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https://www.readbyqxmd.com/read/29171800/chiari-related-scoliosis-a-single-center-experience-with-long-term-radiographic-follow-up-and-relationship-to-deformity-correction
#1
Vijay M Ravindra, Kaine Onwuzulike, Robert S Heller, Robert Quigley, John Smith, Andrew T Dailey, Douglas L Brockmeyer
OBJECTIVE Previous reports have addressed the short-term response of patients with Chiari-related scoliosis (CRS) to suboccipital decompression and duraplasty (SODD); however, the long-term behavior of the curve has not been well defined. The authors undertook a longitudinal study of a cohort of patients who underwent SODD for CRS to determine whether there are factors related to Chiari malformation (CM) that predict long-term scoliotic curve behavior and need for deformity correction. METHODS The authors retrospectively reviewed cases in which patients underwent SODD for CRS during a 14-year period at a single center...
November 24, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/29170980/from-electromyographic-activity-to-frequency-modulation-in-zebra-finch-song
#2
Juan F Döppler, Alan Bush, Franz Goller, Gabriel B Mindlin
Behavior emerges from the interaction between the nervous system and peripheral devices. In the case of birdsong production, a delicate and fast control of several muscles is required to control the configuration of the syrinx (the avian vocal organ) and the respiratory system. In particular, the syringealis ventralis muscle is involved in the control of the tension of the vibrating labia and thus affects the frequency modulation of the sound. Nevertheless, the translation of the instructions (which are electrical in nature) into acoustical features is complex and involves nonlinear, dynamical processes...
November 23, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/29145838/mri-characteristics-for-phantom-scratching-in-canine-syringomyelia
#3
Zoe R Nalborczyk, Angus K McFadyen, Jelena Jovanovik, Anna Tauro, Colin J Driver, Noel Fitzpatrick, Susan P Knower, Clare Rusbridge
BACKGROUND: A classic sign of canine syringomyelia (SM) is scratching towards one shoulder. Using magnetic resonance imaging (MRI) we investigate the spinal cord lesion relating to this phenomenon which has characteristics similar to fictive scratch secondary to spinal cord transection. Medical records were searched for Cavalier King Charles spaniels with a clinical and MRI diagnosis of symptomatic SM associated with Chiari-like malformation (CM). The cohort was divided into SM with phantom scratching (19 dogs) and SM but no phantom scratching (18 dogs)...
November 16, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29125433/a-points-based-algorithm-for-prognosticating-clinical-outcome-of-chiari-malformation-type-i-with-syringomyelia-results-from-a-predictive-model-analysis-of-82-surgically-managed-adult-patients
#4
Sumit Thakar, Laxminadh Sivaraju, Kuruthukulangara S Jacob, Aditya Atal Arun, Saritha Aryan, Dilip Mohan, Narayanam Anantha Sai Kiran, Alangar S Hegde
OBJECTIVE Although various predictors of postoperative outcome have been previously identified in patients with Chiari malformation Type I (CMI) with syringomyelia, there is no known algorithm for predicting a multifactorial outcome measure in this widely studied disorder. Using one of the largest preoperative variable arrays used so far in CMI research, the authors attempted to generate a formula for predicting postoperative outcome. METHODS Data from the clinical records of 82 symptomatic adult patients with CMI and altered hindbrain CSF flow who were managed with foramen magnum decompression, C-1 laminectomy, and duraplasty over an 8-year period were collected and analyzed...
November 10, 2017: Journal of Neurosurgery. Spine
https://www.readbyqxmd.com/read/29096983/chiari-malformation-may-increase-perivascular-cerebrospinal-fluid-flow-into-the-spinal-cord-a-subject-specific-computational-modelling-study
#5
Robert A Lloyd, David F Fletcher, Elizabeth C Clarke, Lynne E Bilston
Syringomyelia is associated with Chiari I malformation, although the mechanistic link is unclear. Studies have suggested that cerebrospinal fluid enters the spinal cord via the perivascular spaces, and that changes in the timing of the subarachnoid pressures may increase flow into the spinal cord. This study aims to determine how Chiari malformation and syringomyelia alter the subarachnoid space pressures and hence perivascular flow. Subject-specific models of healthy controls (N = 9), Chiari patients with (N = 7) and without (N = 8) syringomyelia, were developed from magnetic resonance imaging (MRI), to simulate the subarachnoid pressures...
