Single neuron dynamics during experimentally induced anoxic depolarization

We studied single neuron dynamics during anoxic depolarizations, which are often observed in cases of neuronal energy depletion. Anoxic and similar depolarizations play an important role in several pathologies, notably stroke, migraine, and epilepsy. One of the effects of energy depletion was experimentally simulated in slices of rat cortex by blocking the sodium-potassium pumps with ouabain. The membrane voltage of pyramidal cells was measured. Five different kinds of dynamical behavior of the membrane voltage were observed during the resulting depolarizations. Using bifurcation analysis of a single cell model, we show that these voltage dynamics all are responses of the same cell, with normally functioning ion channels, to particular courses of the intra- and extracellular concentrations of sodium and potassium.
Source: Journal of Neurophysiology - Category: Neurology Authors: Tags: Articles Source Type: research

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AbstractThe recent pandemic outbreak of coronavirus is pathogenic and a highly transmittable viral infection caused by Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV2). In this time of ongoing pandemic, many emerging reports suggested that the SARS-CoV-2 has inimical effects on neurological functions, and even causes serious neurological damage. The neurological symptoms associated with COVID-19 include headache, dizziness, depression, anosmia, encephalitis, stroke, epileptic seizures, and Guillain-Barre syndrome along with many others. The involvement of the CNS may be related with poor prognosis and disease wo...
Source: Journal of NeuroVirology - Category: Neurology Source Type: research
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Source: CONTINUUM: Lifelong Learning in Neurology - Category: Neurology Tags: REVIEW ARTICLES Source Type: research
ConclusionWe present the second case of recurrent ischemic strokes in a patient withCACNA1A mutation. Our findings expand the phenotypic heterogeneity related to Cav2.1 (P/Q‐type) calcium channel dysfunction and suggest consideration ofCACNA1A disorder in evaluation of pediatric strokes.
Source: Molecular Genetics & Genomic Medicine - Category: Genetics & Stem Cells Authors: Tags: CLINICAL REPORT Source Type: research
Conclusions Despite theoretical concerns about its validity, the PHQ-9 performed well at its standard cut-point of 10. Consistent with the literature, being able to use a validated, brief tool that is available publicly should improve case finding of depression in neurologic populations. When considering clinical practicality along with the findings of this analyzed, this study confirmed that the PHQ-9 is valid in a general outpatient neurologic population.
Source: Neurology Clinical Practice - Category: Neurology Authors: Tags: Cost effectiveness/economic, Diagnostic test assessment, All Clinical Neurology, Depression, All epidemiology Research Source Type: research
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Source: Infezioni in Medicina - Category: Infectious Diseases Tags: Infez Med Source Type: research
AbstractPurpose of ReviewTo provide an updated review of the pathophysiology, diagnosis, and management of migraine with aura.Recent FindingsThalamic and other subcortical regions may play a role in the pathophysiology of migraine. There is inter-patient and intra-patient attack variability in the characteristics of typical aura especially visual aura symptoms. Migraine with brainstem aura may originate cortically. Migraine with retinal aura may be associated with structural and functional changes in the retina.SummaryAlthough cortical spreading depression (CSD) continues to be the predominant theory surrounding the pathop...
Source: Current Neurology and Neuroscience Reports - Category: Neuroscience Source Type: research
Abstract PURPOSE OF REVIEW: To provide an updated review of the pathophysiology, diagnosis, and management of migraine with aura. RECENT FINDINGS: Thalamic and other subcortical regions may play a role in the pathophysiology of migraine. There is inter-patient and intra-patient attack variability in the characteristics of typical aura especially visual aura symptoms. Migraine with brainstem aura may originate cortically. Migraine with retinal aura may be associated with structural and functional changes in the retina. Although cortical spreading depression (CSD) continues to be the predominant theory surround...
Source: Epilepsy Curr - Category: Neurology Authors: Tags: Curr Neurol Neurosci Rep Source Type: research
No abstract available
Source: Neurology Today - Category: Neurology Tags: For Your Patients Source Type: research
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Source: Revista de Neurologia - Category: Neurology Authors: Tags: Rev Neurol Source Type: research
ConclusionsIn appropriately selected patients, FDG-PET scans while in burst suppression may help dissect the underlying pathophysiologic cause of IIC findings observed on EEG and guide tailored therapy.
Source: Neurocritical Care - Category: Neurology Source Type: research
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