Neurology Alert
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Polyneuropathy and Nutrition
Other than the identification of a specific vitamin or essential element deficiency, overall nutritional status does not appear to play any role in the development of idiopathic neuropathies in adults.
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Lamotrigine for Myotonia
SYNOPSIS: In a randomized, double-blind, placebo-controlled treatment trial of patients with non-dystrophic myotonia, those treated with lamotrigine experienced significant improvement.
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REM Sleep, Not Slow-wave Sleep, Decreases Dementia Risk
In a series of clinical studies of cognitively normal people older than 60 years of age, disruption of REM sleep and reduced quantity of REM sleep increased the risk of developing Alzheimer-type dementia.
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Tau as a Biomarker of Acute and Chronic Traumatic Brain Injury
The ongoing search for reliable biomarkers of traumatic brain injury repeatedly has demonstrated the reliability of using plasma phosphor-tau levels to help distinguish injury from normal, and severe injury from mild injury.
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Taste, Smell, and the Insular Cortex
Olfaction and taste appear to be localized in the insular cortex with bilateral representation.
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Optimizing Electromyography in ALS
In the appropriate clinical setting, electromyography studies of multiple, distal muscle groups in three separate spinal regions showing acute and chronic denervation, are pathognomonic for the diagnosis of amyotrophic lateral sclerosis.
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EEG-based Metrics After Severe Brain Injury
In this cohort study of 104 patients with disorders of consciousness, the authors demonstrated a strong correlation between EEG-based metrics and clinical diagnosis using quantitative behavioral scales, brain metabolism as measured by PET, and clinical outcomes at one year.
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Risk Factors for Seizures in Critically Ill Patients Monitored by Continuous EEG
Investigators prospectively analyzed 72-hour continuous electroencephalograms to identify clinical and electroencephalogram risk factors for having seizures and developed a model for “time-dependent” seizure risk. Electrographic seizures occurred in 23% of all patients. The only significant clinical predictors of seizures were presence of coma and prior clinical seizure history.
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P-syn in Nerve Fibers on Skin Biopsy May Help Diagnose Dementia with Lewy Bodies
This study compared 18 subjects diagnosed with dementia with Lewy bodies (DLB), 23 with nonsynucleinopathy dementia, and 25 healthy controls and demonstrated that phosphorylated alpha-synuclein was found only in the skin nerve fibers of DLB subjects, helping distinguish this type of dementia from other types.
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Is Sleep a Clue to a Modifiable Risk Factor for Alzheimer’s Disease?
Evidence is accumulating that disruptions in sleep patterns, particularly slow-wave and REM sleep, alter amyloid-β production and clearance through the cerebrospinal fluid pathways and may play a role in the development of Alzheimer’s disease.