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https://www.readbyqxmd.com/read/27915104/petroclival-meningiomas-remaining-controversies-in-light-of-minimally-invasive-approaches
#1
REVIEW
Sâmia Yasin Wayhs, Guilherme Alves Lepski, Leonardo Frighetto, Gustavo Rassier Isolan
Surgical resection of petroclival meningiomas remains challenging due to their deep location and relationship to vital neurovascular structures. Although the natural history of these tumors involves a slow course, the incidence of cranial nerve deficits and the extent of tumor resection vary widely in the literature. Some reviews on this topic have been conducted, but data remain fragmentary and based on retrospective case series, which hinders attempts at meta-analysis. Within this context, research into the use of minimally invasive approaches, including in neuroendoscopy, continues to emerge...
November 29, 2016: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/27913152/development-and-validation-of-an-objective-scoring-tool-for-robot-assisted-radical-prostatectomy-prostatectomy-assessment-and-competency-evaluation-pace
#2
Ahmed A Hussein, Khurshid R Ghani, James Peabody, Richard Sarle, Ronney Abaza, Daniel Eun, Jim Hu, Michael Fumo, Brian Lane, Jeffrey Montgomery, Nobuyuki Hinata, Deborah Rooney, Bryan Comstock, Hei Kit Chan, Sridhar S Mane, James L Mohler, Gregory Wilding, David Miller, Khurshid A Guru
INTRODUCTION: and Background: Comprehensive training and skill acquisition by urologic surgeons are vital to optimize surgical outcomes and patient safety. We sought to develop and validate an objective and procedure specific tool to assess the quality of robot-assisted radical prostatectomy (RARP)-Prostatectomy Assessment and Competence Evaluation (PACE) METHODS: Development and content validation of PACE was performed by deconstruction of RARP into seven key domains utilizing the Delphi methodology...
November 29, 2016: Journal of Urology
https://www.readbyqxmd.com/read/27911239/microvascular-decompression-of-the-cochleovestibular-nerve-for-treatment-of-tinnitus-and-vertigo-a-systematic-review-and-meta-analysis-of-individual-patient-data
#3
Minke J C van den Berge, J Marc C van Dijk, Iris A Posthumus, Nynke Smidt, Pim van Dijk, Rolien H Free
OBJECTIVE Microvascular decompression (MVD) is regarded as a valid treatment modality in neurovascular conflicts (NVCs) causing, for example, trigeminal neuralgia and hemifacial spasms. An NVC of the cochleovestibular nerve might cause tinnitus and/or vertigo; however, general acceptance of MVD for this indication is lacking. The aim of this study was to investigate the effectiveness, safety, and prognostic factors for success of MVD of the cochleovestibular nerve. METHODS A systematic review and meta-analysis of individual patient data (IPD) were conducted according to the Preferred Reporting Items for Systematic Reviews and Meta-Analyses and Individual Patient Data (PRISMA-IPD) guidelines...
December 2, 2016: Journal of Neurosurgery
https://www.readbyqxmd.com/read/27908788/time-to-wake-up-studying-neurovascular-coupling-and-brain-wide-circuit-function-in-the-un-anesthetized-animal
#4
REVIEW
Yu-Rong Gao, Yuncong Ma, Qingguang Zhang, Aaron T Winder, Zhifeng Liang, Lilith Antinori, Patrick J Drew, Nanyin Zhang
Functional magnetic resonance imaging (fMRI) has allowed the noninvasive study of task-based and resting-state brain dynamics in humans by inferring neural activity from blood-oxygenation-level dependent (BOLD) signal changes. An accurate interpretation of the hemodynamic changes that underlie fMRI signals depends on the understanding of the quantitative relationship between changes in neural activity and changes in cerebral blood flow, oxygenation and volume. While there has been extensive study of neurovascular coupling in anesthetized animal models, anesthesia causes large disruptions of brain metabolism, neural responsiveness and cardiovascular function...
