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thalamic stroke

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https://www.readbyqxmd.com/read/29765301/the-additional-contribution-of-white-matter-hyperintensity-location-to-post-stroke-cognitive-impairment-insights-from-a-multiple-lesion-symptom-mapping-study
#1
Lei Zhao, Adrian Wong, Yishan Luo, Wenyan Liu, Winnie W C Chu, Jill M Abrigo, Ryan K L Lee, Vincent Mok, Lin Shi
White matter hyperintensities (WMH) are common in acute ischemic stroke patients. Although WMH volume has been reported to influence post-stroke cognition, it is still not clear whether WMH location, independent of acute ischemic lesion (AIL) volume and location, contributes to cognitive impairment after stroke. Here, we proposed a multiple-lesion symptom mapping model that considers both the presence of WMH and AIL to measure the additional contribution of WMH locations to post-stroke cognitive impairment...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29737956/connection-disruption-underlying-attention-deficit-in-subcortical-stroke
#2
Jingchun Liu, Caihong Wang, Qingqing Diao, Wen Qin, Jingliang Cheng, Chunshui Yu
Purpose To investigate neural substrates underlying attention deficit in patients with chronic subcortical stroke by combining voxel-based lesion-symptom mapping (VLSM) and diffusion-tensor (DT) tractography. Materials and Methods Institutional review board approval and written informed consent were obtained. Diffusion magnetic resonance imaging data were prospectively acquired from August 1, 2014, to March 30, 2015, in 49 patients (32 men, 17 women; mean age, 55.7 years ± 8.0; age range, 40-71 years) with subcortical infarctions in the basal ganglia and neighboring regions and 52 control subjects (30 men, 22 women; mean age, 54...
May 8, 2018: Radiology
https://www.readbyqxmd.com/read/29626028/lesson-of-the-month-2-a-rare-presentation-of-stroke-diagnosis-made-on-magnetic-resonance-imaging
#3
Danielle Berenson, Luke Nuttall, Eluzai Hakim, Khaled Abdel-Aziz
Bilateral thalamic infarcts are uncommon posterior circulation strokes. The artery of Percheron (AOP) is a rare anatomical variant involving a singular arterial supply to both thalami and occlusion leads to bilateral thalamic infarction.We report the case of a 71-year-old man who presented with decreased consciousness (fluctuating Glasgow Coma Scale score of 5-7). He had a background of atrial fibrillation and was anticoagulated with dabigatran, a novel oral anticoagulant. Computed tomography (CT) scan showed a mildly reduced attenuation in the region of the left thamalus...
March 2018: Clinical Medicine: Journal of the Royal College of Physicians of London
https://www.readbyqxmd.com/read/29624118/ephrinb2-activation-enhances-angiogenesis-reduces-amyloid-%C3%AE-deposits-and-secondary-damage-in-thalamus-at-the-early-stage-after-cortical-infarction-in-hypertensive-rats
#4
Shihui Xing, Nannan Pan, Wei Xu, Jian Zhang, Jingjing Li, Chao Dang, Gang Liu, Zhong Pei, Jinsheng Zeng
Cerebral infarction causes secondary neurodegeneration and angiogenesis in thalamus, which impacts functional recovery after stroke. Here, we hypothesize that activation of ephrinB2 could stimulate angiogenesis and restore the secondary neurodegeneration in thalamus after cerebral infarction. Focal cerebral infarction was induced by middle cerebral artery occlusion (MCAO). Secondary damage, angiogenesis, amyloid-β (Aβ) deposits, levels of ephrinB2 and receptor for advanced glycation end product (RAGE) in the ipsilateral thalamus were determined by immunofluorescence and immunoblot...
January 1, 2018: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/29593921/unilateral-asterixis-in-arm-and-leg-caused-by-internal-capsula-stroke
#5
Katharina Feil, Marion Huber, Nicolina Goldschagg, Lars Kellert
We report an unusual clinical manifestation of ischemic stroke with acute right-sided asterixis affecting the arm as well as the leg due to a lesion in the left posterior limb of the internal capsula. After treatment with intravenous thrombolysis the patient made a good recovery. Notably, in this case unilateral asterixis affected the arm as well as the leg, resulting in postural and gait instability. In addition, damage in the basal ganglia-thalamo-cortical network, as in our patient, has to be distinguished from other supratentorial causes of acute asterixis like thalamic or frontal lobe lesions linked to the cerebello-brainstem-thalamo-frontal lobe circuits...
