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https://www.readbyqxmd.com/read/28916867/reorganization-of-motor-representations-in-patients-with-brain-lesions-a-navigated-transcranial-magnetic-stimulation-study
#1
Lucia Bulubas, Nico Sollmann, Noriko Tanigawa, Claus Zimmer, Bernhard Meyer, Sandro M Krieg
This is an explorative study applying presurgical navigated transcranial magnetic stimulation (nTMS) to investigate the spatial distributions of motor sites to reveal tumor-induced brain plasticity in patients with brain tumors. We analyzed nTMS-based motor maps derived from presurgical mapping of 100 patients with motor eloquently located brain tumors (tumors in the frontal lobe, the precentral gyrus [PrG], the postcentral gyrus [PoG], the remaining parietal lobe, or the temporal lobe). Based on these motor maps, we systematically investigated changes in motor evoked potential (MEP) counts among 4 gyri (PrG, PoG, medial frontal gyrus, and superior frontal gyrus) between subgroups of patients according to the tumor location in order to depict the tumor's influence on reorganization...
September 15, 2017: Brain Topography
https://www.readbyqxmd.com/read/28840099/specific-dti-seeding-and-diffusivity-analysis-improve-the-quality-and-prognostic-value-of-tms-based-deterministic-dti-of-the-pyramidal-tract
#2
Tizian Rosenstock, Davide Giampiccolo, Heike Schneider, Sophia Jutta Runge, Ina Bährend, Peter Vajkoczy, Thomas Picht
OBJECT: Navigated transcranial magnetic stimulation (nTMS) combined with diffusion tensor imaging (DTI) is used preoperatively in patients with eloquent-located brain lesions and allows analyzing non-invasively the spatial relationship between the tumor and functional areas (e.g. the motor cortex and the corticospinal tract [CST]). In this study, we examined the diffusion parameters FA (fractional anisotropy) and ADC (apparent diffusion coefficient) within the CST in different locations and analyzed their interrater reliability and usefulness for predicting the patients' motor outcome with a precise approach of specific region of interest (ROI) seeding based on the color-coded FA-map...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28830029/persistent-uncrossed-corticospinal-connections-in-patients-with-intractable-focal-epilepsy
#3
Harper L Kaye, Roman Gersner, Aaron D Boes, Alvaro Pascual-Leone, Alexander Rotenberg
Corticospinal connections may be bilateral at birth, but a predominantly unilateral and crossed pattern develops by the toddler years. Acquired injury can alter the normal development of laterality such that uncrossed corticospinal connections persist, particularly if the injury is early in life and involves the motor system. Whether other developmental insults, such as childhood epilepsy, affect the development of crossed laterality in the motor system is unknown, although this topic has relevance for understanding the broader impact of epilepsy on brain development...
August 19, 2017: Epilepsy & Behavior: E&B
https://www.readbyqxmd.com/read/28721533/minimum-norm-estimation-of-motor-representations-in-navigated-tms-mappings
#4
Minna Pitkänen, Elisa Kallioniemi, Petro Julkunen, Maria Nazarova, Jaakko O Nieminen, Risto J Ilmoniemi
Navigated transcranial magnetic stimulation (nTMS) can be applied to locate and outline cortical motor representations. This may be important, e.g., when planning neurosurgery or focused nTMS therapy, or when assessing plastic changes during neurorehabilitation. Conventionally, a cortical location is considered to belong to the motor cortex if the maximum electric field (E-field) targeted there evokes a motor-evoked potential in a muscle. However, the cortex is affected by a broad E-field distribution, which tends to broaden estimates of representation areas by stimulating also the neighboring areas in addition to the maximum E-field location...
July 18, 2017: Brain Topography
https://www.readbyqxmd.com/read/28616385/neurophysiological-evidence-of-preserved-connectivity-in-tuber-tissue
#5
H L Kaye, J M Peters, R Gersner, M Chamberland, A Sansevere, A Rotenberg
We present a case of preserved corticospinal connectivity in a cortical tuber, in a 10 year-old boy with intractable epilepsy and tuberous sclerosis complex (TSC). The patient had multiple subcortical tubers, one of which was located in the right central sulcus. In preparation for epilepsy surgery, motor mapping, by neuronavigated transcranial magnetic stimulation (nTMS) coupled with surface electromyography (EMG) was performed to locate the primary motor cortical areas. The resulting functional motor map revealed expected corticospinal connectivity in the left precentral gyrus...
