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Deep medullary vein engorgement and superficial medullary vein engorgement: two patterns of perinatal venous stroke. Pediatr Radiol 2021; 51:675-685. [PMID: 33090246 DOI: 10.1007/s00247-020-04846-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2020] [Revised: 08/08/2020] [Accepted: 09/08/2020] [Indexed: 12/11/2022]
Abstract
Perinatal venous stroke has classically been attributed to cerebral sinovenous thrombosis with resultant congestion or thrombosis of the small veins draining the cerebrum. Advances in brain MRI, in particular susceptibility-weighted imaging, have enabled the visualization of the engorged small intracerebral veins, and the spectrum of perinatal venous stroke has expanded to include isolated congestion or thrombosis of the deep medullary veins and the superficial intracerebral veins. Congestion or thrombosis of the deep medullary veins or the superficial intracerebral veins can result in vasogenic edema, cytotoxic edema or hemorrhage in the territory of disrupted venous flow. Deep medullary vein engorgement and superficial medullary vein engorgement have characteristic findings on MRI and should be differentiated from neonatal hemorrhagic stroke.
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52
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Chang CY, Pan PH, Li JR, Ou YC, Liao SL, Chen WY, Kuan YH, Chen CJ. Glycerol Improves Intracerebral Hemorrhagic Brain Injury and Associated Kidney Dysfunction in Rats. Antioxidants (Basel) 2021; 10:antiox10040623. [PMID: 33921791 PMCID: PMC8073011 DOI: 10.3390/antiox10040623] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/13/2021] [Accepted: 04/17/2021] [Indexed: 12/11/2022] Open
Abstract
In stroke patients, the development of acute kidney injury (AKI) is closely linked with worse outcomes and increased mortality. In this study, the interplay between post-stroke and AKI and treatment options was investigated in a rodent model of hemorrhagic stroke. Intrastriatal collagenase injection for 24 h caused neurological deficits, hematoma formation, brain edema, apoptosis, blood–brain barrier disruption, oxidative stress, and neuroinflammation in Sprague Dawley rats. Elevation of serum blood urea nitrogen, serum creatinine, urine cytokine-induced neutrophil chemoattractant-1, and urine Malondialdehyde, as well as moderate histological abnormality in the kidney near the glomerulus, indicated evidence of kidney dysfunction. The accumulation of podocalyxin DNA in urine further suggested a detachment of podocytes and structural deterioration of the glomerulus. Circulating levels of stress hormones, such as epinephrine, norepinephrine, corticosterone, and angiotensin II were elevated in rats with intracerebral hemorrhage. Osmotic agent glycerol held promising effects in alleviating post-stroke brain injury and kidney dysfunction. Although the detailed protective mechanisms of glycerol have yet to be determined, the intrastriatal collagenase injection hemorrhagic stroke model in rats allowed us to demonstrate the functional and structural integrity of glomerulus are targets that are vulnerable to post-stroke injury and stress hormones could be surrogates of remote communications.
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Affiliation(s)
- Cheng-Yi Chang
- Department of Surgery, Feng Yuan Hospital, Taichung City 420, Taiwan;
- Department of Veterinary Medicine, National Chung Hsing University, Taichung City 402, Taiwan; (P.-H.P.); (W.-Y.C.)
| | - Ping-Ho Pan
- Department of Veterinary Medicine, National Chung Hsing University, Taichung City 402, Taiwan; (P.-H.P.); (W.-Y.C.)
- Department of Pediatrics, Tungs’ Taichung Metro Harbor Hospital, Taichung City 435, Taiwan
| | - Jian-Ri Li
- Division of Urology, Taichung Veterans General Hospital, Taichung City 407, Taiwan;
- Department of Nursing, HungKuang University, Taichung City 433, Taiwan
| | - Yen-Chuan Ou
- Department of Urology, Tungs’ Taichung Metro Harbor Hospital, Taichung City 435, Taiwan;
| | - Su-Lan Liao
- Department of Medical Research, Taichung Veterans General Hospital, Taichung City 407, Taiwan;
| | - Wen-Ying Chen
- Department of Veterinary Medicine, National Chung Hsing University, Taichung City 402, Taiwan; (P.-H.P.); (W.-Y.C.)
| | - Yu-Hsiang Kuan
- Department of Pharmacology, Chung Shan Medical University, Taichung City 402, Taiwan;
| | - Chun-Jung Chen
- Department of Medical Research, Taichung Veterans General Hospital, Taichung City 407, Taiwan;
- Department of Medical Laboratory Science and Biotechnology, China Medical University, Taichung City 404, Taiwan
- Correspondence: ; Tel.: +886-4-23592525 (ext. 4022)
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53
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Çaksen H, Köseoğlu FT, Güven AS, Altunhan H, İyisoy MS, Açıkgözoğlu S. Risk and Prognostic Factors in Perinatal Hemorrhagic Stroke. Ann Indian Acad Neurol 2021; 24:227-233. [PMID: 34220067 PMCID: PMC8232468 DOI: 10.4103/aian.aian_580_20] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2020] [Revised: 07/02/2020] [Accepted: 08/02/2020] [Indexed: 11/30/2022] Open
Abstract
Background: Perinatal stroke encompasses a heterogeneous group of focal neurological injuries early in brain development. In this study, we aimed to compare risk and prognostic factors in preterm and term infants with perinatal hemorrhagic stroke (PHS). Patients and Methods: The study includes 66 infants with PHS. The infants were evaluated for demographic characteristics, fetal and maternal risk factors, perinatal events, clinical and neuroimaging findings, complications, and sequales. Results: Of 66 infants with PHS, 44 (66.70%) were preterm and 22 (33.30%) were term infants. Primiparity, mucosal bleeding, and multiple lobes involvement were more common in term infants than preterm infants (P < 0.05); however, respiratory insufficiency, neonatal sepsis, perinatal asphyxia, respiratory distress syndrome, use of invasive mechanical ventilation, use of noninvasive mechanical ventilation, and prolonged hospitalization were more common in preterm infants than term infants (P < 0.05). Eight (12.12%) infants died during infancy period. Small for gestational age and mucosal bleeding were more common in infants who are dead than those alive (P < 0.05). Forty-two (63.63%) infants were followed. Cerebral palsy and/or epilepsy and/or hydrocephalus were diagnosed in 36 (85.72%) infants during follow-up. Conclusion: Our findings showed that PHS was much more common in preterm infants. Mucosal bleeding and multiple lobes involvement were more common in term infants. PHS has high morbidity and mortality rates. Small for gestational age and mucosal bleeding were more common in infants who are dead.
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Affiliation(s)
- Hüseyin Çaksen
- Department of Pediatrics, Division of Pediatric Neurology, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
| | - Fatma Tuba Köseoğlu
- Department of Pediatrics, Division of Pediatric Neurology, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
| | - Ahmet Sami Güven
- Department of Pediatrics, Division of Pediatric Neurology, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
| | - Hüseyin Altunhan
- Department of Pediatrics, Division of Neonatology, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
| | - Mehmet Sinan İyisoy
- Department of Medical Education, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
| | - Saim Açıkgözoğlu
- Department of Radiology, Necmettin Erbakan University, Meram Medical Faculty, Meram, Konya, Turkey
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Srivastava R, Kirton A. Perinatal Stroke: A Practical Approach to Diagnosis and Management. Neoreviews 2021; 22:e163-e176. [PMID: 33649089 DOI: 10.1542/neo.22-3-e163] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Perinatal stroke is a focal vascular brain injury that occurs from the fetal period to 28 days of postnatal age. With an overall incidence of up to 1 in 1,000 live births, the most focused lifetime risk for stroke occurs near birth. Perinatal stroke can be classified by the timing of diagnosis, vessel involvement, and type of injury. Timing of diagnosis may be in the acute neonatal period or retrospectively after a period of normal development, followed by abnormal neurologic findings, with the injury presumed to have occurred around the time of birth. Strokes may be arterial or venous, ischemic, and/or hemorrhagic. Within these classifications, 6 perinatal stroke diseases are recognizable, based on clinical and radiographic features. Morbidity is high in perinatal stroke, because it accounts for most cases of hemiparetic cerebral palsy, with disability lasting a lifetime. Additional complications include disorders of sensation and vision, language delays, cognitive and learning deficits, epilepsy, and mental health consequences that affect the entire family. Advances in neonatal neurocritical care may afford opportunity to minimize brain injury and improve outcomes. In the chronic timeframe, progress made in neuroimaging and brain mapping is revealing the developmental plasticity that occurs, informing new avenues for neurorehabilitation. This review will summarize the diagnosis and management of each perinatal stroke disease, highlighting their similarities and distinctions and emphasizing a patient- and family-centered approach to management.
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Affiliation(s)
- Ratika Srivastava
- Department of Community Health Sciences.,Department of Pediatrics, Section of Neurology; and.,Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada
| | - Adam Kirton
- Department of Pediatrics, Section of Neurology; and.,Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada
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Hausman-Kedem M, Malinger G, Modai S, Kushner SA, Shiran SI, Ben-Sira L, Roth J, Constantini S, Fattal-Valevski A, Ben-Shachar S. Monogenic Causes of Apparently Idiopathic Perinatal Intracranial Hemorrhage. Ann Neurol 2021; 89:813-822. [PMID: 33527515 DOI: 10.1002/ana.26033] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/26/2021] [Accepted: 01/26/2021] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Perinatal intracranial hemorrhage (pICH) is a rare event that occurs during the fetal/neonatal period with potentially devastating neurological outcome. However, the etiology of pICH is frequently hard to depict. We investigated the role of rare genetic variations in unexplained cases of pICH. METHODS We performed whole-exome sequencing (WES) in fetuses and term neonates with otherwise unexplained pICH and their parents. Variant causality was determined according to the American College of Medical Genetics and Genomics (ACMG) criteria, consistency between suggested genes and phenotypes, and mode of inheritance. RESULTS Twenty-six probands (25 families) were included in the study (9 with a prenatal diagnosis and 17 with a postnatal diagnosis). Intraventricular hemorrhage (IVH) was the most common type of hemorrhage (n = 16, 62%), followed by subpial (n = 4, 15%), subdural (n = 4, 15%), and parenchymal (n = 2, 8%) hemorrhage. Causative/likely causative variants were found in 4 subjects from 3 of the 25 families (12%) involving genes related to the brain microenvironment (COL4A1, COL4A2, and TREX-1). Additionally, potentially causative variants were detected in genes related to coagulation (GP1BA, F11, Von Willebrand factor [VWF], FGA, and F7; n = 4, 16%). A potential candidate gene for phenotypic expansion related to microtubular function (DNAH5) was identified in 1 case (4%). Fifty-five percent of the variants were inherited from an asymptomatic parent. Overall, these findings showed a monogenic cause for pICH in 12% to 32% of the families. INTERPRETATION Our findings reveal a clinically significant diagnostic yield of WES in apparently idiopathic pICH and support the use of WES in the evaluation of these cases. ANN NEUROL 2021;89:813-822.
