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Transcranial magnetic stimulation, TMS

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https://www.readbyqxmd.com/read/28522346/seeing-in-the-dark-phosphene-thresholds-with-eyes-open-versus-closed-in-the-absence-of-visual-inputs
#1
T A de Graaf, F Duecker, Y Stankevich, S Ten Oever, A T Sack
BACKGROUND: Voluntarily opening or closing our eyes results in fundamentally different input patterns and expectancies. Yet it remains unclear how our brains and visual systems adapt to these ocular states. OBJECTIVE/HYPOTHESIS: We here used transcranial magnetic stimulation (TMS) to probe the excitability of the human visual system with eyes open or closed, in the complete absence of visual inputs. METHODS: Combining Bayesian staircase procedures with computer control of TMS pulse intensity allowed interleaved determination of phosphene thresholds (PT) in both conditions...
May 3, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28516033/the-impact-of-large-structural-brain-changes-in-chronic-stroke-patients-on-the-electric-field-caused-by-transcranial-brain-stimulation
#2
Sena Minjoli, Guilherme B Saturnino, Jakob Udby Blicher, Charlotte J Stagg, Hartwig R Siebner, André Antunes, Axel Thielscher
Transcranial magnetic stimulation (TMS) and transcranial direct current stimulation (TDCS) are two types of non-invasive transcranial brain stimulation (TBS). They are useful tools for stroke research and may be potential adjunct therapies for functional recovery. However, stroke often causes large cerebral lesions, which are commonly accompanied by a secondary enlargement of the ventricles and atrophy. These structural alterations substantially change the conductivity distribution inside the head, which may have potentially important consequences for both brain stimulation methods...
2017: NeuroImage: Clinical
https://www.readbyqxmd.com/read/28515687/effects-of-passive-finger-movement-on-cortical-excitability
#3
Masaki Nakagawa, Ryoki Sasaki, Shota Tsuiki, Shota Miyaguchi, Sho Kojima, Kei Saito, Yasuto Inukai, Hideaki Onishi
This study examined the effects of joint angle and passive movement direction on corticospinal excitability. The subjects were 14 healthy adults from whom consent could be obtained. We performed two experiments. In Experiment 1, we measured motor evoked potential (MEP) amplitude, F-wave and M-wave at 0° and 20° adduction during adduction or abduction movement, in the range of movement from 10° abduction to 30° adduction. In Experiment 2, MEPs were measured at static 0° and 20° adduction during passive adduction from 10° adduction to 30° adduction and static 20° adduction...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28512429/reduced-prefrontal-short-latency-afferent-inhibition-in-older-adults-and-its-relation-to-executive-function-a-tms-eeg-study
#4
Yoshihiro Noda, Reza Zomorrodi, Felicity Backhouse, Robin F H Cash, Mera S Barr, Tarek K Rajji, Robert Chen, Zafiris J Daskalakis, Daniel M Blumberger
Combining transcranial magnetic stimulation (TMS) with electroencephalography (EEG) allows for the assessment of various neurophysiological processes in the human cortex. One of these paradigms, short-latency afferent inhibition (SAI), is thought to be a sensitive measure of cholinergic activity. In a previous study, we demonstrated the temporal pattern of this paradigm from both the motor (M1) and dorsolateral prefrontal cortex (DLPFC) using simultaneous TMS-EEG recording. The SAI paradigm led to marked modulations at N100...
2017: Frontiers in Aging Neuroscience
https://www.readbyqxmd.com/read/28511127/neurophysiology-of-synaptic-functioning-in-multiple-sclerosis
#5
REVIEW
Mario Stampanoni Bassi, Francesco Mori, Fabio Buttari, Girolama A Marfia, Andrea Sancesario, Diego Centonze, Ennio Iezzi
Multiple sclerosis (MS) is an inflammatory immune-mediate disorder of the central nervous system (CNS), primarily affecting the myelin sheath and followed by neurodegeneration. Synaptic alterations are emerging as critical determinants of early neurodegeneration in MS. Inflammation-induced alterations of synaptic transmission and plasticity have been investigated in vitro and also in human MS using transcranial magnetic stimulation (TMS) techniques. Specific inflammatory cytokines alter glutamatergic and GABAergic transmission, resulting in synaptic hyperexcitability...
