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https://www.readbyqxmd.com/read/29026673/endoscopic-management-of-a-cavernous-malformation-on-the-floor-of-third-ventricle-and-aqueduct-of-sylvius-technical-case-report-and-review-of-the-literature
#1
Luis Alberto Ortega-Porcayo, Alexander Perdomo-Pantoja, Isaac Jair Palacios-Ortíz, Salomon Cohen Cohen, Juan Pablo González-Mosqueda, Juan Luis Gómez-Amador
BACKGROUND: Intraventricular cavernous malformations are unusual intracranial vascular malformations; their deep anatomical location complicates their surgical management. Microsurgical approaches are the gold standard approaches for the resection of ventricular lesions, however, they imply considerable neurovascular risks. CASE DESCRIPTION: A 51-year-old patient presented with acute headache, diplopia, vertigo, blurred vision, and a depressed level of consciousness...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29026661/tenth-case-of-bilateral-hemifacial-spasm-treated-by-microvascular-decompression-review-of-the-pathophysiology
#2
REVIEW
Warley Carvalho da Silva Martins, Lucas Alverne Freitas de Albuquerque, Gervásio Teles Cardoso de Carvalho, Jules Carlos Dourado, Marcos Dellaretti, Atos Alves de Sousa
BACKGROUND: Bilateral hemifacial spasm (BHFS) is a rare neurological syndrome whose diagnosis depends on excluding other facial dyskinesias. We present a case of BHFS along with a literature review. METHODS: A 64-year-old white, hypertense male reported involuntary left hemiface contractions in 2001 (aged 50). In 2007, right hemifacial symptoms appeared, without spasm remission during sleep. Botulinum toxin type A application produced partial temporary improvement...
2017: Surgical Neurology International
https://www.readbyqxmd.com/read/29025023/-why-do-i-feel-this-pain-b-mode-and-power-doppler-ultrasound-found-the-answer-a-neurovascular-conflict
#3
Giulia Piccinini, Daniele Coraci, Fabio Lodispoto, Chiara Cambise, Silvia Giovannini, Luca Padua
No abstract text is available yet for this article.
August 12, 2017: Pain Medicine: the Official Journal of the American Academy of Pain Medicine
https://www.readbyqxmd.com/read/29021987/spatial-variation-in-the-hemoglobin-phase-of-oxygenation-and-deoxygenation-in-the-developing-cortex-of-infants
#4
Gentaro Taga, Hama Watanabe, Fumitaka Homae
Spontaneous low-frequency oscillatory changes in oxygenated hemoglobin (oxy-Hb) and deoxygenated hemoglobin (deoxy-Hb) are observed using functional near-infrared spectroscopy (fNIRS). A previous study showed that the time-averaged phase difference between oxy-Hb and deoxy-Hb changes, referred to as hemoglobin phase of oxygenation and deoxygenation (hPod), is sensitive to the development of the cortex. We examined phase-locking index of hPod, referred to as [Formula: see text], in addition to hPod, in neonates and 3- and 6-month-old infants using the 94-channel fNIRS data, which covered large lateral regions of the cortex...
January 2018: Neurophotonics
https://www.readbyqxmd.com/read/29021986/integrated-treatment-modality-of-cathodal-transcranial-direct-current-stimulation-with-peripheral-sensory-stimulation-affords-neuroprotection-in-a-rat-stroke-model
#5
Yu-Hang Liu, Su Jing Chan, Han-Chi Pan, Aishwarya Bandla, Nicolas K K King, Peter Tsun Hon Wong, You-Yin Chen, Wai Hoe Ng, Nitish V Thakor, Lun-De Liao
Cathodal-transcranial direct current stimulation induces therapeutic effects in animal ischemia models by preventing the expansion of ischemic injury during the hyperacute phase of ischemia. However, its efficacy is limited by an accompanying decrease in cerebral blood flow. On the other hand, peripheral sensory stimulation can increase blood flow to specific brain areas resulting in rescue of neurovascular functions from ischemic damage. Therefore, the two modalities appear to complement each other to form an integrated treatment modality...
