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https://www.readbyqxmd.com/read/29223000/bilateral-preictal-signature-of-phase-amplitude-coupling-in-canine-epilepsy
#1
Laura Gagliano, Elie Bou Assi, Dang K Nguyen, Sandy Rihana, Mohamad Sawan
Seizure forecasting would improve the quality of life of patients with refractory epilepsy. Although early findings were optimistic, no single feature has been found capable of individually characterizing brain dynamics during transition to seizure. Cross-frequency phase amplitude coupling has been recently proposed as a precursor of seizure activity. This work evaluates the existence of a statistically significant difference in mean phase amplitude coupling distribution between the preictal and interictal states of seizures in dogs with bilaterally implanted intracranial electrodes...
November 26, 2017: Epilepsy Research
https://www.readbyqxmd.com/read/29221321/living-related-lung-transplantation
#2
REVIEW
Hiroshi Date
Living-donor lobar lung transplantation (LDLLT) was developed to deal with the severe shortage of brain dead door for patients who would not survive the long waiting period. In standard LDLLT, right and left lower lobes removed from two healthy donors are implanted into a recipient after right and left pneumonectomies using cardiopulmonary bypass (CPB). The number of LDLLT has decreased in the USA due to the recent change in allocation system for cadaveric donor lungs. For the past several years, most of the reports on LDLLT have been from Japan, where the average waiting time for a cadaveric lung is exceeding 800 days...
September 2017: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29220192/fluidic-microactuation-of-flexible-electrodes-for-neural-recording
#3
Flavia Vitale, Daniel Vercosa, Alexander V Rodriguez, Sushma Sri Pamulapati, Frederik Seibt, Eric Lewis, Jiaxi Stephen Yan, Krishna Badhiwala, Mohammed Adnan, Gianni Royer-Carfagni, Michael Beierlein, Caleb Kemere, Matteo Pasquali, Jacob Robinson
Soft and conductive nanomaterials like carbon nanotubes, graphene, and nanowire scaffolds have expanded the family of ultra-flexible microelectrodes that can bend and flex with the natural movement of the brain, reduce the inflammatory response and improve the stability of long-term neural recordings. However, current methods to implant these highly flexible electrodes rely on temporary stiffening agents that temporarily increase the electrode size and stiffness thus aggravating neural damage during implantation, which can lead to cell loss and glial activation that persists even after the stiffening agents are removed or dissolve...
December 8, 2017: Nano Letters
https://www.readbyqxmd.com/read/29216719/prevalent-placement-error-of-deep-brain-stimulation-electrode-in-movement-disorders-technical-considerations
#4
M Kloc, Z Kosutzka, J Steno, P Valkovic
BACKGROUND: Deep brain stimulation is an effective and safe technique. Displacement of the electrode relative to the optimal stimulation site can lead to insufficient effect and sometimes to the need of operative electrode re-position. OBJECTIVE: This study was aimed to analyse targeting accuracy of deep brain stimulation electrode implantation to subthalamic nucleus (STN) and globus pallidus internus (Gpi). It detected possible causes of inaccuracy and prevalent shift to certain direction...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/29215830/-study-of-migration-and-distribution-of-bone-marrow-cells-transplanted-animals-with-b16-melanoma
#5
A F Poveshchenko, A O Solovieva, K E Zubareva, D N Strunkin, O B Gricyk, O V Poveshchenko, A V Shurlygina, V I Konenkov
Purpose. Reveal features migration and distribution of syngeneic bone marrow cells (BMC) and subpopulations (MSC) after transplantation into the recipient carrier B16 melanoma bodies. Methods. We used mouse male and female C57BL/6 mice. Induction of Tumor Growth: B16 melanoma cells implanted subcutaneously into right hind paw of female C57BL/6 mice at a dose of 2.5 x 105 cells / mouse. migration study in vivo distribution and BMC and MSC was performed using genetic markers - Y-chromosome specific sequence line male C57Bl/6 syngeneic intravenous transplantation in females using the polymerase chain reaction (PCR) in real time on Authorized Termal Cycler - Light Cycler 480 II / 96 (Roche)...