October 25, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29021676/-stealth-cranioplasty-a-novel-endeavor-for-symptomatic-adult-chiari-i-patients-with-syringomyelia-technical-note-appraisal-and-philosophical-considerations
#6
Asifur Rahman, Md Sumon Rana, Paawan Bahadur Bhandari, Dewan Shamsul Asif, Abu Naim Wakil Uddin, Abu Saleh Mohammad Abu Obaida, Md Atikur Rahman, Md Shamsul Alam
AIM AND OBJECTIVE: In this article, we describe a novel technique of reconstruction of posterior fossa by cranioplasty with use of preshaped titanium mesh following posterior fossa decompression (PFD) for Chiari malformation type I (CMI) with syringomyelia (SM) in symptomatic adults. MATERIALS AND METHODS: Eleven patients underwent limited PFD and expansive cranioplasty with preshaped titanium mesh, what we term as "Stealth Cranioplasty" (SCP), following arachnoid preserving duraplasty (APD) and hexagonal tenting of the duraplasty with the cranioplasty (HTDC) for the management of symptomatic adult CMI with SM...
July 2017: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/29017977/syrinx-to-subarachnoid-shunting-for-syringomyelia
#7
Keryn Davidson, Jeffrey M Rogers, Marcus A Stoodley
OBJECTIVE: Surgery for syringomyelia generally aims to treat the underlying cause, if it is known. Optimal management is unclear for idiopathic syringomyelia, or where treatment of the putative cause has failed or is high risk. Syrinx to subarachnoid shunting is an option for these cases; a series is reported to assess the outcomes of this approach. METHODS: We retrospectively analysed the clinical and radiological features of a consecutive series of patients with syringomyelia treated with syrinx to subarachnoid shunting...
October 7, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28923147/idiopathic-syringomyelia-in-a-military-helicopter-pilot
#8
Anthony Schiemer
BACKGROUND: A syrinx is a fluid-filled cavity within the spinal cord. They can lead to a variety of symptoms, including limb weakness and back pain. Incidental finding of syringomyelia provides a challenge for clinicians due to the wide variety of possible symptoms. In military aviation, neurological findings in pilots can result in extensive investigation that can lead to potentially invasive management. Conversely, the potential for chronic progression of a spinal syrinx and subsequent neurological deterioration makes early identification critical...
October 1, 2017: Aerospace Medicine and Human Performance
https://www.readbyqxmd.com/read/28920082/is-a-persistent-central-canal-a-risk-factor-for-neurological-injury-in-patients-undergoing-surgical-correction-of-scoliosis
#9
Steven Kyriacou, Yuen Man, Karen Plumb, Matthew Shaw, Kia Rezajooi
BACKGROUND: Scoliosis patients with associated syringomyelia are at an increased risk of neurological injury during surgical deformity correction. The syrinx is therefore often addressed surgically prior to scoliosis correction to minimize this risk. It remains unclear if the presence of a persistent central canal (PCC) within the spinal cord also poses a similar risk. The aim of this study is to determine whether there is any evidence to suggest that patients with a PCC are also at a higher risk of neurological injury during surgical scoliosis correction...