2018: Case Reports in Neurological Medicine
https://www.readbyqxmd.com/read/29592977/artery-of-percheron-an-unusual-stroke-presentation
#6
Toby Pitts-Tucker, Jeremy Small
An 86-year-old woman was admitted with multiple episodes of transient loss of consciousness. She was initially treated for seizures, and stroke was not considered likely. MRI on the same day of admission showed acute bilateral medial thalamic infarcts in keeping with the Artery of Percheron (AOP) territory infarcts. Investigation for polycythaemia and thrombocytosis showed JAK2 positive myeloproliferative neoplasm.A diagnosis of AOP infarction is often missed or delayed because it is rare and presents with variable neurological symptoms...
March 28, 2018: BMJ Case Reports
https://www.readbyqxmd.com/read/29570507/how-central-is-central-post-stroke-pain-the-role-of-afferent-input-in-post-stroke-neuropathic-pain-a-prospective-open-label-pilot-study
#7
Simon Haroutounian, Andria L Ford, Karen Frey, Lone Nikolajsen, Nanna B Finnerup, Alicia Neiner, Evan D Kharasch, Pall Karlsson, Michael M Bottros
Central post-stroke pain is a neuropathic pain disorder, the underlying mechanisms of which are not well understood. It has been suggested that stroke-associated loss of inhibitory neurons in the spinothalamic tract causes disinhibition of thalamic neurons, which autonomously generate ectopic nociceptive action potentials responsible for the pain experience. We hypothesized that central post-stroke pain is a result of misinterpretation of afferent sensory input by the sensitized neurons within the brain, rather than generated spontaneously by the damaged CNS neurons...
March 21, 2018: Pain
https://www.readbyqxmd.com/read/29569571/a-foldable-electrode-array-for-3d-recording-of-deep-seated-abnormal-brain-cavities
#8
Dries Kil, Philippe De Vloo, Guy Fierens, Frederik Ceyssens, Borbála Hunyadi, Alexander Bertrand, Bart Nuttin, Robert Puers
This study describes the design and microfabrication of a foldable thin-film neural implant and investigates its suitability for electrical recording of deep-lying brain cavity walls. 
 Approach. A new type of foldable neural electrode array is presented, which can be inserted through a cannula. The microfabricated electrode is specifically designed for electrical recording of the cavity wall of thalamic lesions resulting from stroke. The proof-of-concept is demonstrated by measurements in rat brain cavities...
March 23, 2018: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29557687/passive-accessory-joint-mobilization-in-the-multimodal-management-of-chronic-dysesthesia-following-thalamic-stroke
#9
Kristina Griffin, Michael O'Hearn, Carla C Franck, Carol A Courtney
STUDY DESIGN: Case Report. PURPOSE: Stroke is the most common cause of long-term disability. Dysesthesia, an unpleasant sensory disturbance, is common following thalamic stroke and evidence-based interventions for this impairment are limited. The purpose of this case report was to describe a decrease in dysesthesia following manual therapy intervention in a patient with history of right lacunar thalamic stroke. CASE DESCRIPTION: A 66-year-old female presented with tingling and dysesthesia in left hemisensory distribution including left trunk and upper/lower extremities, limiting function...
March 20, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29549469/why-acute-unilateral-vestibular-midbrain-lesions-rarely-manifest-with-rotational-vertigo-a-clinical-and-modelling-approach-to-head-direction-cell-function
#10
Marianne Dieterich, Stefan Glasauer, Thomas Brandt
A retrospective clinical study focused on the frequency of rotational vertigo in 63 patients with acute unilateral midbrain strokes involving the vestibular and ocular motor systems. In contrast to unilateral pontomedullary brainstem lesions, rotational vertigo in midbrain lesions occurred with a low frequency (14%) and transient (< 1 day) course. Swaying vertigo or unspecific dizziness (22%) and postural imbalance (31%) were more frequent. Midbrain strokes with transient rotational vertigo manifested with lesions chiefly in the caudal midbrain tegmentum, while manifestations with swaying, unspecific, or no vertigo chiefly occurred in rostral mesencephalic or meso-diencephalic lesions...