April 24, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28511126/endophenotyping-in-idiopathic-adult-onset-cervical-dystonia
#6
Georg Kägi, Diane Ruge, Florian Brugger, Petra Katschnig, Rafael Sauter, Mirta Fiorio, Michele Tinazzi, John Rothwell, Kailash P Bhatia
OBJECTIVE: Idiopathic adult onset cervical dystonia (IAOCD) is considered to be a partially penetrant autosomal dominant genetic condition. Dystonia may result from genetic and environmental factors. In this view, part of the physiology should be an endophenotype stemming from the genetic background. We assessed the most discriminative test to separate patients with IAOCD and healthy controls for further endophenotyping in non-affected 1st degree relatives. METHODS: We included patients with IAOCD, their 1st degree relatives and healthy controls...
April 23, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28507531/noradrenergic-activation-of-hypoglossal-nucleus-modulates-the-central-regulation-of-genioglossus-in-chronic-intermittent-hypoxic-rats
#7
Xinshi Nie, Ling Zhou, Aidi Wang, Hongyu Jin, Zheng Qin, Jian Pang, Wei Wang, Jian Kang
Neuromuscular compensation of the genioglossus muscle can be induced by chronic intermittent hypoxia (CIH) in obstructive sleep apnea to maintain upper airway stability. Noradrenergic activation of hypoglossal nucleus plays a critical role in the central control of the genioglossus. However, it remains unknown whether norepinephrine takes part in the central regulation of the genioglossus during CIH. Adult male Wistar rats (n = 32) were studied to explore the influence of noradrenergic activation of hypoglossal nucleus on the central control of the genioglossus at different stages of CIH...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28506878/pain-motor-integration-in-the-primary-motor-cortex-in-parkinson-s-disease
#8
A Suppa, C Leone, F Di Stasio, L Marsili, A Di Santo, A Biasiotta, S La Cesa, A Truini, G Cruccu, A Berardelli
BACKGROUND: In Parkinson's disease (PD), the influence of chronic pain on motor features has never been investigated. We have recently designed a technique that combines nociceptive system activation by laser stimuli and primary motor cortex (M1) activation through transcranial magnetic stimulation (TMS), in a laser-paired associative stimulation design (Laser-PAS). In controls, Laser-PAS induces long-term changes in motor evoked potentials reflecting M1 long-term potentiation-like plasticity, arising from pain-motor integration...
April 30, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28506486/preoperative-and-intraoperative-neurophysiological-investigations-for-surgical-resections-in-functional-areas
#9
G Huberfeld, A Trébuchon, L Capelle, J-M Badier, S Chen, J-P Lefaucheur, M Gavaret
Brain regions are removed to treat lesions, but great care must be taken not to disturb or remove functional areas in the lesion and in surrounding tissue where healthy and diseased cells may be intermingled, especially for infiltrating tumors. Cortical functional areas and fiber tracts can be localized preoperatively by probabilistic anatomical tools, but mapping of functional integrity by neurophysiology is essential. Identification of the primary motor cortex seems to be more effectively performed with transcranial magnetic stimulation (TMS) than functional magnetic resonance imaging (fMRI)...
May 12, 2017: Neuro-Chirurgie
https://www.readbyqxmd.com/read/28504121/corticospinal-excitability-during-the-processing-of-handwritten-and-typed-words-and-non-words
#10
Chelsea L Gordon, Michael J Spivey, Ramesh Balasubramaniam
A number of studies have suggested that perception of actions is accompanied by motor simulation of those actions. To further explore this proposal, we applied Transcranial magnetic stimulation (TMS) to the left primary motor cortex during the observation of handwritten and typed language stimuli, including words and non-word consonant clusters. We recorded motor-evoked potentials (MEPs) from the right first dorsal interosseous (FDI) muscle to measure cortico-spinal excitability during written text perception...
