keyword
MENU ▼
Read by QxMD icon Read
search

Hemispheric stroke

keyword
https://www.readbyqxmd.com/read/27913798/generalizability-of-the-maximum-proportional-recovery-rule-to-visuospatial-neglect-early-poststroke
#1
Caroline Winters, Erwin E H van Wegen, Andreas Daffertshofer, Gert Kwakkel
Background and objective Proportional recovery of upper-extremity motor function and aphasia after stroke may suggest common mechanisms for spontaneous neurobiological recovery. This study aimed to investigate if the proportional recovery rule also applies to visuospatial neglect (VSN) in right-hemispheric first-ever ischemic stroke patients and explored the possible common underlying mechanisms. Methods Patients with upper-limb paresis and VSN were included. Recovery defined as the change in Letter Cancellation Test (LCT) score at ~8 days and 6 months poststroke...
December 2, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27913200/pharyngeal-swallowing-mechanics-secondary-to-hemispheric-stroke
#2
Nelson H May, Jessica M Pisegna, Sarah Marchina, Susan E Langmore, Sandeep Kumar, William G Pearson
BACKGROUND: Computational analysis of swallowing mechanics (CASM) is a method that utilizes multivariate shape change analysis to uncover covariant elements of pharyngeal swallowing mechanics associated with impairment using videofluoroscopic swallowing studies. The goals of this preliminary study were to (1) characterize swallowing mechanics underlying stroke-related dysphagia, (2) decipher the impact of left and right hemispheric strokes on pharyngeal swallowing mechanics, and (3) determine pharyngeal swallowing mechanics associated with penetration-aspiration status...
November 29, 2016: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/27909202/prediction-of-blood-brain-barrier-disruption-and-intracerebral-hemorrhagic-infarction-using-arterial-spin-labeling-magnetic-resonance-imaging
#3
Takeya Niibo, Hajime Ohta, Shirou Miyata, Ichiro Ikushima, Kazuchika Yonenaga, Hideo Takeshima
BACKGROUND AND PURPOSE: Arterial spin-labeling magnetic resonance imaging is sensitive for detecting hyperemic lesions (HLs) in patients with acute ischemic stroke. We evaluated whether HLs could predict blood-brain barrier (BBB) disruption and hemorrhagic transformation (HT) in acute ischemic stroke patients. METHODS: In a retrospective study, arterial spin-labeling was performed within 6 hours of symptom onset before revascularization treatment in 25 patients with anterior circulation large vessel occlusion on baseline magnetic resonance angiography...
December 1, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27909201/infarct-pattern-and-collateral-status-in-adult-moyamoya-disease-a-multimodal-magnetic-resonance-imaging-study
#4
Dong Yeop Kim, Jeong Pyo Son, Je Young Yeon, Gyeong-Moon Kim, Jong-Soo Kim, Seung-Chyul Hong, Oh Young Bang
BACKGROUND AND PURPOSE: Moyamoya disease (MMD) is a unique cerebrovascular disease characterized by the progressive stenosis of large intracranial arteries and a hazy network of basal collaterals, called moyamoya vessels. Although hemodynamic studies have been applied in MMD patients, the mechanisms of stroke in MMD are still unclear. The present study evaluated the infarct pattern and collateral status using multimodal magnetic resonance imaging in MMD patients. METHODS: Adult MMD patients with acute ischemic stroke were prospectively recruited, and infarct pattern on diffusion-weighted imaging was evaluated...
December 1, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27909000/distinct-contributions-of-dorsal-and-ventral-streams-to-imitation-of-tool-use-and-communicative-gestures
#5
Andrea Dressing, Kai Nitschke, Dorothee Kümmerer, Tobias Bormann, Lena Beume, Charlotte S M Schmidt, Vera M Ludwig, Irina Mader, Klaus Willmes, Michel Rijntjes, Christoph P Kaller, Cornelius Weiller, Markus Martin
Imitation of tool-use gestures (transitive; e.g., hammering) and communicative emblems (intransitive; e.g., waving goodbye) is frequently impaired after left-hemispheric lesions. We aimed 1) to identify lesions related to deficient transitive or intransitive gestures, 2) to delineate regions associated with distinct error types (e.g., hand configuration, kinematics), and 3) to compare imitation to previous data on pantomimed and actual tool use. Of note, 156 patients (64.3 ± 14.6 years; 56 female) with first-ever left-hemispheric ischemic stroke were prospectively examined 4...
