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https://www.readbyqxmd.com/read/29031219/long-term-correlation-of-subthalamic-beta-band-activity-with-motor-impairment-in-patients-with-parkinson-s-disease
#1
Wolf-Julian Neumann, Franziska Staub-Bartelt, Andreas Horn, Julia Schanda, Gerd-Helge Schneider, Peter Brown, Andrea A Kühn
OBJECTIVES: To investigate the long term association of subthalamic beta activity with parkinsonian motor signs. METHODS: We recruited 15 patients with Parkinson's disease undergoing subthalamic DBS for local field potential recordings after electrode implantation, and at 3 and 8months post-operatively using the implantable sensing enabled Activa PC+S (Medtronic). Three patients dropped out leaving 12 patients. Recordings were conducted ON and OFF levodopa at rest...
September 20, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/29031049/heart-valve-scaffold-fabrication-bioinspired-control-of-macro-scale-morphology-mechanics-and-micro-structure
#2
Antonio D'Amore, Samuel K Luketich, Giuseppe M Raffa, Salim Olia, Giorgio Menallo, Antonino Mazzola, Flavio D'Accardi, Tamir Grunberg, Xinzhu Gu, Michele Pilato, Marina V Kameneva, Vinay Badhwar, William R Wagner
Valvular heart disease is currently treated with mechanical valves, which benefit from longevity, but are burdened by chronic anticoagulation therapy, or with bioprosthetic valves, which have reduced thromboembolic risk, but limited durability. Tissue engineered heart valves have been proposed to resolve these issues by implanting a scaffold that is replaced by endogenous growth, leaving autologous, functional leaflets that would putatively eliminate the need for anticoagulation and avoid calcification. Despite the diversity in fabrication strategies and encouraging results in large animal models, control over engineered valve structure-function remains at best partial...
October 6, 2017: Biomaterials
https://www.readbyqxmd.com/read/29029200/lateral-cerebellar-nucleus-stimulation-has-selective-effects-on-glutamatergic-and-gabaergic-perilesional-neurogenesis-after-cortical-ischemia-in-the-rodent-model
#3
Hugh H Chan, Jessica Cooperrider, Zhihong Chen, John T Gale, Kenneth B Baker, Connor A Wathen, Claire R Modic, Hyun-Joo Park, Andre G Machado
BACKGROUND: Chronic deep brain stimulation of the rodent lateral cerebellar nucleus (LCN) has been demonstrated to enhance motor recovery following cortical ischemia. This effect is concurrent with synaptogenesis and expression of long-term potentiation markers in the perilesional cerebral cortex. OBJECTIVE: To further investigate the cellular changes associated with chronic LCN stimulation in the ischemic rodent by examining neurogenesis along the cerebellothalamocortical pathway...
September 27, 2017: Neurosurgery
https://www.readbyqxmd.com/read/29028955/gamma-band-oscillations-preferential-for-nociception-can-be-recorded-in-the-human-insula
#4
Giulia Liberati, Anne Klöcker, Maxime Algoet, Dounia Mulders, Marta Maia Safronova, Susana Ferrao Santos, José-Géraldo Ribeiro Vaz, Christian Raftopoulos, André Mouraux
Transient nociceptive stimuli elicit robust phase-locked local field potentials (LFPs) in the human insula. However, these responses are not preferential for nociception, as they are also elicited by transient non-nociceptive vibrotactile, auditory, and visual stimuli. Here, we investigated whether another feature of insular activity, namely gamma-band oscillations (GBOs), is preferentially observed in response to nociceptive stimuli. Although nociception-evoked GBOs have never been explored in the insula, previous scalp electroencephalography and magnetoencephalography studies suggest that nociceptive stimuli elicit GBOs in other areas such as the primary somatosensory and prefrontal cortices, and that this activity could be closely related to pain perception...
September 25, 2017: Cerebral Cortex
https://www.readbyqxmd.com/read/29026048/spinal-cord-stimulation-for-chronic-non-cancer-pain-a-review-of-current-evidence-and-practice
#5
S Sc Wong, C W Chan, C W Cheung
Spinal cord stimulation provides analgesia through electrical stimulation of the dorsal column of the spinal cord via electrode leads placed into the epidural space. In traditional tonic stimulation, a painful sensation is replaced with paraesthesia. Spinal cord stimulation is effective in reducing neuropathic pain, enhancing function, and improving quality of life in different chronic pain conditions. Currently, there is most evidence to support its use for failed back surgery syndrome when multidisciplinary conventional management is unsuccessful...
