2,074 results match your criteria: "Department of Clinical Neurological Sciences[Affiliation]"

New onset refractory status epilepticus: Long-term outcomes beyond seizures.

Epilepsia

January 2025

Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada.

We propose and prioritize important outcome domains that should be considered for future research investigating long-term outcomes (LTO) after new onset refractory status epilepticus (NORSE). The study was led by the international NORSE Institute LTO Working Group. First, literature describing the LTO of NORSE survivors was identified using a PubMed search and summarized to identify knowledge gaps.

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Objective: Temporal encephaloceles (TEs) are seen in patients with drug-resistant epilepsy (DRE); yet they are also common incidental findings. Variability in institutional pre-surgical epilepsy practices and interpretation of epileptogenic network localization contributes to bias in existing epilepsy cohorts with TE, and therefore the relevance of TE in DRE remains controversial. We sought to estimate effect sizes and sample sizes necessary to demonstrate clinically relevant improvements in seizure outcome with different surgical approaches.

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Background: Equity-deserving groups are communities marginalized from institutional power by oppressive forces (e.g., racism, sexism, homophobia, ableism).

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Spike frequency adaptation in primate lateral prefrontal cortex neurons results from interplay between intrinsic properties and circuit dynamics.

Cell Rep

January 2025

Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada; Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada; Western Institute for Neuroscience, Western University, London, ON, Canada.

Cortical neurons in brain slices display intrinsic spike frequency adaptation (I-SFA) to constant current inputs, while extracellular recordings show extrinsic SFA (E-SFA) during sustained visual stimulation. Inferring how I-SFA contributes to E-SFA during behavior is challenging due to the isolated nature of slice recordings. To address this, we recorded macaque lateral prefrontal cortex (LPFC) neurons in vivo during a visually guided saccade task and in vitro in brain slices.

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Prefrontal cortex neuronal ensembles dynamically encode task features during associative memory and virtual navigation.

Cell Rep

January 2025

Western Institute for Neuroscience, Western University, London, ON, Canada; Department of Clinical Neurological Sciences, London Health Sciences Centre, Western University, London, ON, Canada; Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, ON, Canada. Electronic address:

Neuronal populations expand their information-encoding capacity using mixed selective neurons. This is particularly prominent in association areas such as the lateral prefrontal cortex (LPFC), which integrate information from multiple sensory systems. However, during conditions that approximate natural behaviors, it is unclear how LPFC neuronal ensembles process space- and time-varying information about task features.

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Why do primates have view cells instead of place cells?

Trends Cogn Sci

January 2025

Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada, N6A5B7; Department of Psychiatry, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada, N6A5B7; Department of Clinical Neurological Sciences, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada, N6A5B7. Electronic address:

Hippocampal place cells that encode the spatial location of an individual during navigation are widely reported in rodents. However, studies in primates have instead reported hippocampal cells that encode views of the environment. Evolutionary adaptations for navigating during night and day may explain the divergence of hippocampal representations between species.

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Diagnosing progressive multifocal leukoencephalopathy: Positive predictive value of CSF JC virus quantitative PCR and importance of recognizing suggestive neuroimaging findings.

J Neurol Sci

January 2025

Department of Clinical Neurological Sciences, Western University, London Health Sciences Centre, London, Ontario, Canada; Department of Pathology and Laboratory Medicine, Western University, London Health Sciences Centre, London, Ontario, Canada. Electronic address:

Objective: To determine the positive predictive value (PPV) of CSF John Cunningham virus (JCV) quantitative PCR (qPCR) for progressive multifocal leukoencephalopathy (PML), and highlight neuroimaging findings reported to be suggestive of this disease.

Methods: We reviewed patients at London Health Sciences Centre with a positive CSF JCV qPCR result. Patients were classified as true-positive if they had a clinico-radiographic presentation compatible with PML and no more likely alternative diagnosis.

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Objective: To describe the lived experience of patients with NORSE and explore quality of life (QOL) for patients and their caregivers.

Background: NORSE is a rare condition characterized by refractory status epilepticus, often of unknown cause, in a previously neurologically healthy individual. Febrile infection-related epilepsy syndrome (FIRES) is a subset of NORSE.

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Background: Secondary stroke prevention in patients with atrial fibrillation (AF) is one of the fastest growing areas in the field of cerebrovascular diseases. This Scientific statement from the World Stroke Organization Brain & Heart Task Force provides a critical analysis of the strength of current evidence this topic, highlights areas of current controversy, identifies knowledge gaps, and proposes priorities for future research.

Methods: We select topics with the highest clinical relevance and perform a systematic search to answer specific practical questions.

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Extraocular muscle (EOM) enlargement occurs in both acromegaly and Graves' disease, but the degree and pattern of enlargement have not been directly compared in these patient groups. This study investigated whether acromegaly and Graves' orbitopathy (GO) are associated with different patterns of EOM enlargement at the time of diagnosis. Retrospective cohort.

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Objective: Stereotactic laser amygdalohippocampotomy (SLAH) is a minimally invasive procedure for mesial temporal lobe epilepsy that preserves more tissue than open procedures. As a result, although patients have better functional outcomes, more patients do not achieve seizure freedom. The rate at which this occurs is evolving with improved surgical practices.

