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Total 119 results found since Jan 2013.

Converting sounds to meaning with ventral semantic language networks: integration of interdisciplinary data on brain connectivity, direct electrical stimulation and clinical disconnection syndromes
AbstractNumerous traditional linguistic theories propose that semantic language pathways convert sounds to meaningful concepts, generating interpretations ranging from simple object descriptions to communicating complex, analytical thinking. Although the dual-stream model of Hickok and Poeppel is widely employed, proposing a dorsal stream, mapping speech sounds to articulatory/phonological networks, and a ventral stream, mapping speech sounds to semantic representations, other language models have been proposed. Indeed, despite seemingly congruent models of semantic language pathways, research outputs from varied specialis...
Source: Anatomy and Embryology - March 10, 2022 Category: Anatomy Source Type: research

Magnetic Resonance pH Imaging in Stroke – Combining the Old With the New
The study of stroke has historically made use of traditional spectroscopy techniques to provide the ground truth for parameters like pH. However, techniques like 31P spectroscopy have limitations, in particular poor temporal and spatial resolution, coupled with a need for a high field strength and specialized coils. More modern magnetic resonance spectroscopy (MRS)-based imaging techniques like chemical exchange saturation transfer (CEST) have been developed to counter some of these limitations but lack the definitive gold standard for pH that 31P spectroscopy provides. In this perspective, both the traditional (31P spectr...
Source: Frontiers in Physiology - February 3, 2022 Category: Physiology Source Type: research

Indices of Loading and Propulsive Ability in the Gait of Patients With Chronic Stroke With Equinus Foot Deviation: A Correlation Study
In this study, we analyzed the correlation between the indices of dynamic loading and propulsion ability of 40 chronic hemiparetic post-stroke patients with equinus foot deviation and a set of clinical assessments of ankle joint deviations and walking ability. Ankle passive and active range of motion (ROM) and triceps surae spasticity were considered, along with walking speed and three complementary scales of walking ability focusing respectively on the need for assistance on functional mobility, including balance and transfers, and the limitation in social participation. The correlation between the ground reaction force-b...
Source: Frontiers in Human Neuroscience - January 14, 2022 Category: Neuroscience Source Type: research

Caveats to Acute Imaging for Acute Stroke in the Setting of Venoarterial Extracorporeal Membrane Oxygenation
Venoarterial extracorporeal membrane oxygenation (VA-ECMO) is increasingly used for cardiorespiratory support in medically refractory cases. The high rate of neurologic complications, specifically cerebrovascular disorders such as acute ischemic stroke, in VA-ECMO patients frequently prompts the acquisition of neuroimaging studies such as CT with angiography and perfusion imaging. Clinicians must be familiar with the ECMO-related artifacts when interpreting such studies. Here, we describe a case of asymmetric contrast opacification in a VA-ECMO patient with axillary artery cannulation.
Source: Neurology Clinical Practice - December 13, 2021 Category: Neurology Authors: Viamonte, M. A., Yu, J., Echevarria, F. D., Nagae, L., Youn, T. S., Tahsili-Fahadan, P., Simpkins, A. N. Tags: Stroke in young adults, CT, All Cerebrovascular disease/Stroke Case Source Type: research

Language and Aphasias
This article reveals how it is possible for a brain composed of 100 billion highly interconnected, lipid-encased, reticular electrochemical devices to support complex functions such as language and how language disorders can be understood as a reflection of degradation of one or more domains of knowledge. RECENT FINDINGS Ongoing research, building on landmark work regarding parallel distributed processing (PDP), provides the basis for understanding cognitive functions as a manifestation of the activity of populations of millions or billions of neurons in various highly interconnected networks. Population encoding ne...
Source: CONTINUUM: Lifelong Learning in Neurology - December 1, 2021 Category: Neurology Tags: REVIEW ARTICLES Source Type: research

Hyperfine forms medical advisory board
Hyperfine has formed a medical advisory board composed of physicians from acros...Read more on AuntMinnie.comRelated Reading: Portable MRI developer Hyperfine sets sights on Europe Hyperfine hires chief people officer Portable MRI helps clarify stroke symptoms more quickly Hyperfine appoints new CFO Hyperfine to gain Nasdaq listing through SPAC merger
Source: AuntMinnie.com Headlines - October 15, 2021 Category: Radiology Source Type: news