November 28, 2016: NeuroImage
https://www.readbyqxmd.com/read/27903813/abnormal-neurovascular-coupling-during-status-epilepticus-migrainosus-in-sturge-weber-syndrome
#5
Moksh Sethi, Magdalena A Kowalczyk, Linda J Dalic, John S Archer, Graeme D Jackson
No abstract text is available yet for this article.
November 30, 2016: Neurology
https://www.readbyqxmd.com/read/27903637/spatial-scale-and-distribution-of-neurovascular-signals-underlying-decoding-of-orientation-and-eye-of-origin-from-fmri-data
#6
Jonas Larsson, Charlotte Harrison, Jade Jackson, Seung-Mock Oh, Vaida Zeringyte
Multivariate pattern analysis of functional MRI (fMRI) data is widely used, yet the spatial scales and origin of neurovascular signals underlying such analyses remain unclear. We compared decoding performance for stimulus orientation and eye-of-origin from fMRI measurements in human visual cortex with predictions based on the columnar organisation of each feature, and estimated the spatial scales of patterns driving decoding. Both orientation and eye-of-origin could be decoded significantly above chance in early visual areas (V1-V3)...
November 30, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27903281/improving-the-clinical-management-of-traumatic-brain-injury-through-the-pharmacokinetic-modeling-of-peripheral-blood-biomarkers
#7
Aaron Dadas, Jolewis Washington, Nicola Marchi, Damir Janigro
BACKGROUND: Blood biomarkers of neurovascular damage are used clinically to diagnose the presence severity or absence of neurological diseases, but data interpretation is confounded by a limited understanding of their dependence on variables other than the disease condition itself. These include half-life in blood, molecular weight, and marker-specific biophysical properties, as well as the effects of glomerular filtration, age, gender, and ethnicity. To study these factors, and to provide a method for markers' analyses, we developed a kinetic model that allows the integrated interpretation of these properties...
November 30, 2016: Fluids and Barriers of the CNS
https://www.readbyqxmd.com/read/27901327/stem-cell-therapy-for-sequestering-neuroinflammation-in-traumatic-brain-injury-an-update-on-exosome-targeting-to-the-spleen
#8
Marci G Crowley, Michael G Liska, Cesar V Borlongan
Traumatic brain injury (TBI), manifests with acute and chronic cell death pathways leading to initial impacted injury and subsequent neurodegeneration. In particular, the secondary cell death, plagued by a massive and lingering neuroinflammatory response, contributes significantly to worsening outcomes of the progressive TBI pathology. Fortunately, neuroinflammation also provides an opportunity for therapeutic interventions. Limited treatment options currently exist for the disease, but stem cell-based therapies offer promise in promoting neuroprotection and neuroregeneration by mitigating central neuroinflammation as well as modulating peripheral inflammation via the spleen...
November 30, 2016: Journal of Neurosurgical Sciences
https://www.readbyqxmd.com/read/27900714/is-there-asymmetry-between-the-concave-and-convex-pedicles-in-adolescent-idiopathic-scoliosis-a-ct-investigation
#9
Colin M Davis, Caroline A Grant, Mark J Pearcy, Geoffrey N Askin, Robert D Labrom, Maree T Izatt, Clayton J Adam, J Paige Little
BACKGROUND: Adolescent idiopathic scoliosis is a complex three-dimensional deformity of the spine characterized by deformities in the sagittal, coronal, and axial planes. Spinal fusion using pedicle screw instrumentation is a widely used method for surgical correction in severe (coronal deformity, Cobb angle > 45°) adolescent idiopathic scoliosis curves. Understanding the anatomic difference in the pedicles of patients with adolescent idiopathic scoliosis is essential to reduce the risk of neurovascular or visceral injury through pedicle screw misplacement...
November 29, 2016: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/27900344/neurovascular-coupling-develops-alongside-neural-circuits-in-the-postnatal-brain
#10
COMMENT
Mariel G Kozberg, Elizabeth M C Hillman
In the adult brain, increases in local neural activity are accompanied by increases in regional blood flow. This relationship between neural activity and hemodynamics is termed neurovascular coupling and provides the blood flow-dependent contrast detected in functional magnetic resonance imaging (fMRI). Neurovascular coupling is commonly assumed to be consistent and reliable from birth; however, numerous studies have demonstrated markedly different hemodynamics in the early postnatal brain. Our recent study in J...