April 2017: Patologicheskaia Fiziologiia i èksperimental'naia Terapiia
https://www.readbyqxmd.com/read/29215082/the-myokinetic-control-interface-tracking-implanted-magnets-as-a-means-for-prosthetic-control
#6
S Tarantino, F Clemente, D Barone, M Controzzi, C Cipriani
Upper limb amputation deprives individuals of their innate ability to manipulate objects. Such disability can be restored with a robotic prosthesis linked to the brain by a human-machine interface (HMI) capable of decoding voluntary intentions, and sending motor commands to the prosthesis. Clinical or research HMIs rely on the interpretation of electrophysiological signals recorded from the muscles. However, the quest for an HMI that allows for arbitrary and physiologically appropriate control of dexterous prostheses, is far from being completed...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29210950/a-prospective-study-of-pain-from-magnetic-resonance-imaging-with-cochlear-implant-magnets-in-situ
#7
Seth E Pross, Bryan K Ward, Jeffrey D Sharon, Heather M Weinreich, Nafi Aygun, Howard W Francis
OBJECTIVE: To describe changes in pain associated with magnetic resonance imaging (MRI) with cochlear implant magnets in place. STUDY DESIGN: Prospective, single-arm study. SETTING: Tertiary referral center. SUBJECTS: Adults with cochlear implants requiring MRI. INTERVENTION: Tight head wrapping over internal device during MRI. MAIN OUTCOME MEASURES: Change in pain score using an 11-point visual analogue scale, duration/completion of MRI, body mass index (BMI), quality of pain, status of the skin, functioning of implant, displacement/polarity change of magnet, willingness to repeat MRI without magnet removal...
November 28, 2017: Otology & Neurotology
https://www.readbyqxmd.com/read/29205748/cosmetic-tourism-for-breast-augmentation-a-systematic-review
#8
REVIEW
Louise Brightman, Sze Ng, Susannah Ahern, Rodney Cooter, Ingrid Hopper
BACKGROUND: The medical tourism industry, and in particular cosmetic tourism for breast augmentation, is becoming an increasingly popular global phenomenon. The objective of this study is to determine the extent of medical literature and the patient risk profiles associated with cosmetic tourism for breast augmentation both locally and abroad. DATA SOURCES: OVID MEDLINE, OVID Embase, Cochrane Central and Proquest electronic databases. METHODS: The search was conducted through to April 2017...
December 3, 2017: ANZ Journal of Surgery
https://www.readbyqxmd.com/read/29205169/potential-for-thermal-damage-to-the-blood-brain-barrier-during-craniotomy-procedure-implications-for-intracortical-recording-microelectrodes
#9
Andrew Shoffstall, Jennifer Paiz, David Miller, Griffin Rial, Mitchell Willis, Dhariyat Menendez, Stephen Hostler, Jeffrey R Capadona
Our objective was to determine how readily blood-brain barrier (BBB) disruption occurred as a result of bone drilling during a craniotomy to implant microelectrodes in rat cortex. While the phenomenon of heat production during bone-drilling is well-known, practices to evade damage to the underlying brain tissue are inconsistently practiced and reported in the literature. Approach: We conducted a review of intracortical microelectrode literature to summarize typical approaches to mitigate drill heating during rodent craniotomies...
December 5, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/29204424/3-d-bioprinting-of-neural-tissue-for-applications-in-cell-therapy-and-drug-screening
#10
REVIEW
Michaela Thomas, Stephanie M Willerth
Neurodegenerative diseases affect millions of individuals in North America and cost the health-care industry billions of dollars for treatment. Current treatment options for degenerative diseases focus on physical rehabilitation or drug therapies, which temporarily mask the effects of cell damage, but quickly lose their efficacy. Cell therapies for the central nervous system remain an untapped market due to the complexity involved in growing neural tissues, controlling their differentiation, and protecting them from the hostile environment they meet upon implantation...