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Affiliation(s)
- Moran Hausman-Kedem
- Pediatric Neurology Institute, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Gustavo Malinger
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Division of Obstetrics and Gynecology Ultrasound, Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | | | - Steven A Kushner
- Department of Psychiatry, Erasmus MC University Medical Center, Rotterdam, The Netherlands
| | - Shelly I Shiran
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Radiology Department, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Liat Ben-Sira
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Radiology Department, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Jonathan Roth
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Neurosurgery Department, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Shlomi Constantini
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Pediatric Neurosurgery Department, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Aviva Fattal-Valevski
- Pediatric Neurology Institute, Dana-Dwek Children's Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Shay Ben-Shachar
- Sackler Faulty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Schneider Children's Medical Center, Petah Tikva, Israel.,Clalit Research Institute, Ramat Gan, Israel
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56
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Berrigan P, Hodge J, Kirton A, Moretti ME, Ungar WJ, Zwicker JD. Protocol for a cost-utility analysis of neurostimulation and intensive camp-based therapy for children with perinatal stroke and hemiparesis based on a multicentre clinical trial. BMJ Open 2021; 11:e041444. [PMID: 33468454 PMCID: PMC7817786 DOI: 10.1136/bmjopen-2020-041444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
INTRODUCTION Perinatal stroke leads to cerebral palsy (CP) and lifelong disability for thousands of Canadian children. Hemiparesis, referring to impaired functionality in one side of the body, is a common complication of perinatal stroke. Standard long-term care for hemiparetic CP focuses on rehabilitation therapies. Early research suggests that patients with hemiparesis may benefit from adjunctive neuromodulation treatments such as transcranial direct current stimulation (tDCS). tDCS uses electric current to stimulate targeted areas of the brain non-invasively, potentially enhancing the effects of motor learning therapies. This protocol describes an economic evaluation to be conducted alongside a randomised controlled trial (RCT) to assess the incremental cost of tDCS added to a camp-based therapy compared with camp-based therapy alone per quality-adjusted life year (QALY) gained in children with hemiparetic CP. METHODS AND ANALYSIS The Stimulation for Perinatal Stroke Optimising Recovery Trajectories (SPORT) trial is a multicentre RCT evaluating tDCS added to a 2-week camp-based therapy for children aged 6-18 years with perinatal ischaemic stroke and disabling hemiparetic CP affecting the upper limb. Outcomes are assessed at baseline, 1 week, 2 months and 6 months following intervention. Cost and quality of life data are collected at baseline and 6 months and results will be used to conduct a cost-utility analysis (CUA). The evaluation will be conducted from the perspectives of the public healthcare system and society. The CUA will be conducted over a 6-month time horizon. ETHICS AND DISSEMINATION Ethical approval for the SPORT trial and the associated economic evaluation has been given by the research ethics boards at each of the study sites. The findings of the economic evaluation will be submitted for publication in a peer reviewed academic journal and submitted for presentation at conference. TRIAL REGISTRATION NUMBER NCT03216837; Post-results.
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Affiliation(s)
- Patrick Berrigan
- School of Public Policy, University of Calgary, Calgary, Alberta, Canada
| | - Jacquie Hodge
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Adam Kirton
- Departments of Pediatrics and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
| | - Myla E Moretti
- Ontario Child Health Support Unit and the Clinical Trials Unit, Hospital for Sick Children, Toronto, Ontario, Canada
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
| | - Wendy J Ungar
- Institute of Health Policy, Management and Evaluation, University of Toronto, Toronto, Ontario, Canada
- Technology Assessment at SickKids, Program of Child Heath Evaluative Sciences, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jennifer D Zwicker
- School of Public Policy, University of Calgary, Calgary, Alberta, Canada
- Alberta Children's Hospital Research Institute, University of Calgary, Calgary, Alberta, Canada
- Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada
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57
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Azeem A, Kirton A, Appendino JP, Kozlik S, Mineyko A. Automated quantification of spike-wave activity may be used to predict the development of electrical status epilepticus in sleep (ESES) in children with perinatal stroke. Clin Neurophysiol 2020; 132:146-153. [PMID: 33278667 DOI: 10.1016/j.clinph.2020.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Revised: 10/30/2020] [Accepted: 11/06/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVE Continuous spike and wave in slow-wave sleep (CSWS), an epileptic encephalopathy, occurs after perinatal stroke where it is associated with cognitive decline. CSWS features a distinct EEG pattern, electrical status epilepticus in sleep (ESES). Biomarkers for the prediction of ESES have not been identified but will facilitate earlier diagnosis and treatment. We hypothesized that spike-frequency and differences in power spectra would be predictive of subsequent ESES. METHODS A cross-sectional study comparing EEG spike-frequency and Power before the development of ESES in patients with perinatal stroke, patients with focal epilepsy, and appropriate controls. RESULTS 43 patients met the inclusion criteria; 11 stroke-ESES, 10 stroke controls, 14 epilepsy-ESES, 8 epilepsy controls. ESES patients had higher pre-diagnosis mean spike-frequency (24.0 ± 24 versus 6.6 ± 9.1 SW/min, p = 0.002) than patients that did not develop ESES; these differences present ~ 3 years before ESES diagnosis. Pre-diagnosis, normalized delta power (1-4 Hz) was higher in the stroke-ESES group (105.7 ± 58 dB/Hz) compared to stroke controls (57.4 ± 45 dB/Hz, p = 0.036). CONCLUSION Spike-frequency and delta power may represent EEG biomarkers of the risk of developing ESES in children with perinatal stroke. SIGNIFICANCE EEG biomarkers may be used by clinicians to assess which patients are more at-risk for ESES. Using spike-frequency, clinicians may be able to identify patients at risk of developing ESES.
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Affiliation(s)
- Abdullah Azeem
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada
| | - Adam Kirton
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Department of Pediatrics, Section of Neurology, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Alberta Children's Hospital, Calgary AB T3B 6A8, Canada
| | - Juan Pablo Appendino
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Department of Pediatrics, Section of Neurology, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Alberta Children's Hospital, Calgary AB T3B 6A8, Canada
| | - Silvia Kozlik
- Alberta Children's Hospital, Calgary AB T3B 6A8, Canada
| | - Aleksandra Mineyko
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Department of Pediatrics, Section of Neurology, Cumming School of Medicine, University of Calgary, Calgary AB T2N 1N4, Canada; Alberta Children's Hospital, Calgary AB T3B 6A8, Canada.
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58
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Carlson HL, Craig BT, Hilderley AJ, Hodge J, Rajashekar D, Mouches P, Forkert ND, Kirton A. Structural and functional connectivity of motor circuits after perinatal stroke: A machine learning study. Neuroimage Clin 2020; 28:102508. [PMID: 33395997 PMCID: PMC7704459 DOI: 10.1016/j.nicl.2020.102508] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 10/19/2020] [Accepted: 11/15/2020] [Indexed: 11/15/2022]
Abstract
Developmental neuroplasticity allows young brains to adapt via experiences early in life and also to compensate after injury. Why certain individuals are more adaptable remains underexplored. Perinatal stroke is an ideal human model of neuroplasticity with focal lesions acquired near birth in a healthy brain. Machine learning can identify complex patterns in multi-dimensional datasets. We used machine learning to identify structural and functional connectivity biomarkers most predictive of motor function. Forty-nine children with perinatal stroke and 27 controls were studied. Functional connectivity was quantified by fluctuations in blood oxygen-level dependent (BOLD) signal between regions. White matter tractography of corticospinal tracts quantified structural connectivity. Motor function was assessed using validated bimanual and unimanual tests. RELIEFF feature selection and random forest regression models identified predictors of each motor outcome using neuroimaging and demographic features. Unilateral motor outcomes were predicted with highest accuracy (8/54 features r = 0.58, 11/54 features, r = 0.34) but bimanual function required more features (51/54 features, r = 0.38). Connectivity of both hemispheres had important roles as did cortical and subcortical regions. Lesion size, age at scan, and type of stroke were predictive but not highly ranked. Machine learning regression models may represent a powerful tool in identifying neuroimaging biomarkers associated with clinical motor function in perinatal stroke and may inform personalized targets for neuromodulation.
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Affiliation(s)
- Helen L Carlson
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
| | - Brandon T Craig
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Alicia J Hilderley
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Jacquie Hodge
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada
| | - Deepthi Rajashekar
- Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Radiology, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Pauline Mouches
- Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Radiology, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Nils D Forkert
- Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Radiology, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada; Department of Radiology, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada
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Assis Z, Kirton A, Pauranik A, Sherriff M, Wei XC. Idiopathic Neonatal Subpial Hemorrhage with Underlying Cerebral Infarct: Imaging Features and Clinical Outcome. AJNR Am J Neuroradiol 2020; 42:185-193. [PMID: 33214181 DOI: 10.3174/ajnr.a6872] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 08/19/2020] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Neonatal subpial hemorrhage with underlying cerebral infarct is a previously described but poorly understood clinicoradiographic syndrome. We sought to further characterize the cranial ultrasound and MR imaging characteristics and associated outcomes of this condition across the full range of gestational ages, including extreme and very preterm neonates. MATERIALS AND METHODS This was a single tertiary pediatric center retrospective case series. Brain MR imaging and cranial ultrasound of neonates with subpial hemorrhage with underlying cerebral infarct were identified from a population-based radiology registry (2006-2020). Original images were reviewed by 2 neuroradiologists blinded to history and outcome. Clinical presentation, course, and outcome at >12 months were abstracted from medical records. The diagnostic utility of cranial ultrasound was compared with that of MR imaging. RESULTS Sixteen patients were included (median gestational age, 36.5 weeks; range, 27-41 weeks; 31% premature). MR images were obtained acutely at the time of presentation between days 0 and 9 of life. On T2WI and DWI, a consistent presence of a hypointense subpial bleed and an underlying hyperintense cerebral cortex were recognized, which created a distinct MR imaging pattern resembling the yin-yang symbol. Findings of all the MRAs and MRVs were normal. Cranial ultrasound detected 6 of 7 MR imaging lesions with sonographic features correlating well with MR imaging. The 3 extreme or very preterm neonates did not survive. The remainder survived with relatively mild neurologic deficits. CONCLUSIONS Subpial hemorrhage with underlying infarction is a recognizable condition with unique MR imaging and sonographic features. Improved recognition may advance understanding of risk factors and outcomes.
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Affiliation(s)
- Z Assis
- From the Departments of Radiology (Z.A., A.K., A.P., X.-C.W.).,Department of Diagnostic Imaging (Z.A., A.P., M.S., X.-C.W.), Alberta Children's Hospital, Calgary, Alberta, Canada
| | - A Kirton
- From the Departments of Radiology (Z.A., A.K., A.P., X.-C.W.).,Clinical Neurosciences and Pediatrics (A.K.), University of Calgary, Calgary, Alberta, Canada
| | - A Pauranik
- From the Departments of Radiology (Z.A., A.K., A.P., X.-C.W.).,Department of Diagnostic Imaging (Z.A., A.P., M.S., X.-C.W.), Alberta Children's Hospital, Calgary, Alberta, Canada
| | - M Sherriff
- Department of Diagnostic Imaging (Z.A., A.P., M.S., X.-C.W.), Alberta Children's Hospital, Calgary, Alberta, Canada
| | - X-C Wei
- From the Departments of Radiology (Z.A., A.K., A.P., X.-C.W.) .,Department of Diagnostic Imaging (Z.A., A.P., M.S., X.-C.W.), Alberta Children's Hospital, Calgary, Alberta, Canada
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60
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Craig BT, Hilderley A, Kinney-Lang E, Long X, Carlson HL, Kirton A. Developmental neuroplasticity of the white matter connectome in children with perinatal stroke. Neurology 2020; 95:e2476-e2486. [PMID: 32887781 PMCID: PMC7682831 DOI: 10.1212/wnl.0000000000010669] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 06/03/2020] [Indexed: 12/12/2022] Open
Abstract
OBJECTIVE To employ diffusion imaging connectome methods to explore network development in the contralesional hemisphere of children with perinatal stroke and its relationship to clinical function. We hypothesized alterations in global efficiency of the intact hemisphere would correlate with clinical disability. METHODS Children with unilateral perinatal arterial (n = 26) or venous (n = 27) stroke and typically developing controls (n = 32) underwent 3T diffusion and T1 anatomical MRI and completed established motor assessments. A validated atlas coregistered to whole-brain tractography for each individual was used to estimate connectivity between 47 regions. Graph theory metrics (assortativity, hierarchical coefficient of regression, global and local efficiency, and small worldness) were calculated for the left hemisphere of controls and the intact contralesioned hemisphere of both stroke groups. Validated clinical motor assessments were then correlated with connectivity outcomes. RESULTS Global efficiency was higher in arterial strokes compared to venous strokes (p < 0.001) and controls (p < 0.001) and was inversely associated with all motor assessments (all p < 0.012). Additional graph theory metrics including assortativity, hierarchical coefficient of regression, and local efficiency also demonstrated consistent differences in the intact hemisphere associated with clinical function. CONCLUSIONS The structural connectome of the contralesional hemisphere is altered after perinatal stroke and correlates with clinical function. Connectomics represents a powerful tool to understand whole brain developmental plasticity in children with disease-specific cerebral palsy.