2016: Neurogenesis (Austin, Tex.)
https://www.readbyqxmd.com/read/27900340/retropatellar-accessory-portals-for-improved-access-to-the-patella-anatomic-description-and-evaluation-of-safety
#11
Jason L Koh, Anthony L Logli
BACKGROUND: Standard knee arthroscopy portals are frequently used to address retropatellar chondral pathology. Alternative portals may offer a safe and simple substitute, particularly when reaching the base of deep lesions is required. PURPOSE: To describe and assess the safety of accessory retropatellar portals. STUDY DESIGN: Descriptive laboratory study. METHODS: An anatomic study was performed on 10 fresh-frozen cadaveric knees...
November 2016: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/27897381/pathologic-fracture-in-childhood-and-adolescent-osteosarcoma-a-single-institution-experience
#12
Lindsay Haynes, Sue C Kaste, Kirsten K Ness, Jianrong Wu, Lucia Ortega-Laureano, Michael Bishop, Michael Neel, Bhaskar Rao, Israel Fernandez-Pineda
PURPOSE: Pathologic fractures occur in 5-10% of pediatric osteosarcoma (OS) cases and have historically been considered a contraindication to limb salvage. Our purpose was to describe the radiographic features of pathologic fracture and examine its impact on local recurrence rates, functional outcomes, and overall survival. METHODS: We retrospectively analyzed patients at our institution from 1990 to 2015 with pathologic fracture at diagnosis or during neoadjuvant chemotherapy...
November 5, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27897128/defining-the-limits-of-endoscopic-access-to-internal-auditory-canal
#13
Adam Master, Mickie Hamiter, Maura Cosetti
OBJECTIVE: To quantify surgical access to the internal auditory canal (IAC) using an exclusively endoscopic transcanal approach (EETA) and investigate surgically relevant relationships with neurovascular and osseous landmarks of the temporal bone. MATERIALS AND METHODS: Anatomical dissection of two paired temporal bones and 15 unpaired temporal bones was performed using an exclusively endoscopic approach to IAC. The dissection proceeded until the cerebellopontine angle (CPA) could be accessed...
November 28, 2016: Journal of International Advanced Otology
https://www.readbyqxmd.com/read/27895367/two-incision-mini-open-carpal-tunnel-release-a-minimally-invasive-alternative-to-endoscopic-release
#14
Pervaiz Mehmood Hashmi, Rizwan Haroon Rashid, Moiz Ali, Yasir Mohib, Naveed Baloch
Surgical techniques for carpal tunnel release are constantly evolving to reduce complications. This retrospective study was planned to identify the outcome and complications associated with a new operating technique for release of carpal tunnel using two incisions. It was conducted at the Aga Khan University Hospital, Karachi, and comprised patients undergoing surgical release of carpal tunnel syndrome (CTS) between January 2011 and December 2014. Of the 54 patients,38(70.4%) cases were of right-sided CTS. The mean operating time was 12...
October 2016: JPMA. the Journal of the Pakistan Medical Association
https://www.readbyqxmd.com/read/27894893/the-blood-brain-barrier-in-alzheimer-s-disease
#15
REVIEW
A Chakraborty, N M de Wit, W M van der Flier, H E de Vries
Alzheimer's disease (AD) is the most common form of dementia, affecting millions of people worldwide. One of the prominent causative factors of AD pathogenesis is cerebral vascular dysfunction, which results in diminished cerebral perfusion. Moreover, due to the loss of the protective function of the blood-brain barrier (BBB), impaired clearance of excess neurotoxic amyloid beta (Aβ) occurs, causing vascular perturbation and diminished cognitive functioning. The relationship between the prevalence of AD and vascular risk factors is complex and not fully understood...