November 30, 2016: Cerebral Cortex
https://www.readbyqxmd.com/read/27905989/the-histone-deacetylase-inhibitor-sodium-butyrate-exhibits-neuroprotective-effects-for-ischemic-stroke-in-middle-aged-female-rats
#6
Min Jung Park, Farida Sohrabji
BACKGROUND: Sodium butyrate (NaB) is a histone deacetylase (HDAC) inhibitor exhibiting anti-inflammatory and neuroprotective effects in a rat ischemic model of stroke as well as a myocardial ischemia model. Although clinical evidence shows that older women are at higher risk for stroke occurrence and greater stroke severity, no studies have evaluated the effectiveness of NaB either in females or in older animals. METHODS: To determine the effects of NaB on stroke in older females, acyclic middle-aged Sprague-Dawley female rats (9-11 months old, constant diestrus) were subject to middle cerebral artery occlusion (MCAo) by intracerebral injection of recombinant endothelin-1...
December 1, 2016: Journal of Neuroinflammation
https://www.readbyqxmd.com/read/27905386/-cognitive-impairment-in-patients-poluchennym-ischemic-stroke-in-the-acute-and-early-recovery-periods-in-the-process-of-neuroprotection-low-dose-drug-cortexin
#7
L A Belova, V V Mashin, V V Abramova, A N Proshin, A N Ovsyannikova
AIM: To study the effect of repeated low-dose course of neuroprotection by drug cortexin on cognitive impairment in the acute and early recovery periods of hemispheric ischemic stroke. MATERIAL AND METHODS: The study involved 90 patients with poluchennym ischemic stroke. Patients of the first group received cortexin 20 mg (10+10) intramuscularly on the background of basic therapy, patients of the second group (n=30) received cortexin 20 mg (10+10) two courses for 10 days each with a break in between of 10 days, the patients of the third group - only basic therapy...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27904591/brain-regions-involved-in-swallowing-evidence-from-stroke-patients-in-a-cross-sectional-study
#8
Shiva Ebrahimian Dehaghani, Fariba Yadegari, Ali Asgari, Ahmad Chitsaz, Mehdi Karami
BACKGROUND: Limited data available about the mechanisms of dysphagia and areas involving swallow after brain damage; accordingly it is hard to predict which cases are more likely to develop swallowing dysfunction based on the neuroimaging. The aim of this study was to investigate the relationship between brain lesions and dysphagia in a sample of acute conscious stroke patients. MATERIALS AND METHODS: In a cross-sectional study, 113 acute conscious stroke patients (69 male mean [standard deviation (SD)] age 64...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27899888/neurophysiological-characterization-of-subacute-stroke-patients-a-longitudinal-study
#9
Giuseppe Lamola, Chiara Fanciullacci, Giada Sgherri, Federica Bertolucci, Alessandro Panarese, Silvestro Micera, Bruno Rossi, Carmelo Chisari
Various degrees of neural reorganization may occur in affected and unaffected hemispheres in the early phase after stroke and several months later. Recent literature suggests to apply a stratification based on lesion location and to consider patients with cortico-subcortical and subcortical strokes separately: different lesion location may also influence therapeutic response. In this study we used a longitudinal approach to perform TMS assessment (Motor Evoked Potentials, MEP, and Silent Period, SP) and clinical evaluations (Barthel Index, Fugl-Meyer Assessment for upper limb motor function and Wolf Motor Function Test) in 10 cortical-subcortical and 10 subcortical ischemic stroke patients...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27895298/effect-of-right-insular-involvement-on-death-and-functional-outcome-after-acute-ischemic-stroke-in-the-ist-3-trial-third-international-stroke-trial
#10
Luciano A Sposato, Geoffrey Cohen, Joanna M Wardlaw, Peter Sandercock, Richard I Lindley, Vladimir Hachinski
BACKGROUND AND PURPOSE: In patients with acute ischemic stroke, whether involvement of the insular cortex influences outcome is controversial. Much of the apparent adverse outcome may relate to such strokes usually being severe. We examined the influence of right and left insular involvement on stroke outcomes among patients from the IST-3 study (Third International Stroke Trial) who had visible ischemic stroke on neuroimaging. METHODS: We used multiple logistic regression to compare outcomes of left versus right insular and noninsular strokes across strata of stroke severity, on death, proportion dead or dependent, and level of disability (ordinalized Oxford Handicap Score) at 6 months, with adjustment for the effects of age, lesion size, and presence of atrial fibrillation...