October 2017: Neurophotonics
https://www.readbyqxmd.com/read/29021878/displaced-supracondylar-humerus-fractures-in-children-are-they-all-identical
#6
S K Gera, McH Tan, Y G Lim, Kbl Lim
Introduction: This study aims to ascertain if there are any differences in supracondylar fractures between children under seven years of age and those above 7 years of age. Materials and Methods: All cases of displaced humerus supracondylar fractures that required surgical stabilization were identified and retrospectively reviewed. Demographic data, mode of injury, associated neurovascular injuries and details of surgery performed were obtained from clinical records. The Gartland classification and the extent of comminution of fractures were also documented from review of radiographs...
July 2017: Malaysian Orthopaedic Journal
https://www.readbyqxmd.com/read/29021168/functional-ultrasound-imaging-of-brain-activity-in-human-newborns
#7
Charlie Demene, Jérome Baranger, Miguel Bernal, Catherine Delanoe, Stéphane Auvin, Valérie Biran, Marianne Alison, Jérome Mairesse, Elisabeth Harribaud, Mathieu Pernot, Mickael Tanter, Olivier Baud
Functional neuroimaging modalities are crucial for understanding brain function, but their clinical use is challenging. Recently, the use of ultrasonic plane waves transmitted at ultrafast frame rates was shown to allow for the spatiotemporal identification of brain activation through neurovascular coupling in rodents. Using a customized flexible and noninvasive headmount, we demonstrate in human neonates that real-time functional ultrasound imaging (fUSI) is feasible by combining simultaneous continuous video-electroencephalography (EEG) recording and ultrafast Doppler (UfD) imaging of the brain microvasculature...
October 11, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/29020717/ulnar-nerve-injury-on-removal-of-a-contraceptive-implant
#8
Eva E O'Grady, Dominic M Power
The close proximity of contraceptive implant placement to the course of the ulnar nerve can result in injury. Several factors have been implicated in this complication including: low BMI, erroneous placement of the implant, implantation over the brachial groove, and migration of the implant from its original insertion. Clinicians should familiarise themselves with the vulnerable neurovascular structures in the area and refer promptly to a specialist if any neurological symptoms develop during placement or removal of these devices...
December 2016: Practitioner
https://www.readbyqxmd.com/read/29018233/altered-neurovascular-coupling-as-measured-by-optical-imaging-a-biomarker-for-alzheimer-s-disease
#9
Konstantin Kotliar, Christine Hauser, Marion Ortner, Claudia Muggenthaler, Janine Diehl-Schmid, Susanne Angermann, Alexander Hapfelmeier, Christoph Schmaderer, Timo Grimmer
Neurovascular coupling can be directly assessed by retinal vessel response to flickering light using optical imaging methods. The response is altered in a number of ocular and cardiovascular diseases. Whether it is altered in Alzheimer's disease (AD) is investigated. Retinal vessel reaction to monochromatic flicker stimulation was examined by Dynamic Vessel Analyzer independent of the commercial software in elderly subjects: 15 patients with mild-to-moderate dementia due to AD (ADD); 24 patients with mild cognitive impairment due to AD (MCI); 15 cognitively healthy controls (HC)...
October 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29017302/cervical-pedicle-screw-placement-using-medial-funnel-technique
#10
Jung Hwan Lee, Byung Kwan Choi, In Ho Han, Won Gyu Choi, Kyoung Hyup Nam, Hwan Soo Kim
OBJECTIVE: Cervical pedicle screw (CPS) placement is very challenging due to high risk of neurovascular complications. We devised a new technique (medial funnel technique) to improve the accuracy and feasibility of CPS placement. METHODS: We reviewed 28 consecutive patients undergoing CPS instrumentation using the medial funnel technique. Their mean age was 51.4 years (range, 30-81 years). Preoperative diagnosis included degenerative disease (n=5), trauma (n=22), and infection (n=1)...