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Affiliation(s)
- Brandon T Craig
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada
| | - Alicia Hilderley
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada
| | - Eli Kinney-Lang
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada
| | - Xiangyu Long
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada
| | - Helen L Carlson
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada
| | - Adam Kirton
- From the Calgary Pediatric Stroke Program (B.T.C., A.H., E.K.-L., H.L.C., A.K.); and Hotchkiss Brain Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), Alberta Children's Hospital Research Institute (B.T.C., A.H., E.K.-L., X.L., H.L.C., A.K.), and Departments of Pediatrics (H.L.C., A.K.) and Clinical Neuroscience (A.K.), Cumming School of Medicine, University of Calgary, Canada.
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Dunbar M, Mineyko A, Hill M, Hodge J, Floer A, Kirton A. Population Based Birth Prevalence of Disease-Specific Perinatal Stroke. Pediatrics 2020; 146:peds.2020-013201. [PMID: 33115795 DOI: 10.1542/peds.2020-013201] [Citation(s) in RCA: 55] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/26/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Perinatal stroke encompasses multiple disease-specific cerebrovascular syndromes that cause lifelong neurodevelopmental morbidity for millions worldwide. Acute presentations include neonatal arterial ischemic stroke (NAIS), neonatal cerebral sinovenous thrombosis, and neonatal hemorrhagic stroke (NHS). Delayed presentations include arterial presumed perinatal ischemic stroke, periventricular venous infarction, and presumed perinatal hemorrhagic stroke. Our objective was to define the birth prevalence of all subtypes of perinatal stroke by using a population-based cohort. METHODS The Alberta Perinatal Stroke Project is a research cohort established in 2008 in southern Alberta, Canada, with prospective (2008-2017) and retrospective (1990-2008) enrollment leveraging universal health care at a single tertiary care pediatric center. The primary outcome was the estimated birth prevalence of each perinatal stroke syndrome, secondary outcomes were birth prevalence over time, sex ratios, and change in age at diagnosis. Analysis included Poisson regression, Wilcoxon rank test, and Fisher exact test. RESULTS The overall estimated birth prevalence of term-born perinatal stroke was 1:1100. The estimated birth prevalence was 1:3000 for NAIS, 1:7900 for arterial presumed perinatal ischemic stroke, 1:6000 for periventricular venous infarction, 1:9100 for cerebral sinovenous thrombosis, 1:6800 for NHS, and 1:65000 for presumed perinatal hemorrhagic stroke. The apparent birth prevalence of NAIS and NHS increased over time. There were more males affected than females. The age at diagnosis decreased for late-presenting stroke types. CONCLUSIONS The estimated birth prevalence of term perinatal stroke is higher than previous estimates, which may be explained by population-based sampling of disease-specific states. This emphasizes the need for further studies to better understand the disease-specific pathophysiology to improve treatment and prevention strategies.
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Affiliation(s)
- Mary Dunbar
- Departments of Community Health Sciences.,Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada.,Clinician Investigator Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Aleksandra Mineyko
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada.,Pediatrics.,Clinical Neuroscience.,Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Michael Hill
- Departments of Community Health Sciences.,Clinical Neuroscience.,Radiology, and.,Hotchkiss Brain Institute, Calgary, Alberta, Canada; and.,Medicine, Faculty of Medicine, and
| | - Jacquie Hodge
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada.,Pediatrics
| | - Amalia Floer
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada.,Pediatrics
| | - Adam Kirton
- Pediatrics, .,Clinical Neuroscience.,Radiology, and.,Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Calgary, Alberta, Canada; and.,Medicine, Faculty of Medicine, and
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62
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Developmental Remodelling of the Motor Cortex in Hemiparetic Children With Perinatal Stroke. Pediatr Neurol 2020; 112:34-43. [PMID: 32911261 DOI: 10.1016/j.pediatrneurol.2020.08.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 07/28/2020] [Accepted: 08/01/2020] [Indexed: 01/10/2023]
Abstract
BACKGROUND Perinatal stroke often leads to lifelong motor impairment. Two common subtypes differ in timing, location, and mechanism of injury: periventricular venous infarcts (PVI) are fetal white matter lesions while most arterial ischemic strokes (AIS) are cortical injuries acquired near term birth. Both alter motor system development and primary motor cortex (M1) plasticity, often with retained ipsilateral corticospinal fibers from the non-lesioned motor cortex (M1'). METHODS Task-based functional magnetic resonance imaging was used to define patterns of motor cortex activity during paretic and unaffected hand movement. Peak coordinates of M1, M1', and the supplementary motor area in the lesioned and intact hemispheres were compared to age-matched controls. Correlations between displacements and clinical motor function were explored. RESULTS Forty-nine participants included 14 PVI (12.59 ± 3.7 years), 13 AIS (14.91 ± 3.9 years), and 22 controls (13.91 ± 3.4 years). AIS displayed the greatest M1 displacement from controls in the lesioned hemisphere while PVI locations approximated controls. Peak M1' activations were displaced from the canonical hand knob in both PVI and AIS. Extent of M1 and M1' displacement were correlated (r = 0.50, P = 0.025) but were not associated with motor function. Supplementary motor area activity elicited by paretic tapping was displaced in AIS compared to controls (P = 0.003). CONCLUSION Motor network components may be displaced in both hemispheres after perinatal stroke, particularly in AIS and those with ipsilateral control of the affected limb. Modest correlations with clinical function may support that more complex models of developmental plasticity are needed to inform targets for individualized neuromodulatory therapies in children with perinatal stroke.
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Menéndez-Valladares P, Sola-Idígora N, Fuerte-Hortigón A, Alonso-Pérez I, Duque-Sánchez C, Domínguez-Mayoral AM, Ybot-González P, Montaner J. Lessons learned from proteome analysis of perinatal neurovascular pathologies. Expert Rev Proteomics 2020; 17:469-481. [PMID: 32877618 DOI: 10.1080/14789450.2020.1807335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
INTRODUCTION Perinatal and pediatric diseases related to neurovascular disorders cause significant problems during life, affecting a population with a long life expectancy. Early diagnosis and assessment of the severity of these diseases are crucial to establish an appropriate neuroprotective treatment. Currently, physical examination, neuroimaging and clinical judgment are the main tools for diagnosis, although these tests have certain limitations. There is growing interest in the potential value of noninvasive biomarkers that can be used to monitor child patients at risk of brain damage, allowing accurate, and reproducible measurements. AREAS COVERED This review describes potential biomarkers for the diagnosis of perinatal neurovascular diseases and discusses the possibilities they open for the classification and treatment of neonatal neurovascular diseases. EXPERT OPINION Although high rates of ischemic and hemorrhagic stroke exist in pediatric populations, most studies have focused on biomarkers of hypoxic-ischemic encephalopathy. Inflammatory and neuronal biomarkers such as S-100B and GFAP, in combination with others yet to be discovered, could be considered as part of multiplex panels to diagnose these diseases and potentially for monitoring response to treatments. Ideally, noninvasive biofluids would be the best source for evaluating these biomarkers in proteomic assays in perinatal patients.
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Affiliation(s)
| | - Noelia Sola-Idígora
- Neurodevelopment Group, Hospital Universitario Virgen Del Rocio/IBIS/CSIC/US , Sevilla, Spain
| | | | - Irene Alonso-Pérez
- Neuropediatric Unit, Hospital Universitario Virgen De Macarena , Sevilla, Spain
| | | | | | - Patricia Ybot-González
- Neurology Unit, Hospital Universitario Virgen De Macarena , Sevilla, Spain.,Neurodevelopment Group, Hospital Universitario Virgen Del Rocio/IBIS/CSIC/US , Sevilla, Spain
| | - Joan Montaner
- Neurology Unit, Hospital Universitario Virgen De Macarena , Sevilla, Spain.,The Neurovascular Research Lab, IBIS/HUVR/CSIC/US , Sevilla, Spain
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64
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Mineyko A, Nettel-Aguirre A, de Jesus P, Benseler S, Yusuf K, Narendran A, Kirton A. Association of neonatal inflammatory markers and perinatal stroke subtypes. Neurology 2020; 95:e1163-e1173. [PMID: 32727836 DOI: 10.1212/wnl.0000000000010309] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 03/30/2020] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To examine the relationship between neonatal inflammatory cytokines and perinatal stroke using a systems biology approach analyzing serum and blood-spot cytokines from 47 patients. METHODS This was a population-based, controlled cohort study with prospective and retrospective case ascertainment. Participants were recruited through the Alberta Perinatal Stroke Project. Stroke was classified as neonatal arterial ischemic stroke (NAIS), arterial presumed perinatal ischemic stroke (APPIS), or periventricular venous infarction (PVI). Biosamples were stored blood spots (retrospective) and acute serum (prospective). Controls had comparable gestational and maternal ages. Sixty-five cytokines were measured (Luminex). Hierarchical clustering analysis was performed to create heat maps. The Fisher linear discriminant analysis was used to create projection models to determine discriminatory boundaries between stroke types and controls. RESULTS A total of 197 participants were analyzed (27 with NAIS, 8 with APPIS, 12 with PVI, 150 controls). Cytokines were quantifiable with quality control measures satisfied (standards testing, decay analysis). Linear discriminant analysis had high accuracy in using cytokine profiles to separate groups. Profiles in participants with PVI and controls were similar. NAIS separation was accurate (sensitivity 77%, specificity 97%). APPIS mapping was also distinguishable from NAIS (sensitivity 86%, specificity 99%). Classification tree analysis generated similar diagnostic accuracy. CONCLUSIONS Unique inflammatory biomarker signatures are associated with specific perinatal stroke diseases. Findings support an acquired pathophysiology and suggest the possibility that at-risk pregnancies might be identified to develop prevention strategies. CLASSIFICATION OF EVIDENCE This study provides Class III evidence that differences in acute neonatal serum cytokine profiles can discriminate between patients with specific perinatal stroke diseases and controls.
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Affiliation(s)
- Aleksandra Mineyko
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada.
| | - Alberto Nettel-Aguirre
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Pauline de Jesus
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Susanne Benseler
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Kamran Yusuf
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Aru Narendran
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
| | - Adam Kirton
- From the Departments of Pediatrics (A.M., A.N.-A., S.B., K.Y., A.N., A.K.), Clinical Neurosciences (A.M., P.d.J., A.K.), and Community Health Sciences (A.N.-A.), Cumming School of Medicine, University of Calgary, Alberta, Canada
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65
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Hawe RL, Kuczynski AM, Kirton A, Dukelow SP. Robotic assessment of rapid motor decision making in children with perinatal stroke. J Neuroeng Rehabil 2020; 17:94. [PMID: 32664980 PMCID: PMC7362540 DOI: 10.1186/s12984-020-00714-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 06/25/2020] [Indexed: 11/20/2022] Open
Abstract
Background Activities of daily living frequently require children to make rapid decisions and execute desired motor actions while inhibiting unwanted actions. Children with hemiparetic cerebral palsy due to perinatal stroke may have deficits in executive functioning in addition to motor impairments. The objective of this study was to use a robotic object hit and avoid task to assess the ability of children with hemiparetic cerebral palsy to make rapid motor decisions. Methods Forty-five children with hemiparetic cerebral palsy due to perinatal stroke and 146 typically developing children (both groups ages 6–19 years) completed a robotic object hit and avoid task using the Kinarm Exoskeleton. Objects of different shapes fell from the top of the screen with increasing speed and frequency. Children were instructed to hit two specific target shapes with either hand, while avoiding six distractor shapes. The number of targets and distractors hit were compared between children with hemiparetic cerebral palsy and typically developing children, accounting for age effects. We also compared performance to a simpler object hit task where there were no distractors. Results We found that children with hemiparetic cerebral palsy hit a greater proportion of total distractors compared to typically developing children, demonstrating impairments in inhibitory control. Performance for all children improved with age. Children with hemiparetic cerebral palsy hit a greater percentage of targets with each arm on the more complex object hit and avoid task compared to the simpler object hit task, which was not found in typically developing children. Conclusions Children with hemiparetic cerebral palsy due to perinatal stroke demonstrated impairments in rapid motor decision making including inhibitory control, which can impede their ability to perform real-world tasks. Therapies that address both motor performance and executive functions are necessary to maximize function in children with hemiparetic cerebral palsy.