November 25, 2016: Vascular Pharmacology
https://www.readbyqxmd.com/read/27893636/facial-contouring-by-targeted-restoration-of-facial-fat-compartment-volume-the-mid-face
#16
Wenjin Wang, Yun Xie, Ru-Lin Huang, Jia Zhou, Herrler Tanja, Peijuan Zhao, Chen Cheng, Sizheng Zhou, Lee L Q Pu, Qingfeng Li
BACKGROUND: Recent anatomical findings have suggested that facial fat distribution is complex and changes with age. Here, we developed a grafting technique based on the physiological distribution and volume changes of facial fat compartments to achieve a youthful and natural-looking face. METHODS: Forty cadaveric hemifaces were used for the dissection of fat compartments and neurovascular structures in the mid-face area. Seventy-eight patients were treated for cheek atrophy using our targeted restoration of mid-face fat compartment volume...
November 21, 2016: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/27891612/neurovascular-mechanisms-underlying-augmented-cold-induced-reflex-cutaneous-vasoconstriction-in-human-hypertension
#17
Jody L Greaney, W Larry Kenney, Lacy M Alexander
Despite ample evidence of dysregulated sympathetic control of the peripheral vasculature in hypertension, no studies have examined integrated neurovascular function during cold stress in hypertensive adults (HTN). We hypothesized that (1) whole-body cooling would elicit greater cutaneous vasoconstriction and greater increases in skin sympathetic nervous system activity (SSNA) in HTN (n = 14; 56 ± 2 yrs) compared to age-matched normotensive adults (NTN; n = 14; 55 ± 2 yrs) and (2) augmented reflex vasoconstriction in HTN would be mediated by an increase in cutaneous vascular adrenergic sensitivity and a greater contribution of non-adrenergic sympathetic co-transmitters...
November 28, 2016: Journal of Physiology
https://www.readbyqxmd.com/read/27891034/the-anatomical-perspective-of-human-occipital-condyle-in-relation-to-the-hypoglossal-canal-condylar-canal-and-jugular-foramen-and-its-surgical-significance
#18
Ranjana Verma, Shalini Kumar, Arpita Mahajan Rai, Iqra Mansoor, Raj D Mehra
BACKGROUND: The transcondylar approach (TCA) has gained importance in recent era which enables shorter and direct route to access the lesions ventral to the brainstem. The important step in this approach is resection of the occipital condyle (OC). The detailed knowledge of bony anatomy of OC and its relation to the hypoglossal canal (HC), condylar canal (CC), and jugular foramen (JF) is very important to avoid any iatrogenic injury during craniovertebral surgeries. The aim of the present study is to conduct a morphometric and morphological study and note the variations of the OC and the structures surrounding it in North Indian population...
October 2016: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/27891029/craniovertebral-junction-360%C3%A2-a-combined-microscopic-and-endoscopic-anatomical-study
#19
Sukhdeep Singh Jhawar, Maximiliano Nunez, Paolo Pacca, Daniel Seclen Voscoboinik, Huy Truong
OBJECTIVES: Craniovertebral junction (CVJ) can be approached from various corridors depending on the location and extent of disease. A three-dimensional understanding of anatomy of CVJ is paramount for safe surgery in this region. Aim of this cadaveric study is to elucidate combined microscopic and endoscopic anatomy of critical neurovascular structures in this area in relation to bony and muscular landmarks. MATERIALS AND METHODS: Eight fresh-frozen cadaveric heads injected with color silicon were used for this study...
October 2016: Journal of Craniovertebral Junction and Spine
https://www.readbyqxmd.com/read/27890758/surgical-outcome-of-patients-with-very-small-intracranial-aneurysms-a-single-center-experience-from-southern-iran
#20
Abdolkarim Rahmanian, Fariborz Ghaffarpasand, Nima Derakhshan
OBJECTIVES: To report the surgical outcome of very small intracranial aneurysms (VSIAs; ≤3mm) in a large referral neurovascular center in Southern Iran. METHODS: This cross-sectional study was conducted in Southern Iran during a6-year period between 2010 and 2016. We included all the patients with VSIAs (≤3mm) who underwent surgery in our center. All the patients were operated by a single neurosurgeon. Pre- and postoperative CT angiography, intraoperative imaging with indo-cyanine green video angiography was performed in all the cases...
November 24, 2016: World Neurosurgery
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