May 11, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28499145/human-dorsomedial-parieto-motor-circuit-specifies-grasp-during-the-planning-of-goal-directed-hand-actions
#11
Michael Vesia, Michael Barnett-Cowan, Behzad Elahi, Gaayathiri Jegatheeswaran, Reina Isayama, Jason L Neva, Marco Davare, W Richard Staines, Jody C Culham, Robert Chen
According to one influential view, two specialized parieto-frontal circuits control prehension: a dorsomedial stream for hand transport during reaching and a dorsolateral stream for preshaping the fingers during grasping. However, recent evidence argues that an area within the dorsomedial stream-macaque area V6A and, its putative human homolog, superior parietal occipital cortex (SPOC) - encodes both hand transport and grip formation. We tested whether planning varied hand actions modulates functional connectivity between left SPOC and ipsilateral primary motor cortex (M1) using a dual-site, paired-pulse transcranial magnetic stimulation paradigm with two coils (dsTMS)...
April 19, 2017: Cortex; a Journal Devoted to the Study of the Nervous System and Behavior
https://www.readbyqxmd.com/read/28495634/network-targeted-cerebellar-transcranial-magnetic-stimulation-improves-attentional-control
#12
Michael Esterman, Michelle Thai, Hidefusa Okabe, Joseph DeGutis, Elyana Saad, Simon E Laganiere, Mark A Halko
Developing non-invasive brain stimulation interventions to improve attentional control is extremely relevant to a variety of neurologic and psychiatric populations, yet few studies have identified reliable biomarkers that can be readily modified to improve attentional control. One potential biomarker of attention is functional connectivity in the core cortical network supporting attention - the dorsal attention network (DAN). We used a network-targeted cerebellar transcranial magnetic stimulation (TMS) procedure, intended to enhance cortical functional connectivity in the DAN...
May 8, 2017: NeuroImage
https://www.readbyqxmd.com/read/28489931/cortical-involvement-in-celiac-disease-before-and-after-long-term-gluten-free-diet-a-transcranial-magnetic-stimulation-study
#13
Manuela Pennisi, Giuseppe Lanza, Mariagiovanna Cantone, Riccardo Ricceri, Raffaele Ferri, Carmela Cinzia D'Agate, Giovanni Pennisi, Vincenzo Di Lazzaro, Rita Bella
OBJECTIVE: Transcranial Magnetic Stimulation in de novo patients with Celiac Disease previously revealed an imbalance in the excitability of cortical facilitatory and inhibitory circuits. After a median period of 16 months of gluten-free diet, a global increase of cortical excitability was reported, suggesting a glutamate-mediated compensation for disease progression. We have now evaluated cross-sectionally the changes of cortical excitability to TMS after a much longer gluten-free diet...
2017: PloS One
https://www.readbyqxmd.com/read/28487249/combining-tdcs-with-prismatic-adaptation-for-non-invasive-neuromodulation-of-the-motor-cortex
#14
Martina Bracco, Giuseppa Renata Mangano, Patrizia Turriziani, Daniela Smirni, Massimiliano Oliveri
BACKGROUND: Prismatic adaptation (PA) shifts visual field laterally and induces lateralized deviations of spatial attention. Recently, it has been suggested that prismatic goggles are also able to modulate brain excitability, with cognitive after-effects documented even in tasks not necessarily spatial in nature. OBJECTIVE: The aim of the present study was to test whether neuromodulatory effects obtained from tDCS and prismatic goggles could interact and induce homeostatic changes in corticospinal excitability...
May 6, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28478887/investigating-the-neurobiology-of-schizophrenia-and-other-major-psychiatric-disorders-with-transcranial-magnetic-stimulation
#15
REVIEW
Rachel E Kaskie, Fabio Ferrarelli
Characterizing the neurobiology of schizophrenia and other major psychiatric disorders is one of the main challenges of the current research in psychiatry. The availability of Transcranial Magnetic Stimulation (TMS) allows to directly probe virtually any cortical areas, thus providing a unique way to assess the neurophysiological properties of cortical neurons. This article presents a review of studies employing TMS in combination with Motor Evoked Potentials (TMS/MEPs) and high density Electroencephalogram (TMS/hd-EEG) in schizophrenia and other major psychiatric disorders...