September 2017: Korean Journal of Spine
https://www.readbyqxmd.com/read/28993018/functional-correlates-of-the-position-of-the-axis-of-rotation-of-the-mandible-during-chewing-in-non-human-primates
#11
Jose Iriarte-Diaz, Claire E Terhune, Andrea B Taylor, Callum F Ross
The location of the axis of rotation (AoR) of the mandible was quantified using the helical axis (HA) in eight individuals from three species of non-human primates: Papio anubis, Cebus apella, and Macaca mulatta. These data were used to test three hypotheses regarding the functional significance of anteroposterior condylar translation - an AoR located inferior to the temporomandibular joint (TMJ) - during chewing: minimizing impingement of the gonial region on cervical soft tissue structures during jaw opening; avoiding stretching of the inferior alveolar neurovascular bundle (IANB); and increasing jaw-elevator muscle torques...
August 23, 2017: Zoology: Analysis of Complex Systems, ZACS
https://www.readbyqxmd.com/read/28990533/blood-brain-barrier-disruption-leads-to-postoperative-cognitive-dysfunction
#12
Bin Wang, Siyuan Li, Xipeng Cao, Xinghui Dou, Jingzhu Li, Ling Wang, Mingshan Wang, Yanlin Bi
BACKGROUND: Postoperative cognitive dysfunction (POCD) has received considerable attention as one of the main postoperative complications. The underlying mechanism of POCD in elderly subjects has not been fully elucidated to date. The central nervous system (CNS) is isolated from the bloodstream by the blood brain barrier (BBB) that consists of endothelial cells, capillary blood vessels and the tight junctions. The tight junctions carry out significant biological functions that are associated with the CNS and the blood circulation...
October 9, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28989151/-application-of-pie-crusting-the-medial-collateral-ligament-release-in-arthroscopic-surgery-for-posterior-horn-of-%C3%A2-medial-meniscus-in-knee-joint
#13
Weihong Zhu, Qi Tang, Lele Liao, Ding Li, Yang Yang, You Chen
To explore the effectiveness and safety of pie-crusting the medial collateral ligament release (MCL) in treating posterior horn of medial meniscus (PHMM) tear in tight medial tibiofemoral compartment of knee joint.
 Methods: Thirty-two consecutive patients with PHMM tear in tight medial tibiofemoral compartment of knee joint were admitted to our department from January, 2013 to December, 2014. All patients were performed pie-crusting the MCL release at its tibial insertion with 18-gauge intravenous needle...
September 28, 2017: Zhong Nan da Xue Xue Bao. Yi Xue Ban, Journal of Central South University. Medical Sciences
https://www.readbyqxmd.com/read/28987927/blood-brain-barrier-dysfunction-and-recovery-after-ischemic-stroke
#14
REVIEW
Xiaoyan Jiang, Anuska V Andjelkovic, Ling Zhu, Tuo Yang, Michael V L Bennett, Jun Chen, Richard F Keep, Yejie Shi
The blood-brain barrier (BBB) plays a vital role in regulating the trafficking of fluid, solutes and cells at the blood-brain interface and maintaining the homeostatic microenvironment of the CNS. Under pathological conditions, such as ischemic stroke, the BBB can be disrupted, followed by the extravasation of blood components into the brain and compromise of normal neuronal function. This article reviews recent advances in our knowledge of the mechanisms underlying BBB dysfunction and recovery after ischemic stroke...
October 5, 2017: Progress in Neurobiology
https://www.readbyqxmd.com/read/28987827/surgical-management-of-giant-intracranial-meningioma-operative-nuances-challenges-and-outcome
#15
Vinayak Narayan, Shyamal C Bir, Nasser Mohammed, Amey R Savardekar, Devi Prasad Patra, Anil Nanda
INTRODUCTION: The giant intracranial meningioma [GIM] constitutes a different spectrum of brain tumors which invade the vital neurovascular structures and makes the primary mode of treatment, surgery, a technically challenging one. The surgery of GIM is unique due to its large size, prominent vascularity, entangling and limited visualisation of various neurovascular structures and severe cerebral edema. The study reports the authors surgical experience of 80 GIM cases, the operative challenges and surgical outcome...