2017: Scoliosis and Spinal Disorders
https://www.readbyqxmd.com/read/28900151/in-situ-vocal-fold-properties-and-pitch-prediction-by-dynamic-actuation-of-the-songbird-syrinx
#10
Daniel N Düring, Benjamin J Knörlein, Coen P H Elemans
The biomechanics of sound production forms an integral part of the neuromechanical control loop of avian vocal motor control. However, we critically lack quantification of basic biomechanical parameters describing the vocal organ, the syrinx, such as material properties of syringeal elements, forces and torques exerted on, and motion of the syringeal skeleton during song. Here, we present a novel marker-based 3D stereoscopic imaging technique to reconstruct 3D motion of servo-controlled actuation of syringeal muscle insertions sites in vitro and focus on two muscles controlling sound pitch...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28899831/acquired-chiari-i-malformation-with-syringomyelia-secondary-to-colloid-cyst-with-hydrocephalus-case-report-and-review-of-literature
#11
Amit Kumar Thotakura, Nageswara R Marabathina
INTRODUCTION: Acquired Chiari malformation and associated syringomyelia have been previously described following lumbar puncture/drainage, lumboperitoneal shunts, and spontaneous CSF leakage. In addition to these etiologies, space-occupying lesions such as meningiomas, epidermoid cysts, medulloblastomas, and arachnoid cysts are rare causes of acquired Chiari malformation and syringomyelia. We report a rare case of colloid cyst with hydrocephalus causing secondary Chiari malformation with syringomyelia...
September 9, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28885133/the-addition-of-duraplasty-to-posterior-fossa-decompression-in-the-surgical-treatment-of-pediatric-chiari-malformation-type-i-a-systematic-review-and-meta-analysis-of-surgical-and-performance-outcomes
#12
REVIEW
Victor M Lu, Kevin Phan, Sean P Crowley, David J Daniels
OBJECTIVE Surgery is the definitive treatment of Chiari malformation Type I (CM-I). It involves posterior fossa decompression, which can be performed along with C-1 laminectomy, reconstructive duraplasty, or tonsil shrinkage. The aim of this study was to provide an updated systematic review and meta-analysis of the latest available evidence regarding posterior fossa decompression only (PFDO) versus posterior fossa decompression with duraplasty (PFDD) in the treatment of CM-I in children. METHODS A literature search was performed in compliance with the PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines for article identification, screening, eligibility, and inclusion...
November 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28868156/post-traumatic-syringomyelia-with-holocord-involvement-a-case-report
#13
Idris Amin, Gavriil Ilizarov, Nayeema Chowdhury, Shailaja Kalva
INTRODUCTION: Syringomyelia is a disorder in which a cyst, or syrinx, develops within the spinal cord. Historically, syringomyelia in post-traumatic spinal cord injury has been uncommon; however, its diagnosis has been increasing due to the advances in medical technology. Syringomyelia that involves the entire spinal cord, or holocord, is rare after traumatic spinal cord injury, with only a few cases reported in the literature. CASE PRESENTATION: We present a case of a 57-year-old male who had a motorcycle accident 30 years ago resulting in a spinal cord injury, who presented a rapid decline in the function of his left upper extremity...
2017: Spinal Cord Series and Cases
https://www.readbyqxmd.com/read/28844366/syringomyelia-associated-with-cervical-spondylotic-myelopathy-causing-canal-stenosis-a-rare-association
#14
Dirk Pillich, Ehab El Refaee, Jan-Uwe Mueller, Amr Safwat, Henry W S Schroeder, Joerg Baldauf
BACKGROUND: Although cervical spondylosis is extremely common, only few cases with associated syrinx have been reported. Depending on review of two large data bases, we report this case series. In addition, we evaluated the posterior decompression as the management option in treatment of this rare condition. MATERIALS AND METHODS: Data of all cases with cervical spondylosis and canal stenosis that sought medical advice or needed decompressive laminectomy/laminoplasty between the years 2006 and 2015 were checked in manually...