2017: Epilepsy & Behavior Case Reports
https://www.readbyqxmd.com/read/28501904/relationship-between-perisylvian-essential-language-sites-and-arcuate-fasciculus-in-the-left-hemisphere-of-healthy-adults
#6
Yu Lin, Kai Zhang, Shuai Li, Song Li, Jingna Jin, Fang Jin, Wen Qin, Long Hai, Meng Zhu, Chunshui Yu, Zhipeng Liu, Tao Yin, Xuejun Yang
Essential language sites and the arcuate fasciculus (AF) have been extensively researched. However, the relationship between them remains insufficiently studied, especially in healthy people. Navigated transcranial magnetic stimulation (nTMS) is increasingly used in language mapping. While enjoying the advantage of non-invasiveness, it is also capable of inducing a virtual lesion in the brain. Thus, it offers the possibility of using the virtual-lesion method to study the healthy brain. This study combined nTMS and diffusion tensor imaging (DTI) tractography to investigate the relationship between essential language sites and the AF in 30 healthy right-handed volunteers...
May 13, 2017: Neuroscience Bulletin
https://www.readbyqxmd.com/read/28456870/protocol-for-motor-and-language-mapping-by-navigated-tms-in-patients-and-healthy-volunteers-workshop-report
#7
REVIEW
Sandro M Krieg, Pantelis Lioumis, Jyrki P Mäkelä, Juha Wilenius, Jari Karhu, Henri Hannula, Petri Savolainen, Carolin Weiss Lucas, Kathleen Seidel, Aki Laakso, Mominul Islam, Selja Vaalto, Henri Lehtinen, Anne-Mari Vitikainen, Phiroz E Tarapore, Thomas Picht
INTRODUCTION: Navigated transcranial magnetic stimulation (nTMS) is increasingly used for preoperative mapping of motor function, and clinical evidence for its benefit for brain tumor patients is accumulating. In respect to language mapping with repetitive nTMS, literature reports have yielded variable results, and it is currently not routinely performed for presurgical language localization. The aim of this project is to define a common protocol for nTMS motor and language mapping to standardize its neurosurgical application and increase its clinical value...
July 2017: Acta Neurochirurgica
https://www.readbyqxmd.com/read/28377253/implementing-functional-preoperative-mapping-in-the-clinical-routine-of-a-neurosurgical-department-technical-note
#8
Nico Sollmann, Bernhard Meyer, Sandro M Krieg
BACKGROUND: Navigated transcranial magnetic stimulation (nTMS) is increasingly being used for mapping of various brain functions and in nTMS-based tractography in neurosurgical departments worldwide. When a department begins using nTMS data in the clinical workflow, smooth integration into the hospital's existing infrastructure is mandatory. Standardized approaches for this beyond the mapping or tractography procedures themselves have not yet been described. METHODS: To create an effective workflow for neurosurgical nTMS mapping, we present the findings of our 7 years of experience and progressive integration into the clinical routine...
July 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28362239/associations-between-clinical-outcome-and-navigated-transcranial-magnetic-stimulation-characteristics-in-patients-with-motor-eloquent-brain-lesions-a-combined-navigated-transcranial-magnetic-stimulation-diffusion-tensor-imaging-fiber-tracking-approach
#9
Nico Sollmann, Noémie Wildschuetz, Anna Kelm, Neal Conway, Tobias Moser, Lucia Bulubas, Jan S Kirschke, Bernhard Meyer, Sandro M Krieg
OBJECTIVE Navigated transcranial magnetic stimulation (nTMS) and diffusion tensor imaging fiber tracking (DTI FT) based on nTMS data are increasingly used for preoperative planning and resection guidance in patients suffering from motor-eloquent brain tumors. The present study explores whether nTMS-based DTI FT can also be used for individual preoperative risk assessment regarding surgery-related motor impairment. METHODS Data derived from preoperative nTMS motor mapping and subsequent nTMS-based tractography in 86 patients were analyzed...
March 31, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28345639/genomic-characterization-of-nontuberculous-mycobacteria
#10
Tarcisio Fedrizzi, Conor J Meehan, Antonella Grottola, Elisabetta Giacobazzi, Giulia Fregni Serpini, Sara Tagliazucchi, Anna Fabio, Clotilde Bettua, Roberto Bertorelli, Veronica De Sanctis, Fabio Rumpianesi, Monica Pecorari, Olivier Jousson, Enrico Tortoli, Nicola Segata
Mycobacterium tuberculosis and Mycobacterium leprae have remained, for many years, the primary species of the genus Mycobacterium of clinical and microbiological interest. The other members of the genus, referred to as nontuberculous mycobacteria (NTM), have long been underinvestigated. In the last decades, however, the number of reports linking various NTM species with human diseases has steadily increased and treatment difficulties have emerged. Despite the availability of whole genome sequencing technologies, limited effort has been devoted to the genetic characterization of NTM species...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28327949/resection-of-navigated-transcranial-magnetic-stimulation-positive-prerolandic-motor-areas-causes-permanent-impairment-of-motor-function
#11
Tobias Moser, Lucia Bulubas, Jamil Sabih, Neal Conway, Noémie Wildschutz, Nico Sollmann, Bernhard Meyer, Florian Ringel, Sandro M Krieg
BACKGROUND: Navigated transcranial magnetic stimulation (nTMS) helps to determine the distribution of motor eloquent areas prior to brain surgery. Yet, the eloquence of primary motor areas frontal to the precentral gyrus identified via nTMS is unclear. OBJECTIVE: To investigate the resection of nTMS-positive prerolandic motor areas and its correlation with postsurgical impairment of motor function. METHODS: Forty-three patients with rolandic or prerolandic gliomas (WHO grade I-IV) underwent nTMS prior to surgery...
