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Procedure: Ultrasound

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Total 26 results found since Jan 2013.

Ultrasound Deep Brain Stimulation Modulates Body Temperature in Mice
Body temperature plays a critical role in rehabilitation, and numerous studies proved that the regulation of body temperature contributes to the sensorimotor recovery of patients with brain diseases such as stroke. The hypothalamus plays a key role in thermoregulation. Ultrasound deep brain stimulation (UDBS) can noninvasively modulate deep brain nuclei and have potential applications in the treatment of Parkinson’s disease, Alzheimer’s disease, and depression, among others. The purpose of this study was to investigate whether ultrasound stimulation of the hypothalamus could regulate body temperature in free-...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - July 15, 2022 Category: Neuroscience Source Type: research

Assessing Postvoid Residual to Identify Risk for Urinary Complications Post Stroke
CONCLUSION: Identifying the risk for urinary complications post stroke can lead to early interventions that can improve recovery. This also allows for specific patient education related to preventative measures to reduce risk of urinary complications. The use of a specific bladder scanning protocol is recommended as standard practice for all patients admitted with stroke.
Source: Journal of Neuroscience Nursing - September 3, 2020 Category: Neuroscience Tags: Evidence-Based Practice Source Type: research

Deep Cerebellar Low-Intensity Focused Ultrasound Stimulation Restores Interhemispheric Balance after Ischemic Stroke in Mice
Ischemic damage after stroke disrupts the complex balance of inhibitory and excitatory activity within cortical network causing brain functional asymmetry. Cerebellar deep nuclei with its extensive projections to cortical regions could be a prospective target for stimulation to restore inter-hemispheric balance and enhance neural plasticity after stroke. In our study, we repeatedly stimulated the lateral cerebellar nucleus (LCN) by low-intensity focused ultrasound (LIFU) for 3 days to enhance rehabilitation after middle cerebral artery occlusion (MCAO) in a mouse stroke model. The neural activity of the mice sensorimotor c...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - August 31, 2020 Category: Neuroscience Source Type: research

Chronic Imaging of Mouse Brain: From Optical Systems to Functional Ultrasound.
Abstract Utilization of functional ultrasound (fUS) in cerebral vascular imaging is gaining popularity among neuroscientists. In this article, we describe a chronic surgical preparation method that allows longitudinal studies and therefore is applicable to a wide range of studies, especially on aging, stroke, and neurodegenerative diseases. This method can also be used with awake mice; hence, the deleterious effects of anesthesia on neurovascular responses can be avoided. In addition to fUS imaging, this surgical preparation allows researchers to take advantage of common optical imaging methods to acquire compleme...
Source: Current Protocols in Neuroscience - June 27, 2020 Category: Neuroscience Authors: Kılıç K, Tang J, Erdener ŞE, Sunil S, Giblin JT, Lee BS, Postnov DD, Chen A, Boas DA Tags: Curr Protoc Neurosci Source Type: research

In-Vivo Study of Passive Musculotendon Mechanics in Chronic Hemispheric Stroke Survivors
We report that, on the aggregate and with respect to contralateral and control, respectively, the affected side initiates feature motion at a shorter indentation distance by 61% and 50%, travels further by 15% and 9%, at a lower rate of 28% and 15%, and is stiffer by 40% and 57%. In an extended analysis including the spatial location of the 8 designated features, we report that in contrast to the contralateral and control muscles, the affected musculotendon unit does not strain measurably within the imaging window. These results confirm that chronic stroke-induced spa...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - March 31, 2020 Category: Neuroscience Source Type: research

Long-term exercise confers equivalent neuroprotection in females despite lower cardiorespiratory fitness
Publication date: Available online 19 December 2019Source: NeuroscienceAuthor(s): Christopher J. Marley, Julien V. Brugniaux, Danielle Davis, Thomas A. Calverley, Thomas S. Owens, Benjamin S. Stacey, Hayato Tsukamoto, Shigehiko Ogoh, Phillip N. Ainslie, Damian M. BaileyAbstractFemales are more prone to cognitive decline, stroke and neurodegenerative disease, possibly due to more marked reductions in cerebral blood flow and cerebrovascular reactivity to CO2 (CVRCO2HYPER) in later life. To what extent regular exercise confers selective neuroprotection in females remains unestablished. To examine this, 73 adults were prospect...
Source: Neuroscience - December 20, 2019 Category: Neuroscience Source Type: research

Cerebrovascular Correlates of Subclinical Attentional Disturbances in Non-stroke Cardiovascular Disease
Publication date: Available online 1 November 2019Source: NeuroscienceAuthor(s): Kayla B. Stefanidis, Ben Isbel, Timo Klein, Jim Lagopoulos, Christopher D. Askew, Mathew J. SummersAbstractEvidence suggests that cerebrovascular hemodynamic disturbances underlie cognitive deterioration secondary to cardiovascular disease (CVD), including manifestations other than stroke, but the mechanisms remain unclear. To date, the majority of studies have used neuropsychological measures validated for the detection of clinically significant cognitive decline but lack the sensitivity to accurately detect subclinical or subtle cognitive ch...
Source: Neuroscience - November 3, 2019 Category: Neuroscience Source Type: research