2017: Frontiers in Bioengineering and Biotechnology
https://www.readbyqxmd.com/read/29203409/nanoelectronics-enabled-chronic-multimodal-neural-platform-in-a-mouse-ischemic-model
#11
Lan Luan, Colin T Sullender, Xue Li, Zhengtuo Zhao, Hanlin Zhu, Xiaoling Wei, Chong Xie, Andrew K Dunn
BACKGROUND: Despite significant advancements of optical imaging techniques for mapping hemodynamics in small animal models, it remains challenging to combine imaging with spatially resolved electrical recording of individual neurons especially for longitudinal studies. This is largely due to the strong invasiveness to the living brain from the penetrating electrodes and their limited compatibility with longitudinal imaging. NEW METHOD: We implant arrays of ultraflexible nanoelectronic threads (NETs) in mice for neural recording both at the brain surface and intracortically, which maintain great tissue compatibility chronically...
December 1, 2017: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/29202327/mesh-electronics-a-new-paradigm-for-tissue-like-brain-probes
#12
REVIEW
Guosong Hong, Xiao Yang, Tao Zhou, Charles M Lieber
Existing implantable neurotechnologies for understanding the brain and treating neurological diseases have intrinsic properties that have limited their capability to achieve chronically-stable brain interfaces with single-neuron spatiotemporal resolution. These limitations reflect what has been dichotomy between the structure and mechanical properties of living brain tissue and non-living neural probes. To bridge the gap between neural and electronic networks, we have introduced the new concept of mesh electronics probes designed with structural and mechanical properties such that the implant begins to 'look and behave' like neural tissue...
December 1, 2017: Current Opinion in Neurobiology
https://www.readbyqxmd.com/read/29202131/multifunctional-system-for-observing-measuring-and-analyzing-stimulation-evoked-neurochemical-signaling
#13
Christopher J Kimble, Joshua B Boesche, Diane R Eaker, Kenneth R Kressin, James K Trevathan, Seungleal Paek, Anders J Asp, Malcolm B McIntosh, J Luis Lujan
The ability to measure neurotransmitter activity using implanted electrochemical sensors offers researchers a potent technique for analyzing neural activity across specific neural circuitry. We have developed a wirelessly controlled device, WINCS Harmoni, to observe and measure neurotransmitter dynamics at up to four separate sensors, with high temporal and spatial resolution. WINCS Harmoni also incorporates a versatile neurostimulator that can be synchronized with electrochemical recording. The WINCS Harmoni platform is thus optimally suited for probing the neurochemical effects of neurostimulation, and may in turn enable the development of personalized therapies for multiple brain disorders...
May 2017: IEEE International Symposium on Medical Measurements and Applications: Proceedings
https://www.readbyqxmd.com/read/29201041/decoding-of-human-movements-based-on-deep-brain-local-field-potentials-using-ensemble-neural-networks
#14
Mohammad S Islam, Khondaker A Mamun, Hai Deng
Decoding neural activities related to voluntary and involuntary movements is fundamental to understanding human brain motor circuits and neuromotor disorders and can lead to the development of neuromotor prosthetic devices for neurorehabilitation. This study explores using recorded deep brain local field potentials (LFPs) for robust movement decoding of Parkinson's disease (PD) and Dystonia patients. The LFP data from voluntary movement activities such as left and right hand index finger clicking were recorded from patients who underwent surgeries for implantation of deep brain stimulation electrodes...
2017: Computational Intelligence and Neuroscience
https://www.readbyqxmd.com/read/29199226/imaging-of-sialidase-activity-and-its-clinical-application
#15
Takashi Suzuki
Sialidase releases sialic acid residues from the ends of sugar chains. The sialidases are involved in many physiological processes including cell differentiation and proliferation and immune function as well as pathophysiological conditions such as various human cancers and infections. Therefore visualization of sialidase activities with high sensitivity could provide valuable insights into these isozyme's activity. We developed novel fluorescent sialidase substrates, 2-benzothiazol-2-yl-phenol derivatives-based N-acetylneuraminic acid (Neu5Ac) (BTP-Neu5Ac) substrates, for highly sensitive and specific visualization of sialidase activity in living mammalian tissues and virus-infected cells...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29198041/ethical-considerations-on-novel-neuronal-interfaces
#16
Kadircan H Keskinbora, Kader Keskinbora
Wireless powered implants, each smaller than a grain of rice, have the potential to scan and stimulate brain cells. Further research may lead to next-generation brain-machine interfaces for controlling prosthetics, exoskeletons, and robots, as well as "electroceuticals" to treat disorders of the brain and body. In conditions that can be particularly alleviated with brain stimulation, the use of such mini devices may pose certain challenges. Health professionals are becoming increasingly more accountable in decision-making processes that have impacts on the life quality of individuals...