July 1, 2017: Neurosurgery
https://www.readbyqxmd.com/read/28317808/isolation-and-characterization-of-nontuberculous-mycobacteria-from-patients-with-pulmonary-tuberculosis-in-ghana
#12
Isaac Darko Otchere, Adwoa Asante-Poku, Stephen Osei-Wusu, Samuel Yaw Aboagye, Dorothy Yeboah-Manu
OBJECTIVE/BACKGROUND: Nontuberculous mycobacterial (NTM) species are assuming public health importance in pulmonary diseases; they are increasingly being isolated, and importantly, most NTMs do not respond to routine tuberculosis (TB) drugs. This study aimed to identify NTMs isolated from pulmonary TB cases and also determine their susceptibility to streptomycin (STR), isoniazid (INH), and rifampicin (RIF). METHODS: A total of 1755 mycobacterial isolates, obtained between August 2012 and July 2014, from 2036 smear-positive pulmonary cases were identified using polymerase chain reaction amplification of IS6110, and hsp65 gene sequencing analysis...
January 2017: International Journal of Mycobacteriology
https://www.readbyqxmd.com/read/28284580/preoperative-navigated-transcranial-magnetic-stimulation-and-tractography-in-transparietal-approach-to-the-trigone-of-the-lateral-ventricle
#13
Philipp Hendrix, Sebastian Senger, Christoph J Griessenauer, Andreas Simgen, Stefan Linsler, Joachim Oertel
OBJECTIVE: Eloquent neural structures including white matter tracts surround the trigone of the lateral ventricle. Surgical resection of trigonal tumors via the transparietal approach may cause neurological deterioration depending on the trajectory. METHODS: The authors retrospectively reviewed patients with trigonal tumors that underwent combined preoperative navigated transcranial magnetic stimulation (nTMS) and optic radiation tractography to guide a transparietal approach towards the trigone...
July 2017: Journal of Clinical Neuroscience: Official Journal of the Neurosurgical Society of Australasia
https://www.readbyqxmd.com/read/28120081/functional-reconstruction-of-motor-and-language-pathways-based-on-navigated-transcranial-magnetic-stimulation-and-dti-fiber-tracking-for-the-preoperative-planning-of-low-grade-glioma-surgery-a-new-tool-for-preservation-and-restoration-of-eloquent-networks
#14
Giovanni Raffa, Alfredo Conti, Antonino Scibilia, Carmela Sindorio, Maria Catena Quattropani, Massimiliano Visocchi, Antonino Germanò, Francesco Tomasello
BACKGROUND: Surgery of low-grade gliomas (LGGs) in eloquent areas still presents a challenge. New technologies have been introduced to enable the performance of "functional", customized preoperative planning aimed at maximal resection, while reducing the risk of postoperative deficits. We describe our experience in the surgery of LGGs in eloquent areas using preoperative planning based on navigated transcranial magnetic stimulation (nTMS) and diffusion tensor imaging (DTI) tractography...
2017: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/28106500/cortical-plasticity-of-motor-eloquent-areas-measured-by-navigated-transcranial-magnetic-stimulation-in-patients-with-glioma
#15
Neal Conway, Noémie Wildschuetz, Tobias Moser, Lucia Bulubas, Nico Sollmann, Noriko Tanigawa, Bernhard Meyer, Sandro M Krieg
OBJECTIVE The goal of this study was to obtain a better understanding of the mechanisms underlying cerebral plasticity. Coupled with noninvasive detection of its occurrence, such an understanding has huge potential to improve glioma therapy. The authors aimed to demonstrate the frequency of plastic reshaping, find clues to the patterns behind it, and prove that it can be recognized noninvasively using navigated transcranial magnetic stimulation (nTMS). METHODS The authors used nTMS to map cortical motor representation in 22 patients with gliomas affecting the precentral gyrus, preoperatively and 3-42 months postoperatively...