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Affiliation(s)
- Rachel L Hawe
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.
| | - Andrea M Kuczynski
- Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
| | - Adam Kirton
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.,Department of Pediatrics, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, AB, T3B 6A8, Canada.,Alberta Children's Hospital Research Institute, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, AB, T3B 6A8, Canada
| | - Sean P Dukelow
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
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Porcari GS, Jordan LC, Ichord RN, Licht DJ, Smith SE, Beslow LA. Outcome Trajectories after Primary Perinatal Hemorrhagic Stroke. Pediatr Neurol 2020; 105:41-47. [PMID: 31952959 PMCID: PMC7071982 DOI: 10.1016/j.pediatrneurol.2019.11.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 11/16/2019] [Accepted: 11/21/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Perinatal hemorrhagic stroke in late preterm and term neonates is understudied. We describe two-month and two-year neurological outcomes in a prospective cohort. METHODS Neonates ≥36 weeks' gestation with spontaneous hemorrhagic stroke (parenchymal and intraventricular) presenting at age ≤28 days were enrolled between March 2007 and May 2015 at three tertiary pediatric centers. Hemorrhagic transformation of arterial ischemic stroke or cerebral sinovenous thrombosis was excluded. The Pediatric Stroke Outcome Measure (PSOM) assessed outcomes. Wilcoxon signed-rank tests evaluated change over time. RESULTS Twenty-six neonates were included (median age: 1 day, interquartile range [IQR] 0 to 16; median gestational age: 38.3 weeks, IQR 37.0 to 39.0). Hemorrhage was isolated intraventricular in seven (27%), isolated intraparenchymal in six (23%), and a combination in 10 (39%). Three neonates (12%) died during hospitalization; one died later due to cardiac disease. Among 22 survivors, outcomes were assessed at a median of 2.1 months (IQR 1.7 to 3.3) in 96% and 1.9 years (IQR 1.3 to 2.0) in 73%. Median PSOM scores were 0.0 (IQR 0.0 to 1.0) and 0.25 (IQR 0.0 to 1.3), respectively. At two years, 45% of patients had no or nonimpairing deficits (PSOM <1.0), 30% had mild deficits (PSOM 1.0 to 2.0), and 5% had moderate deficits (PSOM 2.5 to 4.5). Over time, 31% worsened and 6% improved. Although total PSOM scores did not change significantly (P = 0.08), language subscores worsened (P = 0.009). No child developed epilepsy. CONCLUSIONS Perinatal hemorrhagic stroke survivors had favorable outcomes in early childhood; at two years moderate to severe deficits occurred in 5%. Language deficits may emerge over time, warranting close follow-up.
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Affiliation(s)
- Giulia S. Porcari
- Departments of Neurology and Pediatrics, Division of Child Neurology, Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA,Department of Pediatrics, Division of Pediatric Neurology, Vanderbilt University Medical Center, Nashville, TN
| | - Lori C. Jordan
- Department of Pediatrics, Division of Pediatric Neurology, Vanderbilt University Medical Center, Nashville, TN
| | - Rebecca N. Ichord
- Departments of Neurology and Pediatrics, Division of Child Neurology, Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Daniel J. Licht
- Departments of Neurology and Pediatrics, Division of Child Neurology, Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
| | - Sabrina E. Smith
- Department of Pediatric Neurology, Kaiser Permanente Oakland Medical Center, Oakland, CA
| | - Lauren A. Beslow
- Departments of Neurology and Pediatrics, Division of Child Neurology, Children’s Hospital of Philadelphia, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA
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Enhancing Stroke Recovery Across the Life Span With Noninvasive Neurostimulation. J Clin Neurophysiol 2020; 37:150-163. [DOI: 10.1097/wnp.0000000000000543] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Hawe RL, Kuczynski AM, Kirton A, Dukelow SP. Assessment of bilateral motor skills and visuospatial attention in children with perinatal stroke using a robotic object hitting task. J Neuroeng Rehabil 2020; 17:18. [PMID: 32054511 PMCID: PMC7020362 DOI: 10.1186/s12984-020-0654-1] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2019] [Accepted: 01/30/2020] [Indexed: 12/21/2022] Open
Abstract
Background While motor deficits are the hallmark of hemiparetic cerebral palsy, children may also experience impairments in visuospatial attention that interfere with participation in complex activities, including sports or driving. In this study, we used a robotic object hitting task to assess bilateral sensorimotor control and visuospatial skills in children with hemiparesis due to perinatal arterial ischemic stroke (AIS) or periventricular venous infarct (PVI). We hypothesized that performance would be impaired bilaterally and be related to motor behavior and clinical assessment of visuospatial attention. Methods Forty-nine children with perinatal stroke and hemiparetic cerebral palsy and 155 typically developing (TD) children participated in the study. Participants performed a bilateral object hitting task using the KINARM Exoskeleton Robot, in which they used virtual paddles at their fingertips to hit balls that fell from the top of the screen with increasing speed and frequency over 2.3 min. We quantified performance across 13 parameters including number of balls hit with each hand, movement speed and area, biases between hands, and spatial biases. We determined normative ranges of performance accounting for age by fitting 95% prediction bands to the TD children. We compared parameters between TD, AIS, and PVI groups using ANCOVAs accounting for age effects. Lastly, we performed regression analysis between robotic and clinical measures. Results The majority of children with perinatal stroke hit fewer balls with their affected arm compared to their typically developing peers. We also found deficits with the ipsilesional (“unaffected”) arm. Children with AIS had greater impairments than PVI. Despite hitting fewer balls, we only identified 18% of children as impaired in hand speed or movement area. Performance on the Behavioral Inattention Test accounted for 21–32% of the variance in number of balls hit with the unaffected hand. Conclusions Children with perinatal stroke-induced hemiparetic cerebral palsy may have complex bilateral deficits reflecting a combination of impairments in motor skill and visuospatial attention. Clinical assessments and interventions should address the interplay between motor and visuospatial skills.
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Affiliation(s)
- Rachel L Hawe
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.
| | - Andrea M Kuczynski
- Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
| | - Adam Kirton
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada.,Department of Pediatrics, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, AB, T3B 6A8, Canada.,Alberta Children's Hospital Research Institute, Alberta Children's Hospital, 2888 Shaganappi Trail NW, Calgary, AB, T3B 6A8, Canada
| | - Sean P Dukelow
- Department of Clinical Neurosciences, Hotchkiss Brain Institute, University of Calgary, 3330 Hospital Drive NW, Calgary, AB, T2N 4N1, Canada
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Abstract
Perinatal stroke is a heterogeneous syndrome resulting from brain injury of vascular origin that occurs between 20 weeks of gestation and 28 days of postnatal life. The incidence of perinatal stroke is estimated to be between 1:1600 and 1:3000 live births (approximately 2500 children per year in the United States), though its actual incidence is difficult to estimate because it is likely underdiagnosed. Perinatal arterial ischemic stroke (PAIS) accounts for approximately 70% of cases of perinatal stroke. Cerebral sinovenous thrombosis, while less common, also accounts for a large proportion of the morbidity and mortality seen with perinatal stroke. Hemorrhagic stroke leads to disruption of neurologic function due to intracerebral hemorrhage that is nontraumatic in origin. While most cases of PAIS fall into one of these three categories, other patterns of injury should also be considered perinatal stroke. In some cases, the etiology of PAIS is not known but is idiopathic. This chapter will review the classification, risk factors, pathogenesis, clinical presentation, management, and long-term sequelae of perinatal stroke.
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Affiliation(s)
- Emmett E Whitaker
- Department of Anesthesiology, University of Vermont Larner College of Medicine, Burlington, VT, United States; Department of Neurological Sciences, University of Vermont Larner College of Medicine, Burlington, VT, United States.
| | - Marilyn J Cipolla
- Department of Neurological Sciences, University of Vermont Larner College of Medicine, Burlington, VT, United States; Department of Obstetrics, Gynecology & Reproductive Sciences, University of Vermont Larner College of Medicine, Burlington, VT, United States; Department of Pharmacology, University of Vermont Larner College of Medicine, Burlington, VT, United States
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Abstract
Perinatal strokes are a diverse but specific group of focal cerebrovascular injuries that occur early in brain development and affect an estimated 5 million people worldwide. The objective of this review is to describe the epidemiology, clinical presentations, pathophysiology, outcomes, and management for the 6 subtypes of perinatal stroke. Some perinatal strokes are symptomatic in the first days of life, typically with seizures, including neonatal arterial ischemic stroke, neonatal hemorrhagic stroke, and cerebral sinovenous thrombosis. The remaining subtypes present in the first year of life or later, usually with motor asymmetry and include arterial presumed perinatal ischemic stroke, presumed perinatal hemorrhagic stroke, and in utero periventricular venous infarction. The consequences of these injuries include cerebral palsy, epilepsy, and cognitive and behavioral challenges, in addition to the psychosocial impact on families. While there have been significant advances in understanding mechanisms of both injury and recovery, there is still a great deal to learn regarding causation and the optimization of outcomes.
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Affiliation(s)
- Mary Dunbar
- Department of Community Health Sciences, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Department of Pediatrics, University of Calgary, Calgary, AB, Canada; Department of Clinical Neuroscience, University of Calgary, Calgary, AB, Canada; Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, Calgary, AB, Canada; Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada.
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71
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Abstract
Background and Purpose- Subpial hemorrhage of the neonate is a rare stroke subtype reported in few case series. Birth trauma and coagulopathy are commonly proposed etiologies. We evaluated our subpial hemorrhage of the neonate patient cohort to expand current understanding Methods- Cases of subpial hemorrhage of the neonate were identified by keyword searches of the institutional database. The medical records and magnetic resonance imagings were reviewed. Results- Seventeen cases were identified. Assisted delivery occurred in 12% of cases, and acute coagulation abnormalities occurred in 77%. Subpial hemorrhage of the neonate was located in the temporal lobe in 82%, with cytotoxic edema and medullary vein congestion and thrombosis subjacent to the hemorrhages in 100% and 76% of cases, respectively. Neurological disability was present in 44% of survivors. Three patients had chronic coagulation abnormalities. Conclusions- In our cohort, clinical findings supporting a potential relationship with birth trauma were infrequent. The imaging findings suggest a nonarterial, deep venous pattern of hemorrhagic ischemia.
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Affiliation(s)
- Donald W Cain
- From the Department of Radiology (D.W.C.), University of Colorado Anschutz, Aurora
| | - Andra L Dingman
- Department of Pediatric Neurology (A.L.D., J.A.), University of Colorado Anschutz, Aurora
| | - Jennifer Armstrong
- Department of Pediatric Neurology (A.L.D., J.A.), University of Colorado Anschutz, Aurora
| | - Nicholas V Stence
- Department of Radiology (N.V.S., D.M.M.), Children's Hospital Colorado, Aurora
| | - Alexandria M Jensen
- Department of Biostatistics and Informatics, Colorado School of Public Health, Aurora (A.M.J.)
| | - David M Mirsky
- Department of Radiology (N.V.S., D.M.M.), Children's Hospital Colorado, Aurora
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Tamura G, Inagaki T. Removal of a minimal amount of subdural hematoma is effective and sufficient for term neonates with severe symptomatic spontaneous parenchymal hemorrhage. Childs Nerv Syst 2019; 35:2237-2240. [PMID: 30879127 DOI: 10.1007/s00381-019-04114-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2019] [Accepted: 03/07/2019] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Spontaneous parenchymal hemorrhage of term neonates is usually asymptomatic and does not require surgical intervention. However, there is no consensus on the management of cases with severe life-threatening symptoms, including repeated apnea, respiratory failure with severe cyanosis, severe bradycardia, or uncontrolled seizures. CASES Our medical records of term neonates with intracranial hemorrhage who underwent surgical intervention were retrospectively reviewed. There were two cases with spontaneous parenchymal hemorrhage. Both cases were delivered vaginally without any use of forceps or vacuum devices. Neither of them showed asphyxia, hypoxic-ischemic encephalopathy, hematological abnormalities, congenital vascular anomalies, infection, or birth trauma. Common symptoms included apnea, cyanosis, bradycardia, and decreased consciousness. The original location of bleeding was the parenchyma of the right temporal lobe. The hemorrhage extended to subdural spaces in both cases. Subdural hematoma (SDH) removal was performed without manipulating the parenchymal hematoma. Only a small amount of SDH (approximately 5 ml) was drained spontaneously with irrigation, which was sufficient to decrease the elevated intracranial pressure. The patients' respiratory conditions improved dramatically after the surgery. CONCLUSION We propose that removing only a small amount of SDH would be effective and sufficient to relieve severe symptoms of increased intracranial pressure in term neonates with massive spontaneous parenchymal hemorrhage.