Left atrial conduit function: A short review
Atrial conduit is an “intriguing” parameter that conveys a noninvasive picture of the complex atrioventricular coupling condition in diastole and its backward effects on the right side of the heart and the pulmonary circulation. Given the easiness associated with its correctly performed quantification in the imaging laboratory, I am sure that conduit will survive the competitive access to the list of valuable parameters capable of deciphering, although not necessarily simplifying, the complex diastolic scenario in health and disease. AbstractThree-dimensional echocardiography can elucidate the phasic functions of the l...
Source: Physiological Reports - October 4, 2021 Category: Physiology Authors: Paolo N. Marino Tags: REVIEW Source Type: research

Right Ventricular Volumes, Ejection Fraction, and Systolic Function Indices in Normal Neonates by Three-Dimensional Speckle-Tracking Echocardiography
AbstractThe aim of this study was to test the feasibility of measuring right ventricular (RV) volumes, ejection fraction (EF), and systolic function indices in neonates using three-dimensional speckle-tracking echocardiography (3D-STE). Thirty-eight neonates underwent complete echocardiographic evaluation, including the acquisition of three full-volume 3D datasets or more from each of the apical, parasternal, and subcostal windows while naturally sleeping. Datasets were analyzed using a commercially available software (Tomtec). Global RV 3D volumes and EF were measured. In addition, 2D free wall longitudinal strain (LS), t...
Source: Pediatric Cardiology - September 1, 2021 Category: Cardiology Source Type: research

A review of patient-led data acquisition for atrial fibrillation detection to prevent stroke
Publication date: August 2021Source: Biomedical Signal Processing and Control, Volume 69Author(s): Murtadha Kareem, Ningrong Lei, Ali Ali, Edward J. Ciaccio, U. Rajendra Acharya, Oliver Faust
Source: Biomedical Signal Processing and Control - June 26, 2021 Category: Biomedical Science Source Type: research

Computed Tomography Imaging Predictors of Intracerebral Hemorrhage Expansion
AbstractPurpose of ReviewHematoma expansion (HE) is strongly associated with poor clinical outcome and is a compelling target for improving outcome after intracerebral hemorrhage (ICH). Non-contrast computed tomography (NCCT) is widely used in clinical practice due to its faster acquisition at the presence of acute stroke. Recently, imaging markers on NCCT are increasingly used for predicting HE. We comprehensively review the current evidence on HE prediction using NCCT and provide a summary for assessment of these markers in future research studies.Recent FindingsPredictors of HE on NCCT have been described in reports of ...
Source: Current Neurology and Neuroscience Reports - March 12, 2021 Category: Neuroscience Source Type: research

Sensors, Vol. 21, Pages 1806: Development of a Low-Cost, Modular Muscle –Computer Interface for At-Home Telerehabilitation for Chronic Stroke
We describe our modular electromyography acquisition, processing, and feedback algorithms to train differentiated muscle control during at-home therapist-guided sessions. Additionally, we evaluated the performance of low-cost sensors for our training task with two healthy individuals. Finally, we present the results of a case study with a stroke survivor who used the system for 40 sessions over 10 weeks of training. In line with our previous research, our results suggest that using low-cost sensors provides similar results to those using research-grade sensors for low forces during an isometric task. Our preliminary case s...
Source: Sensors - March 5, 2021 Category: Biotechnology Authors: Octavio Marin-Pardo Coralie Phanord Miranda Rennie Donnelly Christopher M. Laine Sook-Lei Liew Tags: Article Source Type: research

Whatcom County (WA) Seeks Better, Cheaper Answer to 911 Call Centers
Robert Mittendorf The Bellingham Herald (Bellingham, Wash.) (MCT) Dec. 15—Combining Whatcom County’s two 911 dispatch centers, whose operators separately send law-enforcement officers or firefighters to calls for service, is back on the County Council’s agenda. It’s both logical and a cost-saving measure to combine the two 911 centers, said Councilman Tyler Byrd. “I’ve been working on all the documentation I can find on this and talking to people. I can’t find a single efficiency that comes out of this the way it is today,” Byrd said during a No...
Source: JEMS Patient Care - December 15, 2020 Category: Emergency Medicine Authors: JEMS Staff Tags: Communications & Dispatch News News Feed Source Type: news