October 2017: Hong Kong Medical Journal, Xianggang Yi Xue za Zhi
https://www.readbyqxmd.com/read/29024465/active-sites-intercalated-ultrathin-carbon-sheath-on-nanowire-arrays-as-integrated-core-shell-architecture-highly-efficient-and-durable-electrocatalysts-for-overall-water-splitting
#6
Jungang Hou, Yunzhen Wu, Shuyan Cao, Yiqing Sun, Licheng Sun
The development of active bifunctional electrocatalysts with low cost and earth-abundance toward oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) remains a great challenge for overall water splitting. Herein, metallic Ni4 Mo nanoalloys are firstly implanted on the surface of NiMoOx nanowires array (NiMo/NiMoOx ) as metal/metal oxides hybrid. Inspired by the superiority of carbon conductivity, an ultrathin nitrogen-doped carbon sheath intercalated NiMo/NiMoOx (NC/NiMo/NiMoOx ) nanowires as integrated core-shell architecture are constructed...
October 11, 2017: Small
https://www.readbyqxmd.com/read/29017400/minimally-invasive-method-to-activate-the-expiratory-muscles-to-restore-cough
#7
Anthony F DiMarco, Robert T Geertman, Kutaiba Tabbaa, Rebecca R Polito, Krzysztof E Kowalski
CONTEXT: Spinal cord stimulation (SCS) via disc electrodes surgically placed via laminotomy incisions has been shown to restore an effective cough in subjects with spinal cord injury (SCI). The purpose of this study was to evaluate a new method of expiratory muscle activation utilizing spinal cord wire leads, which can be implanted with minimally invasive techniques. METHODS: In a subject with SCI, parallel wire leads with two electrode contacts were inserted percutaneously through a needle, advanced to the T9, T11 spinal levels and connected to an implanted radiofrequency receiver...
October 11, 2017: Journal of Spinal Cord Medicine
https://www.readbyqxmd.com/read/29016950/hypersensitivity-to-material-and-environmental-burden-as-a-possible-cause-of-late-complications-of-cardiac-implantable-electronic-devices
#8
Jan Manoušek, Irena Andršová, Vera Stejskal, Jitka Vlašínová, Milan Sepši, Jan Kuta, Jana Klánová, Michal Mazík, Jirí Jarkovský, Lenka Šnajdrová, Klára Benešová, Tomáš Novotný, Andrea Zadáková, Jindrich Špinar
Aims: To evaluate whether patients with late complications of pacemakers or implantable cardioverter-defibrillators have hypersensitivity reactions to some of the materials used in generators or in electrodes, or to environmental metal burden. Methods and results: The cohort consisted of 20 men and 4 women (mean age: 62.3 ± 17.2 years) who had a history of late complications of implanted devices. The control group involved 25 men and 8 women (mean age: 64...
August 2, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/28993658/fast-charging-high-energy-lithium-ion-batteries-via-implantation-of-amorphous-silicon-nanolayer-in-edge-plane-activated-graphite-anodes
#9
Namhyung Kim, Sujong Chae, Jiyoung Ma, Minseong Ko, Jaephil Cho
As fast-charging lithium-ion batteries turn into increasingly important components in forthcoming applications, various strategies have been devoted to the development of high-rate anodes. However, despite vigorous efforts, the low initial Coulombic efficiency and poor volumetric energy density with insufficient electrode conditions remain critical challenges that have to be addressed. Herein, we demonstrate a hybrid anode via incorporation of a uniformly implanted amorphous silicon nanolayer and edge-site-activated graphite...
October 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28992760/-cochlear-view-plain-radiograph-a-simple-reliable-positioning-method
#10
Stephanie Elyse Ambrose, Norman Wendell Todd
INTRODUCTION: The plain 'cochlear view' radiograph for checking cochlear implant electrode coiling and depth of insertion is strongly influenced by positioning. The best accuracy and inter-observer agreement are achieved with the X-ray beam passing through the axis of the modiolus, which is perpendicular to the plane of the basal turn of the cochlea. The basal turn of the cochlea generally is 45 from the head's sagittal plane. OBJECTIVE: To describe a simple reliable technique of patient positioning to maximize the accuracy of postoperative radiographs in the evaluation of cochlear electrode insertion...