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Affiliation(s)
- Goichiro Tamura
- Division of Pediatric Neurosurgery, Ibaraki Children's Hospital, 3-3-1 Futabadai, Mito, Ibaraki, 311-4145, Japan.
| | - Takayuki Inagaki
- Division of Pediatric Neurosurgery, Ibaraki Children's Hospital, 3-3-1 Futabadai, Mito, Ibaraki, 311-4145, Japan
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Srivastava R, Rajapakse T, Carlson HL, Keess J, Wei XC, Kirton A. Diffusion Imaging of Cerebral Diaschisis in Neonatal Arterial Ischemic Stroke. Pediatr Neurol 2019; 100:49-54. [PMID: 31147227 DOI: 10.1016/j.pediatrneurol.2019.04.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 04/19/2019] [Accepted: 04/20/2019] [Indexed: 01/28/2023]
Abstract
BACKGROUND Neonatal arterial ischemic stroke is a leading cause of cerebral palsy and lifelong disability. Diffusion-weighted imaging has revolutionized diagnosis and facilitated outcome prognostication in acute neonatal arterial ischemic stroke. Diaschisis refers to changes in brain areas functionally connected but structurally remote from primary injury. We hypothesized that acute diffusion-weighted imaging can quantify cerebral diaschisis and is associated with outcome from neonatal arterial ischemic stroke. METHODS Subjects were identified from a prospective, population-based research cohort (Alberta Perinatal Stroke Project). Inclusion criteria were unilateral middle cerebral artery neonatal arterial ischemic stroke, diffusion-weighted magnetic resonance imaging within 10 days of birth, and more than 12-months follow-up (pediatric stroke outcome measure). Diaschisis was characterized and quantified using a validated software method (ImageJ). Volumetric analysis assessed atrophy of affected structures. Diaschisis scores were corrected for infarct size and compared with outcomes (Mann-Whitney). RESULTS From 20 eligible neonatal arterial ischemic strokes, two were excluded for poor image quality. Of 18 remaining (61% male, median age 3.2 days), 16 (89%) demonstrated diaschisis. Thalamus (88%) was the most common location in addition to corpus callosum (50%). Age at imaging was not associated with diaschisis. Affected structures demonstrated atrophy on imaging. Long-term outcomes available in 81% (median age 7.5 years) were not associated with diaschisis scores. CONCLUSIONS Cerebral diaschisis occurs in neonatal arterial ischemic stroke and can be quantified with diffusion-weighted imaging. Occurrence is common and should not be mistaken for additional infarction. Determining clinical significance will require larger samples with well-characterized long-term outcomes.
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Affiliation(s)
- Ratika Srivastava
- Division of Pediatric Neurology, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Stollery Children's Hospital, Edmonton, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Thilinie Rajapakse
- Division of Pediatric Neurology, Department of Pediatrics, Faculty of Medicine and Dentistry, University of Alberta, Stollery Children's Hospital, Edmonton, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Helen L Carlson
- Calgary Pediatric Stroke Program, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Jamie Keess
- Calgary Pediatric Stroke Program, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Xing-Chang Wei
- Department of Radiology, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.
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Liko J, Koenig WJ, Cieslak PR. Five-Year Follow-up of a Severe Case of Pertussis in Oregon, 2012. Public Health Rep 2019; 134:587-591. [PMID: 31568732 PMCID: PMC6832090 DOI: 10.1177/0033354919879727] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Oregon continues to face epidemics of pertussis, and infants younger than 2 months of age have the highest incidence and rates of hospitalization and complications. We describe the medical course and sequelae of an infant's severe pertussis illness through age 5½ years. The child has failed to meet developmental milestones, requires substantial medical care, and bears the burdens of chronic lung disease, stroke, epilepsy, impaired neurodevelopment, and problems with vision. The medical and social burden of pertussis among infants too young to be vaccinated underscores the importance of tetanus toxoid, reduced diphtheria toxoid, and acellular pertussis vaccination during pregnancy.
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Affiliation(s)
- Juventila Liko
- Oregon Immunization Program, Public Health Division, Oregon Health
Authority, Portland, OR, USA
| | | | - Paul R. Cieslak
- Communicable Diseases and Immunizations, Public Health Division, Oregon
Health Authority, Portland, OR, USA
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75
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Riddell M, Kuo HC, Zewdie E, Kirton A. Mirror movements in children with unilateral cerebral palsy due to perinatal stroke: clinical correlates of plasticity reorganization. Dev Med Child Neurol 2019; 61:943-949. [PMID: 30690708 DOI: 10.1111/dmcn.14155] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 11/27/2018] [Indexed: 11/29/2022]
Abstract
AIM We aimed to determine if the mirror movements that often result in children with unilateral cerebral palsy (CP) after perinatal stroke represent a clinical biomarker of developmental plasticity. METHOD This was a prospective, controlled cohort study. Mirror movements in children with unilateral CP from a population-based cohort were compared to those of typically developing controls. The population with stroke was assessed further via electromyography (EMG), motor function, and corticospinal organization investigations. Mirror movements were quantified (0-5) bidirectionally. EMG mirror movements were quantified during voluntary contraction. Motor function was quantified by validated measures including the Assisting Hand Assessment (AHA). Corticospinal organization was categorized as ipsilateral or contralateral using transcranial magnetic stimulation (TMS). The relationships between mirror movements, function, and corticospinal organization were assessed (t-tests, Pearson rank correlation coefficients). RESULTS Ninety-two participants were scored (55 males, 37 females, mean [SD] 12y [5y 6mo], range 4-17y), 63 with complete motor outcomes and 39 with TMS data. EMG ratios correlated with clinical mirror movements (r=0.562, p=0.008). Mild mirror activity in controls declined with age (r=-0.459, p<0.001). Mirroring was stronger with tasks performed by the affected hand (p<0.001). Mirror movements correlated with AHA scores (r=-0.255, p=0.04) and poor motor outcome (p<0.001). Unaffected hand mirror activity was higher in children with ipsilateral corticospinal tract arrangements (p<0.001). INTERPRETATION Clinical mirror movements correlate with disability and corticospinal organization in children with unilateral CP with perinatal stroke. This simple bedside biomarker could facilitate patient selection for personalized rehabilitation. WHAT THIS PAPER ADDS Mirror movements are a clinical indicator of corticospinal organization in children with unilateral cerebral palsy with perinatal stroke. Mirroring is strongest in children with ipsilateral corticospinal tract reorganization. The concept of a 'directionality factor' to mirror movements highlights additional, clinically relevant functional correlations.
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Affiliation(s)
- Madison Riddell
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, Alberta, Canada
| | - Hsing-Ching Kuo
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Calgary, Alberta, Canada
| | - Ephrem Zewdie
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, Alberta, Canada.,Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, Alberta, Canada.,Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, Calgary, Alberta, Canada.,Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada.,Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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76
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Carlson HL, Sugden C, Brooks BL, Kirton A. Functional connectivity of language networks after perinatal stroke. Neuroimage Clin 2019; 23:101861. [PMID: 31141787 PMCID: PMC6536856 DOI: 10.1016/j.nicl.2019.101861] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Revised: 04/17/2019] [Accepted: 05/19/2019] [Indexed: 02/06/2023]
Abstract
Successful language acquisition during development is imperative for lifelong function. Complex language networks develop throughout childhood. Perinatal stroke may cause significant language disabilities but function can also be remarkably normal. Studying such very early brain injury populations may inform developmental plasticity models of language networks. We examined functional connectivity (FC) of language networks in children with arterial and venous perinatal stroke and typically developing controls (TDC) in a population-based, controlled, cohort study. Resting state functional MRI was performed at 3 T (TR/TE = 2000/30 ms, 150 volumes, 3.6mm3 voxels). Seed-based analyses used bilateral inferior frontal and superior temporal gyri. A subset of stroke participants completed clinical language testing. Sixty-six children participated (median age: 12.85±3.8y, range 6-19; arterial N = 17; venous N = 15; TDC N = 34]. Children with left hemisphere strokes had comparable FC in their right hemispheres compared to TDC. Inter- and intra-hemispheric connectivity strengths were similar between TDC and PVI but lower for AIS. Reduced FC was associated with poorer language comprehension. Language networks can be estimated using resting-state fMRI in children with perinatal stroke. Altered connectivity may occur in both hemispheres, is more pronounced with arterial lesions, and is associated with clinical function. Our results have implications for therapeutic language interventions after early stroke.
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Affiliation(s)
- Helen L Carlson
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute (ACHRI), Calgary, AB, Canada; Department of Pediatrics, University of Calgary, Calgary, AB, Canada.
| | - Cole Sugden
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada
| | - Brian L Brooks
- Alberta Children's Hospital Research Institute (ACHRI), Calgary, AB, Canada; Department of Pediatrics, University of Calgary, Calgary, AB, Canada; Neuropsychology Service, Alberta Children's Hospital, Calgary, AB, Canada; Department of Psychology, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, Calgary, AB, Canada; Alberta Children's Hospital Research Institute (ACHRI), Calgary, AB, Canada; Department of Pediatrics, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, University of Calgary, Calgary, AB, Canada; Department of Radiology, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
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77
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Fluss J, Dinomais M, Chabrier S. Perinatal stroke syndromes: Similarities and diversities in aetiology, outcome and management. Eur J Paediatr Neurol 2019; 23:368-383. [PMID: 30879961 DOI: 10.1016/j.ejpn.2019.02.013] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 02/04/2019] [Accepted: 02/24/2019] [Indexed: 01/09/2023]
Abstract
With a birth-prevalence of 37-67/100,000 (mostly term-born), perinatal stroke encompasses distinct disease-states with diverse causality, mechanism, time of onset, mode of presentation and outcome. Neonatal primary haemorrhagic stroke and ischemic events (also divided into neonatal arterial ischemic stroke and neonatal cerebral sinus venous thrombosis) that manifest soon after birth are distinguished from presumed perinatal - ischemic or haemorrhagic - stroke. Signs of the latter become apparent only beyond the neonatal period, most often with motor asymmetry or milestones delay, and occasionally with seizures. Acute or remote MRI defines the type of stroke and is useful for prognosis. Acute care relies on homeostatic maintenance. Seizures are often self-limited and anticonvulsant agents might be discontinued before discharge. Prolonged anticoagulation for a few weeks is an option in some cases of sinovenous thrombosis. Although the risk of severe impairment is low, many children develop mild to moderate multimodal developmental issues that require a multidisciplinary approach.
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Affiliation(s)
- Joel Fluss
- Pediatric Neurology Unit, Geneva Children's Hospital, 6 rue Willy-Donzé, 1211 Genève 4, Switzerland
| | - Mickaël Dinomais
- CHU Angers, Département de Médecine Physique et de Réadaptation, CHU Angers-Capucins, F-49933, Angers, France; Université d'Angers, Laboratoire Angevin de Recherche en Ingénierie des Systèmes (LARIS) EA7315, F-49000, Angers, France
| | - Stéphane Chabrier
- CHU Saint-Étienne, French Centre for Paediatric Stroke, Paediatric Physical and Rehabilitation Medicine Department, INSERM, CIC 1408, F-42055, Saint-Étienne, France; INSERM, U1059 Sainbiose, Univ Saint-Étienne, Univ Lyon, F-42023, Saint-Étienne, France.