May 2018: Journal of Neurology
https://www.readbyqxmd.com/read/29525809/proliferation-of-bilateral-nerve-fibers-following-thalamic-infarction-contributes-to-neurological-function-recovery-a-diffusion-tensor-imaging-dti-study
#11
Yayuan Liu, Li Chen, Jinseng Zeng, Wenmei Li, Sudan Zeng, Bin Ye, Zhijian Liang
BACKGROUND The aim of this study was to investigate the reorganization in ipsilesional and contralesional thalamic radiation fibers after unilateral focal thalamic stroke in sensory disturbance patients. MATERIAL AND METHODS We recruited 12 patients with acute unilateral thalamic infarction and sensory disturbance and 12 healthy age- and sex-matched controls. All patients underwent diffusion tensor imaging (DTI) and were assessed with National Institutes of Health stroke scale (NIHSS), Barthel index (BI), and paragraph 8 of NIHSS (NIHSS8) at 1 week (W1), 4 weeks (W4), 3 months (M3), and 6 months (M6) after thalamic infraction...
March 11, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29523650/thalamic-diaschisis-in-acute-ischemic-stroke-occurrence-perfusion-characteristics-and-impact-on-outcome
#12
Paul Reidler, Kolja M Thierfelder, Matthias P Fabritius, Wieland H Sommer, Felix G Meinel, Franziska Dorn, Frank A Wollenweber, Marco Duering, Wolfgang G Kunz
BACKGROUND AND PURPOSE: Ipsilateral thalamic diaschisis (ITD) describes the reduction of thalamic function, metabolism, and perfusion resulting from a distant lesion of the ipsilateral hemisphere. Our aim was to evaluate the perfusion characteristics and clinical impact of ITD in acute middle cerebral artery stroke, which does not directly affect the thalamus. METHODS: One hundred twenty-four patients with middle cerebral artery infarction were selected from a prospectively acquired cohort of 1644 patients who underwent multiparametric computed tomography (CT), including CT perfusion for suspected stroke...
April 2018: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/29492272/mirror-therapy-for-an-adult-with-central-post-stroke-pain-a-case-report
#13
Davide Corbetta, Elisabetta Sarasso, Federica Agosta, Massimo Filippi, Roberto Gatti
Background: Treatment of central post-stroke pain (CPSP) after a thalamic-capsular stroke is generally based on pharmacological approach as it is low responsive to physiotherapy. In this case report, the use of mirror therapy (MT) for the reduction of CPSP in a subject after a stroke involving thalamus is presented. Case presentation: Five years after a right lenticular-capsular thalamic stroke, despite a good recovery of voluntary movement that guaranteed independence in daily life activities, a 50-year-old woman presented with mild weakness and spasticity, an important sensory loss and a burning pain in the left upper limb...
2018: Archives of physiotherapy
https://www.readbyqxmd.com/read/29460331/clinical-and-neuroimaging-findings-in-thalamic-territory-infarctions-a-review
#14
REVIEW
Shuo Li, Yogesh Kumar, Nishant Gupta, Ahmed Abdelbaki, Harpreet Sahwney, Anil Kumar, Manisha Mangla, Rajiv Mangla
The thalamus is a part of the diencephalon, containing numerous connections between the forebrain and subcortical structures. It serves an important function as a relay center between the cerebral cortex and the subcortical regions, particularly with sensory information. The thalamus also plays a major role in regulating arousal and the levels of awareness. Distinct vascular distribution of the thalamus give rises to different syndromic presentation of thalamic nuclei infarcts. The clinical records and available imaging studies of patients with confirmed thalamic territory infarcts on magnetic resonance imaging (MRI) at the University Hospital of Rochester were reviewed and analyzed...
February 20, 2018: Journal of Neuroimaging: Official Journal of the American Society of Neuroimaging
https://www.readbyqxmd.com/read/29427459/acute-amnestic-syndrome-in-isolated-bilateral-fornix-stroke
#15
A Salvalaggio, A Cagnin, L Nardetto, R Manara, C Briani
BACKGROUND AND PURPOSE: Acute onset of amnestic syndrome may represent a challenging diagnostic issue. In addition to non-vascular etiology, thalamic strokes or infarction involving several temporal lobe structures have been reported. METHODS: We describe three patients in whom an isolated bilateral anterior fornix infarction presented with an acute amnestic syndrome. Clinical presentation, differential diagnosis and magnetic resonance images are discussed for each patient and vascular anatomy of the involved brain regions is also considered...