Influence of neurovascular mechanisms on response to tDCS: an exploratory study.
In this study, we examined the effects of tDCS on cerebral blood velocity (CBv) in chronic stroke survivors using transcranial Doppler (TCD) ultrasound in relation to changes in CME and described the neurovascular characteristics of tDCS responders. Middle cerebral artery (MCA) CBv, cerebrovascular resistance (CVRi) and other cerebral hemodynamics-related variables were continuously measured before and after 15 min of 1 mA anodal tDCS to the lesioned lower limb M1. tDCS did not modulate CBv in the whole group and upon TMS-based stratification of responders and non-responders. However, at baseline, responders demonstrate...
Source: Experimental Brain Research - August 26, 2019 Category: Neuroscience Authors: Iyer PC, Rosenberg A, Baynard T, Madhavan S Tags: Exp Brain Res Source Type: research

Carotid artery plaque detected on ultrasound is associated with impaired cognitive state in the elderly: A population-based study in Wakiso district, Uganda
This study set out to determine the prevalence of abnormal carotid ultrasound findings and their association with cognitive function among the adults ≥60 years in Wakiso district, Uganda in 2018. A total of 210 participants were included. Carotid artery stenosis, presence of plaque, stenosis and intima-media thickness were assessed by ultrasound. Cognitive status was assessed using a Mini Mental State Exam (MMSE) test. The prevalence of plaque was 21.4%. Variables which included; presence of plaque, age, education, gender, marital status, whether participant stayed alone or with someone else, care for self, occupation ...
Source: Journal of Clinical Neuroscience - July 12, 2019 Category: Neuroscience Source Type: research

Shear Waves Reveal Viscoelastic Changes in Skeletal Muscles After Hemispheric Stroke
We investigated alterations in material properties such as elasticity and viscoelasticity of stroke-affected muscles using ultrasound induced shear waves and mechanical models. We used acoustic radiation force to generate shear waves along fascicles of biceps muscles and measured their propagation velocity. The shear wave data were collected in muscles of 13 hemiplegic stroke survivors under passive conditions at 90°, 120°, and 150° elbow flexion angles. In a viscoelastic medium, as opposed to a purely elastic medium, the shear wave propagation velocity depends on the frequency content of the induced w...
Source: IEE Transactions on Neural Systems and Rehabilitation Engineering - October 1, 2018 Category: Neuroscience Source Type: research

Does epiaortic ultrasound screening reduce perioperative stroke in patients undergoing coronary surgery? A topical review
Publication date: Available online 3 February 2018 Source:Journal of Clinical Neuroscience Author(s): Asad Ikram, Hafsa Mohiuddin, Aisha Zia, Hafiz Umair Siddiqui, Hoda Javadikasgari, Marijan Koprivanac, Sajjad Raza, Atif Zafar Although the occurrence of stroke in patients undergoing coronary artery bypass grafting (CABG) is decreasing, it remains an important concern. Therefore, it is important to identify and adopt strategies that can decrease the incidence of stroke in these patients. One of the strategies that have demonstrated the potential to decrease the rate of post-CABG stroke is an assessment of aorta for athero...
Source: Journal of Clinical Neuroscience - February 3, 2018 Category: Neuroscience Source Type: research

Flow diversion within seven days after stroke onset is associated with favorable outcome in anterior circulation stroke
Publication date: Available online 21 July 2017 Source:Journal of Clinical Neuroscience Author(s): Fei Wu, Wenjie Cao, Yifeng Ling, Lumeng Yang, Xin Cheng, Qiang Dong Anterior cerebral artery (ACA) flow diversion (FD), defined as ipsilateral mean velocity (MV) of at least 30% greater than the contralateral artery, could be seen an indirect sign of leptomeningeal collateralization in the setting of middle cerebral artery occlusion. The purpose of the study was to evaluate the association between dynamic FD and functional outcome in acute anterior stroke patients with large artery occlusion. Acute middle cerebral artery (MC...
Source: Journal of Clinical Neuroscience - July 21, 2017 Category: Neuroscience Source Type: research

Secondary Stroke Prevention in Cryptogenic Stroke and Embolic Stroke of Undetermined Source (ESUS)
AbstractPurpose of the ReviewThe purpose of the study was to review the literature on cryptogenic stroke and embolic stroke of undetermined stroke (ESUS). Cryptogenic stroke according to TOAST criteria is a stroke which is not due to cardiogenic embolism, small vessel disease with lacunes or large vessel disease of brain supplying arteries. In the context of secondary stroke prevention studies, cryptogenic stroke is not operationally defined.Recent FindingsThe new concept of “embolic stroke of undetermined source” (ESUS) provides an operational definition. ESUS is diagnosed as a non-lacunar stroke on cerebral imaging a...
Source: Current Neurology and Neuroscience Reports - July 13, 2017 Category: Neuroscience Source Type: research

Is carpal tunnel syndrome present in acute stroke patients? An investigative study using clinical and imaging screening tools
Publication date: Available online 10 February 2017 Source:Journal of Clinical Neuroscience Author(s): Chen Lin, Aaron I. Loochtan, Brian Dresser, Jianhong Chang, Alfredo E. Farjat, Kingshuk Choudhury, Lisa D. Hobson-Webb Carpal tunnel syndrome (CTS) is known to develop post-stroke. Median nerve ultrasound (US) is an inexpensive, effective means of screening. In this prospective feasibility study, we compared the ability of the physical exam, the Boston Carpal Tunnel Questionnaire (BCTQ) and median nerve US to screen for carpal tunnel syndrome (CTS) within 72hours of stroke onset. We enrolled 24 consecutive patients. Usin...
Source: Journal of Clinical Neuroscience - February 10, 2017 Category: Neuroscience Source Type: research

The effects of ultrasound-guided corticosteroid injection for the treatment of hemiplegic shoulder pain on depression and anxiety in patients with chronic stroke
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Source: International Journal of Neuroscience - January 25, 2017 Category: Neuroscience Authors: Min Cheol Chang Source Type: research