October 10, 2017: Cochlear Implants International
https://www.readbyqxmd.com/read/28990225/feasibility-of-diaphragm-pacing-in-patients-after-bilateral-lung-transplantation
#11
Dries Testelmans, Philippe Nafteux, Sophie Van Cromphaut, Bart Vrijsen, Robin Vos, Paul De Leyn, Herbert Decaluwé, Dirk Van Raemdonck, Geert M Verleden, Bertien Buyse
Recent animal studies and intra-operative studies in humans suggested that phrenic nerve stimulation could attenuate ventilator-induced diaphragm dysfunction. The purpose of the present study is to examine the safety and feasibility of diaphragm pacing during the weaning process after bilateral lung transplantation. Four patients, suffering from chronic pulmonary disease, were included, and diaphragm pacing was evaluated after lung transplantation. Implantation of electrodes at the end of the lung transplant procedure was possible in three of the four patients...
October 9, 2017: Clinical Transplantation
https://www.readbyqxmd.com/read/28988904/subcallosal-cingulate-deep-brain-stimulation-for-treatment-resistant-depression-a-multisite-randomised-sham-controlled-trial
#12
Paul E Holtzheimer, Mustafa M Husain, Sarah H Lisanby, Stephan F Taylor, Louis A Whitworth, Shawn McClintock, Konstantin V Slavin, Joshua Berman, Guy M McKhann, Parag G Patil, Barry R Rittberg, Aviva Abosch, Ananda K Pandurangi, Kathryn L Holloway, Raymond W Lam, Christopher R Honey, Joseph S Neimat, Jaimie M Henderson, Charles DeBattista, Anthony J Rothschild, Julie G Pilitsis, Randall T Espinoza, Georgios Petrides, Alon Y Mogilner, Keith Matthews, DeLea Peichel, Robert E Gross, Clement Hamani, Andres M Lozano, Helen S Mayberg
BACKGROUND: Deep brain stimulation (DBS) of the subcallosal cingulate white matter has shown promise as an intervention for patients with chronic, unremitting depression. To test the safety and efficacy of DBS for treatment-resistant depression, a prospective, randomised, sham-controlled trial was conducted. METHODS: Participants with treatment-resistant depression were implanted with a DBS system targeting bilateral subcallosal cingulate white matter and randomised to 6 months of active or sham DBS, followed by 6 months of open-label subcallosal cingulate DBS...
October 4, 2017: Lancet Psychiatry
https://www.readbyqxmd.com/read/28986415/clinical-outcomes-of-asleep-vs-awake-deep-brain-stimulation-for-parkinson-disease
#13
Matthew A Brodsky, Shannon Anderson, Charles Murchison, Mara Seier, Jennifer Wilhelm, Aaron Vederman, Kim J Burchiel
OBJECTIVE: To compare motor and nonmotor outcomes at 6 months of asleep deep brain stimulation (DBS) for Parkinson disease (PD) using intraoperative imaging guidance to confirm electrode placement vs awake DBS using microelectrode recording to confirm electrode placement. METHODS: DBS candidates with PD referred to Oregon Health & Science University underwent asleep DBS with imaging guidance. Six-month outcomes were compared to those of patients who previously underwent awake DBS by the same surgeon and center...
October 6, 2017: Neurology
https://www.readbyqxmd.com/read/28984807/decline-of-low-frequency-hearing-in-people-with-ski-slope-hearing-loss-implications-for-electrode-array-insertion
#14
Jasper Schuurbiers, Gertjan Dingemanse, Mick Metselaar
HYPOTHESIS: The decline of low-frequency hearing in people with ski-slope hearing loss varies and might depend on etiology. BACKGROUND: People with ski-sloping hearing loss might benefit from cochlear implantation with preservation of residual hearing. To reduce the risk of losing low-frequency hearing after implantation, the electrode-array can be inserted partially up to the desired frequency. That, however, obstructs electrical stimulation of lower frequencies...
October 4, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/28983444/vibrotactile-coordinated-reset-stimulation-for-the-treatment-of-neurological-diseases-concepts-and-device-specifications
#15
Peter A Tass
Coordinated reset stimulation (CRS) consists of spatiotemporal sequences of stimuli delivered to different sites in the brain. Computationally, it was shown that by achieving an unlearning of abnormal synaptic connectivity, CRS can cause a long-lasting reduction of pathological synchronization, a hallmark feature of Parkinson's disease and other brain disorders. Pre-clinical and proof of concept clinical studies in parkinsonian monkeys and patients showed that CRS applied through deep brain stimulation electrodes implanted in the subthalamic nucleus resulted in cumulative and long-lasting therapeutic effects along with a reduction of beta band oscillations...