December 2, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29196249/deep-brain-stimulation-for-essential-tremor-a-comparison-of-targets
#17
Joost A H Holslag, Nienke Neef, Martijn Beudel, Gea Drost, D L Marinus Oterdoom, Naomi I Kremer, Teus van Laar, J Marc C van Dijk
INTRODUCTION: Deep Brain Stimulation (DBS) is an established treatment for refractory Essential Tremor (ET). Initially, the target of choice was the thalamic Ventral Inter Mediate nucleus (VIM). However, the Zona Incerta (ZI) has been put forward as a superior target. Both targets are considered safe and effective, but a direct comparison between these targets is lacking. METHODS: We analyzed a single-center cohort of 44 ET-patients treated with DBS between 1998 and 2017, targeting the VIM and/or ZI...
November 28, 2017: World Neurosurgery
https://www.readbyqxmd.com/read/29193449/characterization-of-glioblastoma-in-an-orthotopic-mouse-model-with-magnetic-resonance-elastography
#18
Katharina Schregel, Navid Nazari, Michal O Nowicki, Miklos Palotai, Sean E Lawler, Ralph Sinkus, Paul E Barbone, Samuel Patz
Glioblastoma (GBM) is the most common primary brain tumor. It is highly malignant and has a correspondingly poor prognosis. Diagnosis and monitoring are mainly accomplished with MRI, but remain challenging in some cases. Therefore, complementary methods for tumor detection and characterization would be beneficial. Using magnetic resonance elastography (MRE), we performed a longitudinal study of the biomechanical properties of intracranially implanted GBM in mice and compared the results to histopathology. The biomechanical parameters of viscoelastic modulus, shear wave speed and phase angle were significantly lower in tumors compared with healthy brain tissue and decreased over time with tumor progression...
November 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29193406/online-1-h-mrs-measurements-of-time-varying-lactate-production-in-an-animal-model-of-glioma-during-administration-of-an-anti-tumoral-drug
#19
Yannick Crémillieux, Roberto Salvati, Ursule Dumont, Noël Pinaud, Véronique Bouchaud, Stéphane Sanchez, Stefan Glöggler, Alan Wong
The aims of this study were to implement a magnetic resonance spectroscopy (MRS) protocol for the online profiling of subnanomolar quantities of metabolites sampled from the extracellular fluid using implanted microdialysis and to apply this protocol in glioma-bearing rats for the quantification of lactate concentration and the measurement of time-varying lactate concentration during drug administration. MRS acquisitions on the brain microdialysate were performed using a home-built, proton-tuned, microsolenoid with an active volume of 2 μL...
November 29, 2017: NMR in Biomedicine
https://www.readbyqxmd.com/read/29191577/electrical-stimulation-of-the-insular-cortex-as-a-novel-target-for-the-relief-of-refractory-pain-an-experimental-approach-in-rodents
#20
Luiz Fabio Dimov, Elaine Flamia Toniolo, Heloísa Alonso-Matielo, Daniel Ciampi de Andrade, Luis Garcia-Larrea, Gerson Ballester, Manoel Jacobsen Teixeira, Camila Squarzoni Dale
Cortical electrical stimulation (CES) has shown to be an effective therapeutic alternative for neuropathic pain refractory to pharmacological treatment. The primary motor cortex(M1) was the main cortical target used in the vast majority of both invasive and non-invasive studies. Despite positive results M1-based approaches still fail to relieve pain in a significant proportion of individuals. It has been advocated that the direct stimulation of cortical areas directly implicated in the central integration of pain could increase the efficacy of analgesic brain stimulation...
November 27, 2017: Behavioural Brain Research
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