brain injury after concussion or mild traumatic brain injury. The pathophysiology, clinical symptoms and electrophysiological features tend to clear over time after mild traumatic brain injury. There are no proven pathognomonic signatures useful for identifying head injury as the cause of signs and symptoms, especially late after the injury.
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To evaluate the immediate and long-term recovery processes of sleep and daytime vigilance in patients with sleep apnea syndrome (OSAS) after continuous CPAP treatment. ⋯ The modifications of sleep patterns and the different adjustments of phase A subtypes allow us to monitor the reorganization of sleep in OSAS patients treated with CPAP and the hierarchy of the mechanisms involved in sleep regulation.
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Clinical Trial
Evaluating the effects of spatial frequency on migraines by using pattern-reversal visual evoked potentials.
To clarify the effects of contrast and spatial frequency in patients with migraine by means of pattern-reversal visual evoked potentials (PVEPs). ⋯ These findings indicate that there is abnormal visual cortex processing in patients with migraine.