December 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27895105/robot-assisted-mechanical-therapy-attenuates-stroke-induced-limb-skeletal-muscle-injury
#11
Chandan K Sen, Savita Khanna, Hallie Harris, Richard Stewart, Maria Balch, Mallory Heigel, Seth Teplitsky, Surya Gnyawali, Cameron Rink
The efficacy and optimization of poststroke physical therapy paradigms is challenged in part by a lack of objective tools available to researchers for systematic preclinical testing. This work represents a maiden effort to develop a robot-assisted mechanical therapy (RAMT) device to objectively address the significance of mechanical physiotherapy on poststroke outcomes. Wistar rats were subjected to right hemisphere middle-cerebral artery occlusion and reperfusion. After 24 h, rats were split into control (RAMT(-)) or RAMT(+) groups (30 min daily RAMT over the stroke-affected gastrocnemius) and were followed up to poststroke d 14...
November 28, 2016: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/27890765/revascularization-of-moyamoya-angiopathy-in-older-adults
#12
Richard W Williamson, Adib A Abla, Joseph M Zabramski, Peter Nakaji, Robert F Spetzler, John E Wanebo
BACKGROUND: Moyamoya angiopathy most often presents in young people in the second and third decade of life. Although uncommon, it can present later in life. In this report, we present our results with moyamoya patients older than 50 years of age who were treated with surgical revascularization via either direct bypass or indirect bypass (encephaloduroarteriosynangiosis). METHODS: A retrospective review was conducted to identify patients with moyamoya disease who were treated with surgical revascularization at our institution between 2002 and 2015...
November 24, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27885162/contralesional-corticomotor-neurophysiology-in-hemiparetic-children-with-perinatal-stroke-developmental-plasticity-and-clinical-function
#13
Ephrem Zewdie, Omar Damji, Patrick Ciechanski, Trevor Seeger, Adam Kirton
Background Perinatal stroke causes most hemiparetic cerebral palsy. Ipsilateral connections from nonlesioned hemisphere to affected hand are common. The nonlesioned primary motor cortex (M1) determines function and is a potential therapeutic target but its neurophysiology is poorly understood. Objective We aimed to characterize the neurophysiological properties of the nonlesioned M1 in children with perinatal stroke and their relationship to clinical function. Methods Fifty-two participants with hemiparetic cerebral palsy and magnetic resonance imaging-confirmed perinatal stroke and 40 controls aged 8 to 18 years completed the same transcranial magnetic stimulation (TMS) protocol...
November 23, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27884739/structural-and-functional-improvements-due-to-robot-assisted-gait-training-in-the-stroke-injured-brain
#14
Hea Eun Yang, Sunghyon Kyeong, Seung Hwa Lee, Won-Jae Lee, Sang Won Ha, Seung Min Kim, Hyunkoo Kang, Won Min Lee, Chang Soon Kang, Dae Hyun Kim
Robot-assisted gait training (RAGT) can improve walking ability after stroke. Because the underlying mechanisms are still unknown, we analyzed changes in post-stroke injured brains after RAGT. Ten non-ambulatory patients receiving inpatient rehabilitation were examined within 3 months of stroke onset. RAGT consisted of 45minutes of training, 3days per week. We acquired diffusion tensor imaging (DTI) data before and after 20 sessions of RAGT. Fractional anisotropy (FA) maps were then used to determine neural changes after RAGT...
November 21, 2016: Neuroscience Letters
https://www.readbyqxmd.com/read/27876659/surgical-treatment-for-patients-with-moyamoya-syndrome-and-type-1-neurofibromatosis
#15
Jose L Porras, Wuyang Yang, Tomas Garzon-Muvdi, Risheng Xu, Jaishri Blakeley, Allan Belzberg, Justin M Caplan, Syed Khalid, Geoffrey P Colby, Alexander L Coon, Rafael J Tamargo, Edward S Ahn, Judy Huang
INTRODUCTION: The current study describes the impact of surgery in preventing follow-up ipsilateral TIAs/strokes in an East Coast North American cohort of patients with both moyamoya syndrome (MMS) and neurofibromatosis type 1 (NF1) (MMS-NF1). METHODS: We retrospectively reviewed records of patients with MMS and NF1 at the Johns Hopkins Medical Institutions from 1990-2014. Baseline characteristics and follow-up results including subsequent ipsilateral strokes were collected, and compared between a revascularization group (group1) and a conservatively managed group (group2) on a per-hemisphere basis...