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78
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Management of Stroke in Neonates and Children: A Scientific Statement From the American Heart Association/American Stroke Association. Stroke 2019; 50:e51-e96. [DOI: 10.1161/str.0000000000000183] [Citation(s) in RCA: 240] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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79
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Clive B, Vincer M, Ahmad T, Khan N, Afifi J, El-Naggar W. Epidemiology of neonatal stroke: A population-based study. Paediatr Child Health 2019; 25:20-25. [PMID: 33390736 DOI: 10.1093/pch/pxy194] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 10/16/2018] [Indexed: 11/13/2022] Open
Abstract
Objective The goal of this study was to obtain population-based data on the incidence, clinical presentation, management, imaging features, and long-term outcomes of patients with all types of neonatal stroke (NS). Methods Full-term neonates with NS born between January 2007 and December 2013 were identified through the Nova Scotia Provincial Perinatal Follow-up Program Database. Perinatal data and neonatal course were reviewed. Neurodevelopmental outcomes were assessed at 18 and 36 months of age using standardized testing. Results Twenty-nine neonates with NS were identified during the study period, giving an incidence of 47 per 100,000 live births in Nova Scotia. Arterial ischemic stroke was the most common stroke type (76%), followed by neonatal hemorrhagic stroke (17%), then cerebral sinovenous thrombosis (7%). The majority of neonates presented with seizures (86%) on the first day of life (76%). At 36 months of age, 23 (79%) of the children had a normal outcome, while 3 (10%) were diagnosed with cerebral palsy (2 with neonatal arterial stroke and one with neonatal hemorrhagic stroke) and 3 (10%) had recurrent seizures (1 patient from each stroke subtype group). Conclusion The incidence of NS in Nova Scotia is higher than what has been reported internationally in the literature. However, the neurodevelopmental outcomes at 3 years of age are better. Further studies are required to better understand the reasons for these findings.
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Affiliation(s)
- Breanna Clive
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia
| | - Michael Vincer
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia
| | - Tahani Ahmad
- Departemnt of Diagnostic Imaging, Dalhousie University, Halifax, Nova Scotia
| | - Naeem Khan
- Departemnt of Diagnostic Imaging, Dalhousie University, Halifax, Nova Scotia
| | - Jehier Afifi
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia
| | - Walid El-Naggar
- Department of Pediatrics, Dalhousie University, Halifax, Nova Scotia
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80
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Hilderley AJ, Metzler MJ, Kirton A. Noninvasive Neuromodulation to Promote Motor Skill Gains After Perinatal Stroke. Stroke 2019; 50:233-239. [DOI: 10.1161/strokeaha.118.020477] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Alicia J. Hilderley
- From the Department of Pediatrics, Cumming School of Medicine, University of Calgary, Alberta, Canada (A.J.H., A.K.)
- Alberta Children’s Hospital Research Institute, University of Calgary, Alberta, Canada (A.J.H., M.J.M., A.K.)
| | - Megan J. Metzler
- Alberta Children’s Hospital Research Institute, University of Calgary, Alberta, Canada (A.J.H., M.J.M., A.K.)
| | - Adam Kirton
- From the Department of Pediatrics, Cumming School of Medicine, University of Calgary, Alberta, Canada (A.J.H., A.K.)
- Alberta Children’s Hospital Research Institute, University of Calgary, Alberta, Canada (A.J.H., M.J.M., A.K.)
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Woodward KE, Carlson HL, Kuczynski A, Saunders J, Hodge J, Kirton A. Sensory-motor network functional connectivity in children with unilateral cerebral palsy secondary to perinatal stroke. Neuroimage Clin 2019; 21:101670. [PMID: 30642756 PMCID: PMC6412078 DOI: 10.1016/j.nicl.2019.101670] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 12/23/2018] [Accepted: 01/07/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND Perinatal stroke is the most common cause of unilateral cerebral palsy. Mechanisms of post-stroke developmental plasticity in children are poorly understood. To better understand the relationship between functional connectivity and disability, we used resting-state fMRI to compare sensorimotor connectivity with clinical dysfunction. METHODS School-aged children with periventricular venous infarction (PVI) and unilateral cerebral palsy were compared to controls. Resting-state BOLD signal was acquired on 3 T MRI and analyzed using CONN in SPM12. Functional connectivity was computed between S1, M1, supplementary motor area (SMA), and thalamus of the left/non-lesioned and right/lesioned hemisphere. Primary outcome was connectivity expressed as a Fisher-transformed correlation coefficient. Motor function was measured using the Assisting Hand Assessment (AHA), and Melbourne Assessment (MA). Proprioceptive function was measured using a robotic position matching task (VarXY). RESULTS Participants included 15 PVI and 21 controls. AHA and MA in stroke patients were negatively correlated with connectivity (increased connectivity = poorer performance). Position sense was inversely correlated with connectivity (increased connectivity = improved performance) between the non-lesioned S1 and thalamus/SMA. In controls, VarXY was positively correlated with connectivity between the thalamus and bilateral sensorimotor regions. CONCLUSIONS Resting state fMRI measures of sensorimotor connectivity are associated with clinical sensorimotor function in children with unilateral cerebral palsy secondary to PVI. Greater insight into understanding reorganization of brain networks following perinatal stroke may facilitate personalized rehabilitation.
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Affiliation(s)
- K E Woodward
- Department of Clinical Neurosciences, Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada.
| | - H L Carlson
- Department of Clinical Neurosciences, Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada.
| | - A Kuczynski
- Department of Neurosciences and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB T2N4N1, Canada.
| | - J Saunders
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada.
| | - J Hodge
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada.
| | - A Kirton
- Calgary Pediatric Stroke Program, Alberta Children's Hospital, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada; Department of Clinical Neurosciences, Cumming School of Medicine, Alberta Children's Hospital Research Institute, University of Calgary, 2888 Shaganappi Trial NW, Calgary, AB T3B6A8, Canada; Department of Neurosciences and Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, 3330 Hospital Dr NW, Calgary, AB T2N4N1, Canada.
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Craig BT, Carlson HL, Kirton A. Thalamic diaschisis following perinatal stroke is associated with clinical disability. Neuroimage Clin 2019; 21:101660. [PMID: 30639178 PMCID: PMC6412070 DOI: 10.1016/j.nicl.2019.101660] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2018] [Revised: 12/26/2018] [Accepted: 01/04/2019] [Indexed: 11/26/2022]
Abstract
BACKGROUND Perinatal stroke causes most hemiparetic cerebral palsy and leads to lifelong disability. Understanding developmental neuroplasticity following early stroke is increasingly translated into novel therapies. Diaschisis refers to alterations brain structures remote from, but connected to, stroke lesions. Ipsilesional thalamic diaschisis has been described following adult stroke but has not been investigated in perinatal stroke. We hypothesized that thalamic diaschisis occurs in perinatal stroke and its degree would be inversely correlated with clinical motor function. METHODS Population-based, controlled cohort study. Participants were children (<19 years) with unilateral perinatal stroke (arterial ischemic stroke [AIS] or periventricular venous infarction [PVI]), anatomical magnetic resonance imaging (MRI) >6 months of age, symptomatic hemiparetic cerebral palsy, and no additional neurologic disorders. Typically developing controls had comparable age and gender proportions. T1-weighted anatomical scans were parcellated into 99 regions of interest followed by generation of regional volumes. The primary outcome was thalamic volume expressed as ipsilesional (ILTV), contralesional (CLTV) and thalamic ratio (CLTV/ILTV). Standardized clinical motor assessments were correlated with thalamic volume metrics. RESULTS Fifty-nine participants (12.9 years old ±4.0 years, 46% female) included 20 AIS, 11 PVI, and 28 controls. ILTV was reduced in both AIS and PVI compared to controls (p < .001, p = .029, respectively). Ipsilesional thalamic diaschisis was not associated with clinical motor function. However, CLTV was significantly larger in AIS compared to both controls and PVI (p = .005, p < .001, respectively). CLTV was inversely correlated with all four clinical motor assessments (all p < .003). CONCLUSION Bilateral thalamic volume changes occur after perinatal stroke. Ipsilesional volume loss is not associated with clinical motor function. Contralesional volume is inversely correlated with clinical motor function, suggesting the thalamus is involved in the known developmental plasticity that occurs in the contralesional hemisphere after early unilateral injury.
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Affiliation(s)
- Brandon T Craig
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Helen L Carlson
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Hotchkiss Brain Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Calgary Pediatric Stroke Program, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada.
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83
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Dunbar M, Shah H, Shinde S, Vayalumkal J, Vanderkooi OG, Wei XC, Kirton A. Stroke in Pediatric Bacterial Meningitis: Population-Based Epidemiology. Pediatr Neurol 2018; 89:11-18. [PMID: 30392967 DOI: 10.1016/j.pediatrneurol.2018.09.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 09/05/2018] [Accepted: 09/13/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND Bacterial meningitis is a severe infection of the nervous system with a high complication rate including stroke. The purpose of this study is to assess the incidence, risk factors, patterns, and outcomes in pediatric meningitis complicated by stroke. METHODS The study design was a population-based, 10-year retrospective (2002 to 2012) cohort study set in Southern Alberta, Canada. The inclusion criteria were: (1) age from newborn to 18 years, (2) brain magnetic resonance imaging (MRI) including diffusion-weighted imaging during admission, and (3) laboratory confirmed acute bacterial meningitis. The main outcomes were demographics, clinical presentations, risk factors, laboratory findings, radiographic findings, and neurological outcomes. FINDINGS Forty-three patients had confirmed bacterial meningitis and diffusion MRI (9 neonates (21%), 89% male; 22 infants aged one month to one year (51%), 50% male; and 12 children older than one year (28%), 58% male, median age four years (interquartile range 7.9 years). Ischemic stroke was confirmed in 16/43 (37%), often multifocal (94%). Patients with stroke were significantly more likely to have seizures (P = 0.025), otitis media (P = 0.029), and multiple presentations to hospital (P = 0.013). Mortality was 25% in children with stroke compared with 4% in those without (P = 0.067). Survivors with stroke were more likely to have neurological deficits at follow-up (69% versus 26%, P = 0.019). CONCLUSIONS More than one-third of children with acute bacterial meningitis and clinically indicated MRI had ischemic stroke. Stroke was associated with clinical factors including duration of illness, seizures, and causative organisms. Stroke was associated with higher mortality and morbidity, warranting consideration of increased MRI screening and new approaches to treatment.
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Affiliation(s)
- Mary Dunbar
- Department of Community Health Services, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada
| | - Hely Shah
- Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Siddharth Shinde
- Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Joseph Vayalumkal
- Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada
| | - Otto G Vanderkooi
- Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Xing-Chang Wei
- Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Adam Kirton
- Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada; Department of Clinical Neuroscience, University of Calgary, Calgary, Alberta, Canada; Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Community Health Services, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada; Hotchkiss Brain Institute, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada.
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84
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Saunders J, Carlson HL, Cortese F, Goodyear BG, Kirton A. Imaging functional motor connectivity in hemiparetic children with perinatal stroke. Hum Brain Mapp 2018; 40:1632-1642. [PMID: 30447082 DOI: 10.1002/hbm.24474] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 11/02/2018] [Accepted: 11/05/2018] [Indexed: 01/18/2023] Open
Abstract
Perinatal stroke causes lifelong disability, particularly hemiparetic cerebral palsy. Arterial ischemic strokes (AIS) are large, cortical, and subcortical injuries acquired near birth due to acute occlusion of the middle cerebral artery. Periventricular venous infarctions (PVI) are smaller, subcortical strokes acquired prior to 34 weeks gestation involving injury to the periventricular white matter. Both stroke types can damage motor pathways, thus, we investigated resulting alterations in functional motor networks and probed function. We measured blood oxygen level dependent (BOLD) fluctuations at rest in 38 participants [10 arterial patients (age = 14.7 ± 4.1 years), 10 venous patients (age = 13.5 ± 3.7 years), and 18 typically developing controls (TDCs) (age = 15.3 ± 5.1 years)] and explored strength and laterality of functional connectivity in the motor network. Inclusion criteria included MRI-confirmed, unilateral perinatal stroke, symptomatic hemiparetic cerebral palsy, and 6-19 years old at time of imaging. Seed-based functional connectivity analyses measured temporal correlations in BOLD response over the whole brain using primary motor cortices as seeds. Laterality indices based on mean z-scores in lesioned and nonlesioned hemispheres explored laterality. In AIS patients, significant differences in both strength and laterality of motor network connections were observed compared with TDCs. In PVI patients, motor networks largely resembled those of healthy controls, albeit slightly weaker and asymmetric, despite subcortical damage and hemiparesis. Functional connectivity strengths were not related to motor outcome scores for either stroke group. This study serves as a foundation to better understand how resting-state fMRI can assess motor functional connectivity and potentially be applied to explore mechanisms of interventional therapies after perinatal stroke.