May 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29425940/rehabilitation-course-and-specification-of-dysmetria-of-a-patient-with-ataxia-dysmetria-and-hemiparesis-after-a-stroke-in-the-corona-radiata-a-case-presentation
#16
Monir Mohar, Kosandra Hartman, Bronwyn Long, Peter Lee, Adrian Didita, Eric L Altschuler
We present a case of a patient with ataxia, dysmetria, and hemiparesis after a stroke in the corona radiata. The patient had an excellent clinical course with near resolution of symptoms in 2 and a half weeks and returned and back to work full duty and full time a couple of weeks later. We use a video of several neurologic tests to demonstrate and characterize the dysmetria. Interestingly, a key characteristic of the dysmetria appears to be different from that seen in patients with dysmetria arising from a cerebellar, thalamic, or pontine lesion...
February 6, 2018: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/29389773/metabolic-changes-in-central-poststroke-pain-following-thalamic-intracerebral-hemorrhage-an-18f-fdg-pet-study
#17
Na Young Kim, Sang Chul Lee, Young-Sil An, Ji-Cheol Shin, Yong Wook Kim
PURPOSE: Central poststroke pain (CPSP) is one of the most refractory neuropathic pains following stroke. Injury in the spinothalamic pathway appears crucial for the development of CPSP, but changes in activity in multiple brain regions may also be related. We investigated brain metabolic changes in patients with CPSP following thalamic intracerebral hemorrhage (ICH). METHODS: Forty-three patients with thalamic ICH were examined. Overall brain metabolism was measured with F-FDG PET...
March 2018: Clinical Nuclear Medicine
https://www.readbyqxmd.com/read/29371733/artery-of-percheron-infarct-a-diagnostic-and-prognostic-conundrum
#18
Aun Raza Shah, Rubab Ali
A 39 year old male was found unconscious at home. On arrival to the hospital the patient was profoundly somnolent but easily rousable, with no focal neurological deficits. Imaging confirmed bilateral thalamic infarcts from the occlusion of Artery of Percheron, a rare anatomic variant which is a single arterial trunk supplying the thalamus and midbrain bilaterally. Anti-platelet therapy was initiated as soon as the diagnosis was established and the patient showed a rapid remarkable recovery over the next 48 hours...
January 2018: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/29249682/deep-brain-stimulation-for-lesion-related-tremors-a-systematic-review-and-meta-analysis
#19
REVIEW
Marcelo D Mendonça, Bruna Meira, Marco Fernandes, Raquel Barbosa, Paulo Bugalho
Deep brain stimulation (DBS) is an effective treatment for essential tremor or tremor in Parkinson's disease. The effectiveness of DBS in reducing tremors that develop after a structural lesion of the central nervous system (such as Holmes' tremor - HT) has only been addressed in case reports or series. We conducted a systematic review of all published original reports of DBS in central nervous system lesion-related tremor (excluding demyelinating disorders due to their non-static nature). Where available, we extracted data regarding each patient's demographic, tremor and surgical details...
February 2018: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/29247238/trpv1-mediated-pharmacological-hypothermia-promotes-improved-functional-recovery-following-ischemic-stroke
#20
Zhijuan Cao, Adithya Balasubramanian, Steen E Pedersen, Jonathan Romero, Robia G Pautler, Sean P Marrelli
Hypothermia shows promise for stroke neuroprotection, but current cooling strategies cause undesirable side effects that limit their clinical applications. Increasing efforts have focused on pharmacological hypothermia as a treatment option for stroke. Previously, we showed that activation of a thermoregulatory ion channel, transient receptor potential vanilloid 1 (TRPV1), by dihydrocapsaicin (DHC) produces reliable hypothermia. In this study, we investigate the effects of TRPV1-mediated hypothermia by DHC on long-term ischemic stroke injury and functional outcome...
December 15, 2017: Scientific Reports
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