October 5, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28986948/the-role-of-the-blood-brain-barrier-in-hypertension
#16
Anthony Setiadi, Willian S Korim, Khalid Elsaafien, Song T Yao
The blood-brain barrier (BBB) is a critical barrier that provides both metabolic and physical protection to an immune-privileged central nervous system. The BBB has been shown to be disrupted in hypertension. This review addresses the importance of the BBB in maintaining homeostasis in the context of diseases related to autonomic dysfunction such as hypertension. We highlight the potentially important roles of the immune system and neurovascular unit in the maintenance of the BBB, whereby dysregulation may lead to autonomic dysfunction in diseases such as heart failure and hypertension...
October 6, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/28986230/machine-learning-and-neurosurgical-outcome-prediction-a-systematic-review
#17
REVIEW
Joeky T Senders, Patrick C Staples, Aditya V Karhade, Mark M Zaki, William B Gormley, Marike L D Broekman, Timothy R Smith, Omar Arnaout
OBJECTIVE: Accurate measurement of surgical outcomes is highly desirable to optimize surgical decision-making. An important element of surgical decision making is identification of the patient cohort that will benefit from surgery prior to the intervention. Machine learning (ML) enables computers to learn from previous data to make accurate predictions on new data. In this systematic review, we evaluate the potential of ML for neurosurgical outcome prediction. METHODS: A systematic search in the Pubmed and Embase databases was performed to identify all potential relevant studies up to January 1, 2017...
October 3, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28986176/diffuse-gliomas-exhibit-whole-brain-impaired-cerebrovascular-reactivity
#18
Jorn Fierstra, Christiaan van Niftrik, Marco Piccirelli, Oliver Bozinov, Athina Pangalu, Niklaus Krayenbühl, Antonios Valavanis, Michael Weller, Luca Regli
PURPOSE: Cerebral diffuse gliomas exhibit perilesional impaired cerebrovascular reactivity (CVR), yet the degree of impairment as well as its full spatial extent in the brain remains unknown. With quantitative fMRI, we studied twelve subjects with untreated brain diffuse glioma and twelve healthy controls to assess CVR impairment and determine its distribution throughout the brain. METHODS: In a prospective case-control study, quantitative CVR measurements were derived from BOLD fMRI volumes during standardized iso-oxic changes in carbon dioxide...
October 3, 2017: Magnetic Resonance Imaging
https://www.readbyqxmd.com/read/28985935/limitations-of-resting-state-functional-mr-imaging-in-the-setting-of-focal-brain-lesions
#19
REVIEW
Shruti Agarwal, Haris I Sair, Jay J Pillai
Methods of image acquisition and analysis for resting-state functional MR imaging (rsfMR imaging) are still evolving. Neurovascular uncoupling and susceptibility artifact are important confounds of rsfMR imaging in the setting of focal brain lesions such as brain tumors. This article reviews the detection of these confounds using rsfMR imaging metrics in the setting of focal brain lesions. In the near future, with the wide range of ongoing research in rsfMR imaging, these issues likely will be overcome and will open new windows into brain function and connectivity...
November 2017: Neuroimaging Clinics of North America
https://www.readbyqxmd.com/read/28985657/the-orbit-as-seen-through-different-surgical-windows-extensive-anatomosurgical-study
#20
Antonio Bernardo, Alexander I Evins, Pier Paolo Mattogno, Monica Quiroga, Brad E Zacharia
A thorough understanding of the orbit, structures within it, and complex spatial relationships among these structures bears relevance in a variety of neurosurgical cases. We describe the 3-dimensional surgical anatomy of the orbit and fragile and complex network of neurovascular architectures, flanked by a series of muscular and glandular structures, found within the orbital dura.
October 2017: World Neurosurgery
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