August 14, 2017: Neurologia i Neurochirurgia Polska
https://www.readbyqxmd.com/read/28842236/treatment-of-syringomyelia-in-patients-with-arachnoiditis-at-the-craniocervical-junction
#15
Christopher L Davidoff, Shinuo Liu, Johnny H Y Wong, Stavros Koustais, Jeffrey M Rogers, Marcus A Stoodley
OBJECTIVE: Craniocervical junction arachnoiditis (CCJA) is an uncommon cause of syringomyelia. The pathophysiology of syrinx formation is uncertain, and the appropriate management unclear. A series of cases is reported to demonstrate variations in etiology, uniformity of functional cerebrospinal fluid obstruction at the foramen magnum, and results of surgical intervention. METHODS: We retrospectively analyzed the clinical and radiologic features of a consecutive series of patients treated for syringomyelia related to CCJA...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28838117/technique-for-mini-open-decompression-of-chiari-type-i-malformation-in-adults
#16
Peyman Pakzaban
BACKGROUND: The technique for decompression of Chiari type I malformation relies on open exposure of craniocervical junction for suboccipital craniectomy and upper cervical laminectomy with or without duraplasty. There is no detailed technical report of a minimally invasive approach for Chiari decompression in adults. OBJECTIVE: To describe a mini-open technique for decompression of Chiari type I malformation (including duraplasty) in adults. METHODS: Six consecutive adult patients with symptomatic Chiari type I malformation underwent decompression through a 3 to 4 cm midline incision via a speculum retractor...
August 1, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28807779/syringo-subarachnoid-shunt-for-the-treatment-of-persistent-syringomyelia-following-decompression-for-chiari-type-i-malformation-surgical-results
#17
Jehuda Soleman, Jonathan Roth, Andrea Bartoli, Daniel Rosenthal, Akiva Korn, Shlomi Constantini
BACKGROUND: Approximately 30% of patients treated by foramen magnum decompression (FMD) for Chiari I-associated-syringomyelia will show persistence, recurrence, or progression of the syrinx. OBJECTIVE: This study evaluates the clinical and radiological outcome of syringo-subarachnoid shunt (SSS) as the treatment for persistent syringomyelia after FMD. METHODS: Data was collected retrospectively. The primary outcome measurement was neurological function (assessed with the Modified Japanese Orthopedic Association (mJOA) scale)...
August 11, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28804041/cell-therapy-as-a-new-approach-to-the-treatment-of-posttraumatic-syringomyelia
#18
Jesús Vaquero, Rasha Hassan, Cecilia Fernández, Gregorio Rodríguez-Boto, Mercedes Zurita
BACKGROUND: Cell transplantation with autologous bone marrow-derived mesenchymal stromal cells (MSCs) seems to be a therapeutic promise for patients with established spinal cord injury, achieving improvement in their quality of life, but there is no experience with the application of this type of cell therapy in patients suffering posttraumatic syringomyelia. OBJECTIVE: To study the possible utility of cell therapy with autologous MSCs in posttraumatic syringomyelia...
November 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28799016/intraparenchymal-intracranial-pressure-monitoring-for-hydrocephalus-and-cerebrospinal-fluid-disorders
#19
Aswin Chari, Debayan Dasgupta, Alexander Smedley, Claudia Craven, Edward Dyson, Samir Matloob, Simon Thompson, Lewis Thorne, Ahmed K Toma, Laurence Watkins
BACKGROUND: Elective intraparenchymal intracranial pressure (ICP) monitoring is useful for the diagnosis and treatment of hydrocephalus and cerebrospinal fluid (CSF) disorders. This retrospective study analyzes median ICP and pulse amplitude (PA) recordings in neurosurgically naïve patients undergoing elective ICP monitoring for suspected CSF disorders. METHODS: Retrospective review of prospectively collated database of neurosurgically naïve patients undergoing elective ICP monitoring for suspected hydrocephalus and CSF disorders...
October 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28768878/controllable-biomimetic-birdsong
#20
Aryesh Mukherjee, Shreyas Mandre, L Mahadevan
Birdsong is the product of the controlled generation of sound embodied in a neuromotor system. From a biophysical perspective, a natural question is that of the difficulty of producing birdsong. To address this, we built a biomimetic syrinx consisting of a stretched simple rubber tube through which air is blown, subject to localized mechanical squeezing with a linear actuator. A large static tension on the tube and small dynamic variations in the localized squeezing allow us to control transitions between three states: a quiescent state, a periodic state and a solitary wave state...
August 2017: Journal of the Royal Society, Interface
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