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Affiliation(s)
- Jennifer Saunders
- Neuroscience Graduate Program, University of Calgary, Calgary, Alberta, Canada.,Calgary Pediatric Stroke Program, Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Helen L Carlson
- Calgary Pediatric Stroke Program, Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada
| | - Filomeno Cortese
- Seaman Family MR Research Centre, Foothills Medical Centre, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada
| | - Bradley G Goodyear
- Seaman Family MR Research Centre, Foothills Medical Centre, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.,Departments of Radiology and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, Alberta Children's Hospital Research Institute, Calgary, Alberta, Canada.,Hotchkiss Brain Institute, University of Calgary, Calgary, Alberta, Canada.,Departments of Pediatrics and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada
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85
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Kuo HC, Zewdie E, Ciechanski P, Damji O, Kirton A. Intervention-Induced Motor Cortex Plasticity in Hemiparetic Children With Perinatal Stroke. Neurorehabil Neural Repair 2018; 32:941-952. [DOI: 10.1177/1545968318801546] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Hsing-Ching Kuo
- Alberta Children’s Hospital, Calgary, Alberta, Canada
- Alberta Children’s Hospital Research Institute (ACHRI), Calgary, AB, Canada
- University of Calgary, Calgary, Alberta, Canada
| | - Ephrem Zewdie
- Alberta Children’s Hospital, Calgary, Alberta, Canada
- Alberta Children’s Hospital Research Institute (ACHRI), Calgary, AB, Canada
- University of Calgary, Calgary, Alberta, Canada
| | - Patrick Ciechanski
- Alberta Children’s Hospital, Calgary, Alberta, Canada
- Alberta Children’s Hospital Research Institute (ACHRI), Calgary, AB, Canada
| | - Omar Damji
- Alberta Children’s Hospital, Calgary, Alberta, Canada
| | - Adam Kirton
- Alberta Children’s Hospital, Calgary, Alberta, Canada
- Alberta Children’s Hospital Research Institute (ACHRI), Calgary, AB, Canada
- University of Calgary, Calgary, Alberta, Canada
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86
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Decreasing prevalence and severity of cerebral palsy in Norway among children born 1999 to 2010 concomitant with improvements in perinatal health. Eur J Paediatr Neurol 2018; 22:814-821. [PMID: 29779984 DOI: 10.1016/j.ejpn.2018.05.001] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 03/16/2018] [Accepted: 05/01/2018] [Indexed: 11/21/2022]
Abstract
BACKGROUND The aim of our study was to explore if the prevalence and clinical characteristics of cerebral palsy (CP), concomitant with perinatal health indicators in the general population, remained unchanged for children born in Norway between 1999 and 2010. METHODS This national multi-register cohort study included 711 174 children recorded in the Medical Birth Registry of Norway. Among these, 707 916 were born alive, and 1664 had a validated diagnosis of CP recorded in the Cerebral Palsy Registry of Norway and/or the Norwegian Patient Registry. Prevalence per 1000 live births as a function of birth year was analyzed using logistic regression with fractional polynomials to allow for non-linear trends. Chi-square statistics were used to estimate trends in proportions of clinical characteristics. RESULTS The prevalence of CP in Norway decreased from 2.62 per 1000 live births in 1999 to 1.89 in 2010. The reduction was most evident among children with bilateral CP, in particular those with diplegia. During the study period, the proportions of children with severe motor impairments, epilepsy, intellectual impairment and reduced speech also decreased. At the same time, perinatal mortality has decreased in Norway, along with the proportion of women with preeclampsia, children born preterm or as a multiple. CONCLUSION We observed a significant decrease in the prevalence and severity of CP subtypes and associated impairments among children with CP in Norway. This coincided with improvements in perinatal health indicators in the general population. These improvements are most likely explained by advancements in obstetric and neonatal care.
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87
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Korzeniewski SJ, Slaughter J, Lenski M, Haak P, Paneth N. The complex aetiology of cerebral palsy. Nat Rev Neurol 2018; 14:528-543. [PMID: 30104744 DOI: 10.1038/s41582-018-0043-6] [Citation(s) in RCA: 136] [Impact Index Per Article: 22.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Cerebral palsy (CP) is the most prevalent, severe and costly motor disability of childhood. Consequently, CP is a public health priority for prevention, but its aetiology has proved complex. In this Review, we summarize the evidence for a decline in the birth prevalence of CP in some high-income nations, describe the epidemiological evidence for risk factors, such as preterm delivery and fetal growth restriction, genetics, pregnancy infection and other exposures, and discuss the success achieved so far in prevention through the use of magnesium sulfate in preterm labour and therapeutic hypothermia for birth-asphyxiated infants. We also consider the complexities of disentangling prenatal and perinatal influences, and of establishing subtypes of the disorder, with a view to accelerating the translation of evidence into the development of strategies for the prevention of CP.
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Affiliation(s)
- Steven J Korzeniewski
- Department of Obstetrics & Gynecology, Wayne State University School of Medicine, Detroit, MI, USA.
| | - Jaime Slaughter
- Department of Health Systems and Sciences Research and Department of Epidemiology and Biostatistics, Drexel University, Philadelphia, PA, USA
| | - Madeleine Lenski
- Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, MI, USA
| | - Peterson Haak
- Michigan Department of Health and Human Services, Lansing, MI, USA
| | - Nigel Paneth
- Department of Epidemiology and Biostatistics, College of Human Medicine, Michigan State University, East Lansing, MI, USA
- Department of Pediatrics and Human Development, College of Human Medicine, Michigan State University, East Lansing, MI, USA
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88
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Kuczynski AM, Kirton A, Semrau JA, Dukelow SP. Bilateral reaching deficits after unilateral perinatal ischemic stroke: a population-based case-control study. J Neuroeng Rehabil 2018; 15:77. [PMID: 30115093 PMCID: PMC6097295 DOI: 10.1186/s12984-018-0420-9] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2018] [Accepted: 07/31/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Detailed kinematics of motor impairment of the contralesional ("affected") and ipsilesional ("unaffected") limbs in children with hemiparetic cerebral palsy are not well understood. We aimed to 1) quantify the kinematics of reaching in both arms of hemiparetic children with perinatal stroke using a robotic exoskeleton, and 2) assess the correlation of kinematic reaching parameters with clinical motor assessments. METHODS This prospective, case-control study involved the Alberta Perinatal Stroke Project, a population-based research cohort, and the Foothills Medical Center Stroke Robotics Laboratory in Calgary, Alberta over a four year period. Prospective cases were collected through the Calgary Stroke Program and included term-born children with magnetic resonance imaging confirmed perinatal ischemic stroke and upper extremity deficits. Control participants were recruited from the community. Participants completed a visually guided reaching task in the KINARM robot with each arm separately, with 10 parameters quantifying motor function. Kinematic measures were compared to clinical assessments and stroke type. RESULTS Fifty children with perinatal ischemic stroke (28 arterial, mean age: 12.5 ± 3.9 years; 22 venous, mean age: 11.5 ± 3.8 years) and upper extremity deficits were compared to healthy controls (n = 147, mean age: 12.7 ± 3.9 years). Perinatal stroke groups demonstrated contralesional motor impairments compared to controls when reaching out (arterial = 10/10, venous = 8/10), and back (arterial = 10/10, venous = 6/10) with largest errors in reaction time, initial direction error, movement length and time. Ipsilesional impairments were also found when reaching out (arterial = 7/10, venous = 1/10) and back (arterial = 6/10). The arterial group performed worse than venous on both contralesional and ipsilesional parameters. Contralesional reaching parameters showed modest correlations with clinical measures in the arterial group. CONCLUSIONS Robotic assessment of reaching behavior can quantify complex, upper limb dysfunction in children with perinatal ischemic stroke. The ipsilesional, "unaffected" limb is often abnormal and may be a target for therapeutic interventions in stroke-induced hemiparetic cerebral palsy.
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Affiliation(s)
- Andrea M Kuczynski
- University of Calgary, Calgary, AB, T2N 2T9, Canada.,Section of Neurology, Department of Pediatrics, Alberta Children's Hospital Research Institute, Calgary, AB, Canada
| | - Adam Kirton
- University of Calgary, Calgary, AB, T2N 2T9, Canada.,Section of Neurology, Department of Pediatrics, Alberta Children's Hospital Research Institute, Calgary, AB, Canada.,Department of Clinical Neurosciences, Foothills Medical Centre, Hotchkiss Brain Institute, 1403 - 29th St. NW, Calgary, AB, Canada
| | - Jennifer A Semrau
- University of Calgary, Calgary, AB, T2N 2T9, Canada.,Department of Clinical Neurosciences, Foothills Medical Centre, Hotchkiss Brain Institute, 1403 - 29th St. NW, Calgary, AB, Canada
| | - Sean P Dukelow
- University of Calgary, Calgary, AB, T2N 2T9, Canada. .,Department of Clinical Neurosciences, Foothills Medical Centre, Hotchkiss Brain Institute, 1403 - 29th St. NW, Calgary, AB, Canada.
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89
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Dunbar M, Kirton A. Perinatal stroke: mechanisms, management, and outcomes of early cerebrovascular brain injury. THE LANCET CHILD & ADOLESCENT HEALTH 2018; 2:666-676. [PMID: 30119760 DOI: 10.1016/s2352-4642(18)30173-1] [Citation(s) in RCA: 105] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/16/2018] [Accepted: 05/17/2018] [Indexed: 12/24/2022]
Abstract
Perinatal stroke encompasses a heterogeneous group of focal neurological injuries early in brain development that probably affects more than 5 million people worldwide. Many such injuries are symptomatic in the first days of life, including neonatal arterial ischaemic stroke, cerebral sinovenous thrombosis, and neonatal haemorrhagic stroke. The remaining focal neurological injuries usually present later in the first year with motor asymmetry, such as arterial presumed perinatal ischaemic stroke, periventricular venous infarction, and presumed perinatal haemorrhagic stroke. The numerous sequelae of these injuries include hemiparesis (cerebral palsy), epilepsy, and cognitive, language, and behavioural challenges. In this Review we summarise each perinatal stroke disease, examining the epidemiology, pathophysiology, acute management, and outcomes, including the effect on parents and families, and emerging therapies to mitigate these lifelong morbidities.
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Affiliation(s)
- Mary Dunbar
- Department of Community Health Services, University of Calgary, Calgary, Alberta, Canada; Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, Alberta, Canada; Department of Radiology, Faculty of Medicine, University of Calgary, Calgary, Alberta, Canada; Department of Pediatrics, University of Calgary, Calgary, Alberta, Canada; Department of Clinical Neuroscience, University of Calgary, Calgary, Alberta, Canada; Alberta Children's Hospital Research Institute, Calgary, AB, Canada; Hotchkiss Brain Institute, Calgary, AB, Canada.
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90
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Tan AP, Svrckova P, Cowan F, Chong WK, Mankad K. Intracranial hemorrhage in neonates: A review of etiologies, patterns and predicted clinical outcomes. Eur J Paediatr Neurol 2018; 22:690-717. [PMID: 29731328 DOI: 10.1016/j.ejpn.2018.04.008] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2017] [Revised: 03/31/2018] [Accepted: 04/18/2018] [Indexed: 12/29/2022]
Abstract
Intracranial hemorrhage (ICH) in neonates often results in devastating neurodevelopmental outcomes as the neonatal period is a critical window for brain development. The neurodevelopmental outcomes in neonates with ICH are determined by the maturity of the brain, the location and extent of the hemorrhage, the specific underlying etiology and the presence of other concomitant disorders. Neonatal ICH may result from various inherited and acquired disorders. We classify the etiologies of neonatal ICH into eight main categories: (1) Hemorrhagic stroke including large focal hematoma, (2) Prematurity-related hemorrhage, (3) Bleeding diathesis, (4) Genetic causes, (5) Infection, (6) Trauma-related hemorrhage, (7) Tumor-related hemorrhage and (8) Vascular malformations. Illustrative cases showing various imaging patterns that can be helpful to predict clinical outcomes will be highlighted. Potential mimics of ICH in the neonatal period are also reviewed.