May 3, 2017: Schizophrenia Research
https://www.readbyqxmd.com/read/28476213/reprint-of-using-neuroimaging-to-individualize-tms-treatment-for-depression-toward-a-new-paradigm-for-imaging-guided-intervention
#16
Bruce M Luber, Simon Davis, Elisabeth Bernhardt, Andrada Neacsiu, Lori Kwapil, Sarah H Lisanby, Timothy J Strauman
The standard clinical technique for using repetitive transcranial magnetic stimulation (rTMS) for major depressive disorder (MDD) is associated with limited efficacy to date. Such limited efficacy may be due to reliance on scalp-based targeting rather than state-of-the-science methods which incorporate fMRI-guided neuronavigation based on a specific model of neurocircuit dysfunction. In this review, we examine such a specific model drawn from regulatory focus theory, which postulates two brain/behavior systems, the promotion and prevention systems, underlying goal pursuit...
May 1, 2017: NeuroImage
https://www.readbyqxmd.com/read/28475487/can-somatosensory-electrical-stimulation-relieve-spasticity-in-post-stroke-patients-a-tms-pilot-study
#17
André Salles Cunha Peres, Victor Hugo Souza, João Marcos Yamasaki Catunda, Kelley Cristine Mazzeto-Betti, Taiza Elaine Grespan Santos-Pontelli, Claudia Domingues Vargas, Oswaldo Baffa, Draulio Barros de Araújo, Octávio Marques Pontes-Neto, João Pereira Leite, Marco Antonio Cavalcanti Garcia
Evidence suggests that somatosensory electrical stimulation (SES) may decrease the degree of spasticity from neural drives, although there is no agreement between corticospinal modulation and the level of spasticity. Thus, stroke patients and healthy subjects were submitted to SES (3 Hz) for 30' on the impaired and dominant forearms, respectively. Motor evoked potentials induced by single-pulse transcranial magnetic stimulation were collected from two forearm muscles before and after SES. The passive resistance of the wrist joint was measured with an isokinetic system...
May 5, 2017: Biomedizinische Technik. Biomedical Engineering
https://www.readbyqxmd.com/read/28474552/new-directions-in-the-use-of-brain-stimulation-interventions-in-patients-with-obsessive-compulsive-disorder
#18
Bernardo Dell'Osso, Laura Cremaschi, Lucio Oldani, Altamura Alfredo Carlo
Obsessive-Compulsive Disorder (OCD) is a highly disabling condition with early onset and chronic course in most of the affected patients. In addition, OCD may show high comorbidity and suicide attempt rates, which worsen the overall burden of the disease for patients and their caregivers. First-line treatments for OCD consist of pro-serotonergic compounds and cognitive-behavioral therapy. Nonetheless, many patients show only limited benefit from such interventions and require additional "next-step" interventions, including augmentative antipsychotics and glutamate-modulating agents...
May 4, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28473764/paired-associative-stimulation-targeting-the-tibialis-anterior-muscle-using-either-mono-or-biphasic-transcranial-magnetic-stimulation
#19
Natalie Mrachacz-Kersting, Andrew J T Stevenson
Paired associative stimulation (PAS) protocols induce plastic changes within the motor cortex. The objectives of this study were to investigate PAS effects targeting the tibialis anterior (TA) muscle using a biphasic transcranial magnetic stimulation (TMS) pulse form and, to determine whether a reduced intensity of this pulse would lead to significant changes as has been reported for hand muscles using a monophasic TMS pulse. Three interventions were investigated: (1) suprathreshold PAbi-PAS (n = 11); (2) suprathreshold PAmono-PAS (n = 11) where PAS was applied using a biphasic or monophasic pulse form at 120% resting motor threshold (RMT); (3) subthreshold PAbi-PAS (n = 10) where PAS was applied as for (1) at 95% active motor threshold (AMT)...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28473647/disruption-of-the-right-temporoparietal-junction-impairs-probabilistic-belief-updating
#20
Paola Mengotti, Pascasie L Dombert, Gereon R Fink, Simone Vossel
Generating and updating probabilistic models of the environment is a fundamental modus operandi of the human brain. Though crucial for various cognitive functions, the neural mechanisms of these inference processes remain to be elucidated. Here, we show the causal involvement of the right temporoparietal junction (rTPJ) in updating probabilistic beliefs and we provide new insights into the chronometry of the process by combining online transcranial magnetic stimulation (TMS) with computational modelling of behavioral responses...
May 4, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
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