January 20, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28059664/navigated-transcranial-magnetic-stimulation-for-glioma-removal-prognostic-value-in-motor-function-recovery-from-postsurgical-neurological-deficits
#16
Tomokazu Takakura, Yoshihiro Muragaki, Manabu Tamura, Takashi Maruyama, Masayuki Nitta, Chiharu Niki, Takakazu Kawamata
OBJECTIVE The aim of the present study was to evaluate the usefulness of navigated transcranial magnetic stimulation (nTMS) as a prognostic predictor for upper-extremity motor functional recovery from postsurgical neurological deficits. METHODS Preoperative and postoperative nTMS studies were prospectively applied in 14 patients (mean age 39 ± 12 years) who had intraparenchymal brain neoplasms located within or adjacent to the motor eloquent area in the cerebral hemisphere. Mapping by nTMS was done 3 times, i...
January 6, 2017: Journal of Neurosurgery
https://www.readbyqxmd.com/read/28050345/functional-mri-vs-navigated-tms-to-optimize-m1-seed-volume-delineation-for-dti-tractography-a-prospective-study-in-patients-with-brain-tumours-adjacent-to-the-corticospinal-tract
#17
Carolin Weiss Lucas, Irada Tursunova, Volker Neuschmelting, Charlotte Nettekoven, Ana-Maria Oros-Peusquens, Gabriele Stoffels, Andrea Maria Faymonville, Shah N Jon, Karl Josef Langen, Hannah Lockau, Roland Goldbrunner, Christian Grefkes
BACKGROUND: DTI-based tractography is an increasingly important tool for planning brain surgery in patients suffering from brain tumours. However, there is an ongoing debate which tracking approaches yield the most valid results. Especially the use of functional localizer data such as navigated transcranial magnetic stimulation (nTMS) or functional magnetic resonance imaging (fMRI) seem to improve fibre tracking data in conditions where anatomical landmarks are less informative due to tumour-induced distortions of the gyral anatomy...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28049425/the-variability-of-motor-evoked-potential-latencies-in-neurosurgical-motor-mapping-by-preoperative-navigated-transcranial-magnetic-stimulation
#18
Nico Sollmann, Lucia Bulubas, Noriko Tanigawa, Claus Zimmer, Bernhard Meyer, Sandro M Krieg
BACKGROUND: Recording of motor evoked potentials (MEPs) is used during navigated transcranial magnetic stimulation (nTMS) motor mapping to locate motor function in the human brain. However, factors potentially underlying MEP latency variability in neurosurgical motor mapping are vastly unknown. In the context of this study, one hundred brain tumor patients underwent preoperative nTMS-based motor mapping of the tumor hemisphere between 2010 and 2013. Fourteen predefined predictor variables were recorded, and MEP latencies of abductor pollicis brevis muscle (APB), abductor digiti minimi muscle (ADM), and flexor carpi radialis muscle (FCR) were analyzed using linear mixed-effect multiple regression analysis with the forward step-wise model comparison approach...
January 3, 2017: BMC Neuroscience
https://www.readbyqxmd.com/read/28003422/matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-for-combined-species-identification-and-drug-sensitivity-testing-in-mycobacteria
#19
Pieter-Jan Ceyssens, Karine Soetaert, Markus Timke, An Van den Bossche, Katrin Sparbier, Koen De Cremer, Markus Kostrzewa, Marijke Hendrickx, Vanessa Mathys
Species identification and drug susceptibility testing (DST) of mycobacteria are important yet complex processes traditionally reserved for reference laboratories. Recent technical improvements in matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF MS) has started to facilitate routine mycobacterial identifications in clinical laboratories. In this paper, we investigate the possibility of performing phenotypic MALDI-based DST in mycobacteriology using the recently described MALDI Biotyper antibiotic susceptibility test rapid assay (MBT-ASTRA)...
February 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27994536/a-novel-technique-for-region-and-linguistic-specific-ntms-based-dti-fiber-tracking-of-language-pathways-in-brain-tumor-patients
#20
Giovanni Raffa, Ina Bährend, Heike Schneider, Katharina Faust, Antonino Germanò, Peter Vajkoczy, Thomas Picht
Navigated transcranial magnetic stimulation (nTMS) has recently been introduced as a non-invasive tool for functional mapping of cortical language areas prior to surgery. It correlates well with intraoperative neurophysiological monitoring (IONM) findings, allowing defining the best surgical strategy to preserve cortical language areas during surgery for language-eloquent tumors. Nevertheless, nTMS allows only for cortical mapping and postoperative language deficits are often caused by injury to subcortical language pathways...
2016: Frontiers in Neuroscience
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