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Affiliation(s)
- Ai Peng Tan
- Department of Diagnostic Imaging, National University Health System, 1E Kent Ridge Rd 119228, Singapore.
| | - Patricia Svrckova
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London WC1N 3JH, UK.
| | - Frances Cowan
- Dept. of Neonatology, Chelsea and Westminster Hospital NHS Foundation Trust, Imperial College, London, SW10 9NH, UK.
| | - Wui Khean Chong
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London WC1N 3JH, UK.
| | - Kshitij Mankad
- Department of Radiology, Great Ormond Street Hospital NHS Foundation Trust, Great Ormond St, London WC1N 3JH, UK.
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91
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Yu S, Carlson HL, Mineyko A, Brooks BL, Kuczynski A, Hodge J, Dukelow S, Kirton A. Bihemispheric alterations in myelination in children following unilateral perinatal stroke. NEUROIMAGE-CLINICAL 2018; 20:7-15. [PMID: 29988959 PMCID: PMC6034585 DOI: 10.1016/j.nicl.2018.06.028] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Revised: 06/04/2018] [Accepted: 06/06/2018] [Indexed: 01/16/2023]
Abstract
Background Stroke is a leading cause of perinatal brain injury with variable outcomes including cerebral palsy and epilepsy. The biological processes that underlie these heterogeneous outcomes are poorly understood. Alterations in developmental myelination are recognized as a major determinant of outcome in preterm brain injury but have not been explored in perinatal stroke. We aimed to characterize myelination in hemiparetic children after arterial perinatal stroke, hypothesizing that ipsilesional myelination would be impaired, the degree of which would correlate with poor outcome. Methods Retrospective, controlled cohort study. Participants were identified through the Alberta Perinatal Stroke Project (APSP), a population-based research cohort (n > 400). Inclusion criteria were: 1) MRI-confirmed, unilateral arterial perinatal stroke, 2) T1-weighted MRI after 6 months of age, 3) absence of other neurological disorders, 4) neurological outcome that included at least one of the following tests - Pediatric Stroke Outcome Measure (PSOM), Assisting Hand Assessment (AHA), Melbourne Assessment (MA), neuropsychological evaluation (NPE), and robotic sensorimotor measurements. FreeSurfer software measured hemispheric asymmetry in myelination intensity (primary outcome). A second method using ImageJ software validated the detection of myelination asymmetry. A repeated measures ANOVA was used to compare perilesional, ipsilesional remote, and contralesional homologous region myelination between stroke cases and typically developing controls. Myelination metrics were compared to clinical outcome measures (t-test, Pearson's correlation). Results Twenty youth with arterial stroke (mean age: 13.4 ± 4.2yo) and 27 typically developing controls (mean age: 12.5 ± 3.7yo) were studied in FreeSurfer. Participants with stroke demonstrated lower myelination in the ipsilesional hemisphere (p < 0.0001). Myelination in perilesional regions had lower intensity compared to ipsilesional remote areas (p < .00001) and contralesional homologous areas (p < 0.00001). Ipsilesional remote regions had decreased myelination compared to homologous regions on the contralesional hemisphere (p = 0.016). Contralesional myelination was decreased compared to controls (p < 0.00001). Myelination metrics were not strongly associated with clinical motor, robotic sensorimotor, or neuropsychological outcomes though some complex tests requiring speeded responses had moderate effect sizes. Conclusion Myelination of apparently uninjured brain in both the ipsilesional and contralesional hemispheres is decreased after perinatal stroke. Differences appear to radiate outward from the lesion. Further study is needed to determine clinical significance. Myelination is altered in the lesioned hemisphere after perinatal stroke. The uninjured, contralesional hemisphere also demonstrates differences in myelination. Simple software can estimate MRI myelination abnormalities in children with perinatal brain injury.
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Affiliation(s)
- Sabrina Yu
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Helen L Carlson
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada; Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Aleksandra Mineyko
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada; Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Brian L Brooks
- Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada
| | - Andrea Kuczynski
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Jacquie Hodge
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada
| | - Sean Dukelow
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Calgary Pediatric Stroke Program, University of Calgary, Calgary, AB, Canada; Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada; Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB, Canada; Hotchkiss Brain Institute, University of Calgary, Calgary, AB, Canada.
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92
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Kuczynski AM, Dukelow SP, Hodge JA, Carlson HL, Lebel C, Semrau JA, Kirton A. Corticospinal tract diffusion properties and robotic visually guided reaching in children with hemiparetic cerebral palsy. Hum Brain Mapp 2018; 39:1130-1144. [PMID: 29193460 PMCID: PMC6866356 DOI: 10.1002/hbm.23904] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 10/01/2017] [Accepted: 11/22/2017] [Indexed: 12/20/2022] Open
Abstract
Perinatal stroke is the leading cause of hemiparetic cerebral palsy (CP), resulting in life-long disability. In this study, we examined the relationship between robotic upper extremity motor impairment and corticospinal tract (CST) diffusion properties. Thirty-three children with unilateral perinatal ischemic stroke (17 arterial, 16 venous) and hemiparesis were recruited from a population-based research cohort. Bilateral CSTs were defined using diffusion tensor imaging (DTI) and four diffusion metrics were quantified: fractional anisotropy (FA), mean (MD), radial (RD), and axial (AD) diffusivities. Participants completed a visually guided reaching task using the KINARM robot to define 10 movement parameters including movement time and maximum speed. Twenty-six typically developing children underwent the same evaluations. Partial correlations assessed the relationship between robotic reaching and CST diffusion parameters. All diffusion properties of the lesioned CST differed from controls in the arterial group, whereas only FA was reduced in the venous group. Non-lesioned CST diffusion measures were similar between stroke groups and controls. Both stroke groups demonstrated impaired reaching performance. Multiple reaching parameters of the affected limb correlated with lesioned CST diffusion properties. Lower FA and higher MD were associated with greater movement time. Few correlations were observed between non-lesioned CST diffusion and unaffected limb function though FA was associated with reaction time (R = -0.39, p < .01). Diffusion properties of the lesioned CST are altered after perinatal stroke, the degree of which correlates with specific elements of visually guided reaching performance, suggesting specific relevance of CST structural connectivity to clinical motor function in hemiparetic children.
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Affiliation(s)
- Andrea M. Kuczynski
- University of CalgaryCalgaryAlbertaCanada
- Section of Neurology, Department of PediatricsAlberta Children's HospitalCalgaryAlbertaCanada
| | - Sean P. Dukelow
- University of CalgaryCalgaryAlbertaCanada
- Department of Clinical NeurosciencesHotchkiss Brain InstituteCalgaryAlbertaCanada
| | - Jacquie A. Hodge
- Section of Neurology, Department of PediatricsAlberta Children's HospitalCalgaryAlbertaCanada
| | - Helen L. Carlson
- Section of Neurology, Department of PediatricsAlberta Children's HospitalCalgaryAlbertaCanada
| | - Catherine Lebel
- University of CalgaryCalgaryAlbertaCanada
- Department of RadiologyAlberta Children's HospitalCalgaryAlbertaCanada
| | - Jennifer A. Semrau
- University of CalgaryCalgaryAlbertaCanada
- Department of Clinical NeurosciencesHotchkiss Brain InstituteCalgaryAlbertaCanada
| | - Adam Kirton
- University of CalgaryCalgaryAlbertaCanada
- Section of Neurology, Department of PediatricsAlberta Children's HospitalCalgaryAlbertaCanada
- Department of Clinical NeurosciencesHotchkiss Brain InstituteCalgaryAlbertaCanada
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93
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Mühlbacher T, Bohner G, Bührer C, Dame C. Cerebellar Infarction: Unusual Manifestation with Facial Palsy, Focal Seizures, and Secondary Generalization. Neonatology 2018; 113:33-36. [PMID: 28946144 DOI: 10.1159/000480423] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/18/2017] [Indexed: 11/19/2022]
Abstract
BACKGROUND Cerebellar infarction is exceedingly rare in neonates, usually occurring after traumatic birth. Lifelong sequelae can result from cerebellar damage with disorders of motor function, ataxia, and also cognitive dysfunction. OBJECTIVES/METHODS We report the clinical presentation of a preterm triplet infant delivered by elective cesarean who showed peripheral facial palsy immediately after birth. RESULTS Tonic seizures with high-voltage discharges over the contralateral cerebral hemisphere and secondary generalization were successfully treated with phenobarbital. Transnuchal ultrasound through the foramen magnum and subsequent MRI examinations revealed infarction of the left cerebellar hemisphere. CONCLUSIONS In newborn infants, acute cerebellar stroke may have direct epileptogenic potential.
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Affiliation(s)
- Tobias Mühlbacher
- Department of Neonatology, Charité - Universitätsmedizin Berlin, Berlin, Germany
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94
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Changes in spectroscopic biomarkers after transcranial direct current stimulation in children with perinatal stroke. Brain Stimul 2017; 11:94-103. [PMID: 28958737 DOI: 10.1016/j.brs.2017.09.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 09/07/2017] [Accepted: 09/09/2017] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Perinatal stroke causes lifelong motor disability, affecting independence and quality of life. Non-invasive neuromodulation interventions such as transcranial direct current stimulation (tDCS) combined with intensive therapy may improve motor function in adult stroke hemiparesis but is under-explored in children. Measuring cortical metabolites with proton magnetic resonance spectroscopy (MRS) can inform cortical neurobiology in perinatal stroke but how these change with neuromodulation is yet to be explored. METHODS A double-blind, sham-controlled, randomized clinical trial tested whether tDCS could enhance intensive motor learning therapy in hemiparetic children. Ten days of customized, goal-directed therapy was paired with cathodal tDCS over contralesional primary motor cortex (M1, 20 min, 1.0 mA, 0.04 mA/cm2) or sham. Motor outcomes were assessed using validated measures. Neuronal metabolites in both M1s were measured before and after intervention using fMRI-guided short-echo 3T MRS. RESULTS Fifteen children [age(range) = 12.1(6.6-18.3) years] were studied. Motor performance improved in both groups and tDCS was associated with greater goal achievement. After cathodal tDCS, the non-lesioned M1 showed decreases in glutamate/glutamine and creatine while no metabolite changes occurred with sham tDCS. Lesioned M1 metabolite concentrations did not change post-intervention. Baseline function was highly correlated with lesioned M1 metabolite concentrations (N-acetyl-aspartate, choline, creatine, glutamate/glutamine). These correlations consistently increased in strength following intervention. Metabolite changes were not correlated with motor function change. Baseline lesioned M1 creatine and choline levels were associated with clinical response. CONCLUSIONS MRS metabolite levels and changes may reflect mechanisms of tDCS-related M1 plasticity and response biomarkers in hemiparetic children with perinatal stroke undergoing intensive neurorehabilitation.
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95
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Mineyko A, Kirton A. Neonatal arterial ischemic stroke: evidence required for future guidelines. Dev Med Child Neurol 2017; 59:892-893. [PMID: 28833052 DOI: 10.1111/dmcn.13489] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Aleksandra Mineyko
- Alberta Children's Hospital, Departments of Pediatrics and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
| | - Adam Kirton
- Alberta Children's Hospital, Departments of Pediatrics and Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Calgary, AB, Canada
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96
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Thrombophilia risk is not increased in children after perinatal stroke. Blood 2017; 129:2793-2800. [DOI: 10.1182/blood-2016-11-750893] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 02/20/2017] [Indexed: 11/20/2022] Open
Abstract
Key Points
Thrombophilia in children with perinatal stroke is rare, with rates similar to those in the normal population. Routine testing in childhood is not indicated.
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