August 2, 2017: Curēus
https://www.readbyqxmd.com/read/28982125/social-partnering-alters-sleep-in-fear-conditioned-wistar-rats
#16
Jamie K DaSilva, Eram Husain, Yanlin Lei, Graziella L Mann, Adrian R Morrison, Shanaz Tejani-Butt
Social support, when provided following a traumatic experience, is associated with a lower incidence of stress-related psychiatric disorders. Our hypothesis was that providing a social interaction period with a naive conspecific would improve sleep architecture in response to cued fear conditioning in Wistar rats. Rats were randomly assigned to either the socially isolated or socially partnered groups. Rats assigned to the socially isolated group were individually housed following electrode implantation and fear conditioning...
2017: PloS One
https://www.readbyqxmd.com/read/28980700/occipital-nerve-stimulation-for-medically-refractory-chronic-paroxysmal-hemicrania
#17
Sarah Miller, Susie Lagrata, Laurence Watkins, Manjit Matharu
OBJECTIVE: To describe the outcome of a patient with refractory chronic paroxysmal hemicrania (CPH) to occipital nerve stimulation (ONS). BACKGROUND: CPH is a primary headache disorder exquisitely sensitive to indomethacin. In patients unable to tolerate indomethacin, the therapeutic options are limited. ONS is a promising therapy for other refractory headache conditions. We report the first patient with medically refractory CPH treated with ONS. METHODS: Following implantation of the occipital nerve stimulator in 2006, the patient kept prospective headache diaries...
October 5, 2017: Headache
https://www.readbyqxmd.com/read/28978234/the-hippocampus-and-amygdala-are-integrators-of-neocortical-influence-a-cortico-cortical-evoked-potential-study
#18
Pierre Mégevand, David M Groppe, Stephan Bickel, Manuel R Mercier, Matthew S Goldfinger, Corey J Keller, Laszlo Entz, Ashesh D Mehta
Brain stimulation is increasingly viewed as an effective approach to treat neuropsychiatric disease. The brain's organization in distributed networks suggests that the activity of a remote brain structure could be modulated by stimulating cortical areas that strongly connect to the target. Most connections between cerebral areas are asymmetric, and a better understanding of the relative direction of information flow along connections could improve the targeting of stimulation to influence deep brain structures...
October 5, 2017: Brain Connectivity
https://www.readbyqxmd.com/read/28975677/sacral-neuromodulation-standardized-electrode-placement-technique
#19
Klaus E Matzel, Emmanuel Chartier-Kastler, Charles H Knowles, Paul A Lehur, Arantxa Muñoz-Duyos, Carlo Ratto, Mona B Rydningen, Michael Sørensen, Philip van Kerrebroeck, Stefan de Wachter
INTRODUCTION: Sacral neuromodulation (SNM) (sacral nerve stimulation SNS) has become an established therapy for functional disorders of the pelvic organs. Despite its overall success, the therapy fails in a proportion of patients. This may be partially due to inadequate electrode placement with suboptimal coupling of the electrode and nerve. Based on these assumptions the technique of sacral spinal neuromodulation has been redefined. All descriptions relate to the only currently available system licensed for all pelvic indications (Medtronic Interstim(®) )...
October 4, 2017: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/28973406/targeting-accuracy-of-the-subthalamic-nucleus-in-deep-brain-stimulation-surgery-comparison-between-3-t-t2-weighted-magnetic-resonance-imaging-and-microelectrode-recording-results
#20
Andreas Nowacki, Ines Debove, Michael Fiechter, Frédéric Rossi, Markus Florian Oertel, Roland Wiest, Michael Schüpbach, Claudio Pollo
BACKGROUND: Targeting accuracy in deep brain stimulation (DBS) surgery can be defined as the level of accordance between selected and anatomic real target reflected by characteristic electrophysiological results of microelectrode recording (MER). OBJECTIVE: To determine the correspondence between the preoperative predicted target based on modern 3-T magnetic resonance imaging (MRI) and intraoperative MER results separately on the initial and consecutive second side of surgery...
August 2, 2017: Operative Neurosurgery (Hagerstown, Md.)
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