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In modern times, achieving precise drug delivery through a safe and stable carrier remains a significant challenge. In this study, we synthesized a novel ligand based on a guanazole Schiff base and subsequently developed new metal-organic framework (MOF) named UWO-1 through a reaction involving zinc acetate. At the same time, curcumin (CUR) was loaded onto the newly synthesized UWO-1.

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Background: Resting-state networks (RSNs), particularly the sensorimotor network, begin to strengthe in the third trimester of pregnancy and mature extensively by term age. The integrity and structure of these networks have been repeatedly linked to neurological health outcomes in neonates, highlighting the importance of understanding the normative variations in RSNs in healthy development. Specifically, robust bilateral functional connectivity in the sensorimotor RSN has been linked to optimal neurodevelopmental outcomes in neonates.

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Article Synopsis
  • The recovery patterns following intracerebral hemorrhage (ICH) are distinct from those of ischemic stroke, featuring a unique timeline for functional improvements.
  • Research shows that ICH recovery usually starts slowly in the initial weeks, with significant gains often seen within the first three months, followed by more gradual progress up to six months and beyond.
  • Understanding these specific recovery trajectories is essential for providing better prognosis, healthcare strategies, and guided interventions in ICH treatment and research.
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Background: Stroke incidence remains a significant concern despite optimized prevention strategies. Colchicine shows potential for improving stroke prevention globally.

Aims: To summarize efficacy and safety estimates from systematic reviews and meta-analyses (SRMAs) of randomized controlled trials (RCTs) comparing colchicine to usual care or placebo for stroke prevention.

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The Canadian Consortium on Neurodegeneration in Aging (CCNA) was created by the Canadian federal government through its health research funding agency, the Canadian Institutes for Health Research (CIHR), in 2014, as a response to the G7 initiative to fight dementia. Two five-year funding cycles (2014-2019; 2019-2024) have occurred following peer review, and a third cycle (Phase 3) has just begun. A unique construct was mandated, consisting of 20 national teams in Phase I and 19 teams in Phase II (with research topics spanning from basic to clinical science to health resource systems) along with cross-cutting programs to support them.

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Magnitude and Time-Course of Dementia Risk in Stroke Survivors: A Population-Wide Matched Cohort Study.

Neurology

January 2025

From the Division of Neurology (R.A.J., M.S.), Hamilton Health Sciences, McMaster University & Population Health Research Institute, Hamilton; ICES (J.F., P.C.A., A.Y.X.Y.), Toronto, Ontario; Departments of Clinical Neurosciences and Community Health Sciences (E.E.S., A.G.), Cumming School of Medicine, University of Calgary, Alberta; Division of Neurology (A.Y.X.Y.), Department of Medicine, Sunnybrook Health Sciences Centre, University of Toronto; Robarts Research Institute (V.H., L.A.S.), Department of Clinical Neurological Sciences, and Department of Epidemiology and Biostatistics, University of Western Ontario, London; and Division of General Internal Medicine (M.K.K.), Department of Medicine, University of Toronto-University Health Network, Ontario, Canada.

Article Synopsis
  • Stroke survivors have a significantly higher risk of developing dementia compared to matched non-stroke populations, with a 1.76 hazard ratio for dementia risk after stroke.
  • In a large-scale study of over 15 million individuals in Ontario, 18.7% of stroke survivors were diagnosed with dementia after a mean follow-up of 5.6 years, compared to 12.5% in the general population.
  • The study found that the risk of dementia is particularly high within the first year after a stroke, with a 2.5-fold increase, though this risk decreases over time.
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Background: Endovascular thrombectomy (EVT) is the standard of care for patients with acute ischemic stroke (AIS) and intracranial vessel occlusion. Tandem occlusions (TO) comprise 20% of all anterior circulation AIS and are related to a poorer prognosis. The optimal EVT treatment strategy remains controversial.

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Article Synopsis
  • * The study aimed to explore how genetic variants connected to neurotransmitter systems and brain atrophy relate to apathy in individuals with MCI and AD.
  • * Findings revealed a significant association between apathy and the presence of an ε4 allele along with specific genetic markers related to dopamine, suggesting potential new avenues for treatment and clinical trials targeting apathy in AD.
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Introduction: Freezing of gait (FOG) is a debilitating episodic gait disorder that significantly reduces the quality of life (QoL) in patients with Parkinson's disease (PD). Diagnosing and treating FOG remains a major medical challenge. This study aimed to assess the correlation between FOG and both motor and non-motor clinical characteristics in patients with PD.

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Article Synopsis
  • * Results suggested that while ECG-AF had a lower risk of IS recurrence within the first year after the stroke, over the longer term, there was no significant difference compared to KAF.
  • * Prolonged monitoring (AFDAS) consistently showed a lower risk for recurrent IS compared to KAF throughout the study, indicating potential advantages in identifying AF later on in terms of treatment outcomes.
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Objective: Cerebral spinal fluid (CSF) diversion methods, including ventriculoperitoneal (VP) shunts, are the standard treatment for hydrocephalus. Hair clipping (HC) has been a routine neurosurgical practice of the great majority of neurosurgeons, due to the perception that this will either decrease the risk of shunt infection or allow for a faster, unimpeded opening and closing of the skin. The benefits of not cutting or clipping hair in terms of normalizing appearance and self-esteem are obvious.

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