November 19, 2016: World Neurosurgery
https://www.readbyqxmd.com/read/27861368/comparison-of-extracranial-artery-stenosis-and-cerebral-blood-flow-assessed-by-quantitative-magnetic-resonance-using-digital-subtraction-angiography-as-the-reference-standard
#16
Jingjing Cai, Dan Wu, Yongqian Mo, Anxin Wang, Shiyu Hu, Lijie Ren
Extracranial arteriosclerosis usually indicates a high risk of ischemic stroke. In the past, a clinical decision following diagnosis was dependent on the percentage of vessel stenosis determined by an invasive technique. We aimed to develop a quantitative magnetic resonance (QMR) technique to evaluate artery structure and cerebral hemodynamics noninvasively.QMR and digital subtraction angiography (DSA) were performed in 67 patients with suspected cerebral vascular disease at our hospital. Accuracy, sensitivity, positive predictive values (PPVs), negative predictive values (NPVs), and Pearson correlation coefficient of QMR were calculated and compared for the detection and measurement of vascular stenoses using DSA as a gold standard...
November 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27859933/spectroscopic-biomarkers-of-motor-cortex-developmental-plasticity-in-hemiparetic-children-after-perinatal-stroke
#17
Helen L Carlson, Frank P MacMaster, Ashley D Harris, Adam Kirton
Perinatal stroke causes hemiparetic cerebral palsy and lifelong motor disability. Bilateral motor cortices are key hubs within the motor network and their neurophysiology determines clinical function. Establishing biomarkers of motor cortex function is imperative for developing and evaluating restorative interventional strategies. Proton magnetic resonance spectroscopy (MRS) quantifies metabolite concentrations indicative of underlying neuronal health and metabolism in vivo. We used functional magnetic resonance imaging (MRI)-guided MRS to investigate motor cortex metabolism in children with perinatal stroke...
November 17, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27859903/corticostriatal-connectivity-fingerprints-probability-maps-based-on-resting-state-functional-connectivity
#18
Ellen Jaspers, Joshua H Balsters, Pegah Kassraian Fard, Dante Mantini, Nicole Wenderoth
Over the last decade, structure-function relationships have begun to encompass networks of brain areas rather than individual structures. For example, corticostriatal circuits have been associated with sensorimotor, limbic, and cognitive information processing, and damage to these circuits has been shown to produce unique behavioral outcomes in Autism, Parkinson's Disease, Schizophrenia and healthy ageing. However, it remains an open question how abnormal or absent connectivity can be detected at the individual level...
November 12, 2016: Human Brain Mapping
https://www.readbyqxmd.com/read/27852529/seasonal-variation-in-cervical-artery-dissection-in-the-hunter-new-england-region-new-south-wales-australia-a-retrospective-cohort-study
#19
Lucy C Thomas, Andrew P Makaroff, Chris Oldmeadow, John R Attia, Christopher R Levi
BACKGROUND: Cervical artery dissection (CAD) is a leading cause of ischemic stroke among middle aged adults, yet the aetiology remains poorly understood. There are reports from colder northern hemisphere sites of a seasonal pattern in the incidence of CAD. Seasonality may suggest some transient putative pro-inflammatory mechanism but it is unknown whether this also exists in temperate climates. AIMS: To investigate the seasonal variation in incidence of CAD in the xx Region, Australia, and to compare seasonal incidence and selected clinical features between cases of carotid and vertebral artery dissection...
October 20, 2016: Manual Therapy
https://www.readbyqxmd.com/read/27847768/the-efficacy-of-single-barrel-superficial-temporal-artery-middle-cerebral-artery-bypass-in-treatment-of-adult-patients-with-ischemic-type-moyamoya-disease
#20
Mahnjeong Ha, Chang Hwa Choi, Jae Il Lee, Seung Heon Cha, Sang Weon Lee, Jun Kyeung Ko
OBJECTIVE: So far, there is no study answering the question of which type of surgical technique is practically the most useful in the treatment of adult patients with ischemic type moyamoya disease (MMD). We evaluated the efficacy of single barrel superficial temporal artery (STA)-middle cerebral artery (MCA) bypass in the treatment of adult patients with ischemic type MMD by retrospectively collecting clinical and radiological data. MATERIALS AND METHODS: A retrospective review identified 31 adult patients who underwent 43 single barrel STA-MCA bypass procedures performed for treatment of ischemic-type MMD between 2006 and 2014...
September 2016: Journal of Cerebrovascular and Endovascular Neurosurgery
keyword
keyword
90647
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"