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https://www.readbyqxmd.com/read/28436181/cortical-hyperexcitability-and-disease-spread-in-amyotrophic-lateral-sclerosis
#1
P Menon, N Geevasinga, M van den Bos, C Yiannikas, M C Kiernan, S Vucic
BACKGROUND AND PURPOSE: Amyotrophic lateral sclerosis (ALS) is characterized by focal disease onset with a predominantly contiguous pattern of disease spread. The pathophysiological mechanisms underlying disease progression in ALS have not been elucidated. Given that cortical hyperexcitability has been identified as an important pathogenic mechanism in ALS, the aim of the present study was to determine whether changes in cortical function could mediate disease spread in ALS. METHODS: Threshold-tracking transcranial magnetic stimulation was undertaken in 50 patients with sporadic ALS with recording of responses over both abductor pollicis brevis muscles, with results matched to clinical assessments and concurrent neurophysiological investigation of lower motor neuron function...
April 24, 2017: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/28435045/current-direction-dependent-modulation-of-human-hand-motor-function-by-intermittent-theta-burst-stimulation-itbs
#2
Yuichiro Shirota, Suman Dhaka, Walter Paulus, Martin Sommer
BACKGROUND: Transcranial magnetic stimulation (TMS) with different current directions can activate different sets of neurons. Current direction can also affect the results of repetitive TMS. OBJECTIVE: To test the influence of uni-directional intermittent theta burst stimulation (iTBS) using different current directions, namely posteroanterior (PA) and anteroposterior (AP), on motor behaviour. METHODS: In a cross-over design, PA- and AP-iTBS was applied over the left primary motor cortex in 19 healthy, right-handed volunteers...
April 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28435044/expertise-dependent-motor-somatotopy-of-music-perception
#3
Yuta Furukawa, Kazumasa Uehara, Shinichi Furuya
Precise mapping between sound and motion underlies successful communication and information transmission in speech and musical performance. Formation of the map typically undergoes plastic changes in the neuronal network between auditory and motor regions through training. However, to what extent the map is somatotopically-tuned so that auditory information can specifically modulate the corticospinal system responsible for the relevant motor action has not been elucidated. Here we addressed this issue by assessing the excitability of corticospinal system including the primary motor cortex (M1) innervating the hand intrinsic muscles by means of transcranial magnetic stimulation while trained pianists and musically-untrained individuals (non-musicians) were listening to either piano tones or noise...
April 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28433830/spasticity-management-the-current-state-of-transcranial-neuromodulation
#4
REVIEW
Antonino Leo, Antonino Naro, Francesco Molonia, Provvidenza Tomasello, Ileana Saccà, Alessia Bramanti, Margherita Russo, Placido Bramanti, Angelo Quartarone, Rocco Salvatore Calabrò
This narrative review aims to provide an objective view of the non-invasive neuromodulation (NINM) protocols available for treating spasticity, including repetitive transcranial magnetic stimulation (rTMS) and transcranial direct current stimulation (tDCS). On the basis of the relevant randomized controlled trials, we infer that NINM is more effective in reducing spasticity when combined with the conventional therapies than used as a stand-alone treatment. However, the magnitude of NINM aftereffects depends significantly on the applied hemisphere and the underlying pathology...
April 19, 2017: PM & R: the Journal of Injury, Function, and Rehabilitation
https://www.readbyqxmd.com/read/28431323/transcranial-magnetic-stimulation-in-developmental-stuttering-relations-with-previous-neurophysiological-research-and-future-perspectives
#5
REVIEW
P Busan, P P Battaglini, M Sommer
Developmental stuttering (DS) is a disruption of the rhythm of speech, and affected people may be unable to execute fluent voluntary speech. There are still questions about the exact causes of DS. Evidence suggests there are differences in the structure and functioning of motor systems used for preparing, executing, and controlling motor acts, especially when they are speech related. Much research has been obtained using neuroimaging methods, ranging from functional magnetic resonance to diffusion tensor imaging and electroencephalography/magnetoencephalography...
April 3, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28431286/age-related-changes-in-corticospinal-excitability-and-intracortical-inhibition-after-upper-extremity-motor-learning-a-systematic-review-and-meta-analysis
#6
Kelly M M Berghuis, John G Semmler, George M Opie, Aylin K Post, Tibor Hortobágyi
It is unclear how old age affects the neuronal mechanisms of motor learning. We reviewed the neuronal mechanisms of how healthy old and young adults acquire motor skills as assessed with transcranial magnetic stimulation. Quantitative meta-analyses of 11 studies, involving ballistic and visuomotor tasks performed by upper extremity muscles in 132 healthy old and 128 young adults, revealed that the motor practice-induced increase in corticospinal excitability (CSE) is task-dependent but not age-dependent, with an increase in CSE in both age groups after visuomotor but not ballistic training...
March 27, 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/28430976/acute-and-chronic-noradrenergic-effects-on-cortical-excitability-in-healthy-humans
#7
Hsiao-I Kuo, Walter Paulus, Giorgi Batsikadze, Asif Jamil, Min-Fang Kuo, Michael A Nitsche
Background: Noradrenaline is a major neuromodulator in the central nervous system, and it is involved in the pathophysiology of diverse neuropsychiatric diseases. Previous transcranial magnetic stimulation (TMS) studies suggested that acute application of selective noradrenaline reuptake inhibitors (NRI) enhances cortical excitability in the human brain. However, other, such like clinical effects, usually require prolonged NRI treatment, which might go along with different physiological effects...
April 19, 2017: International Journal of Neuropsychopharmacology
https://www.readbyqxmd.com/read/28430974/using-transcranial-magnetic-stimulation-of-the-undamaged-brain-to-identify-lesion-sites-that-predict-language-outcome-after-stroke
#8
Diego L Lorca-Puls, Andrea Gajardo-Vidal, Mohamed L Seghier, Alexander P Leff, Varun Sethi, Susan Prejawa, Thomas M H Hope, Joseph T Devlin, Cathy J Price
Transcranial magnetic stimulation focused on either the left anterior supramarginal gyrus or opercular part of the left inferior frontal gyrus has been reported to transiently impair the ability to perform phonological more than semantic tasks. Here we tested whether phonological processing abilities were also impaired following lesions to these regions in right-handed, English speaking adults, who were investigated at least 1 year after a left-hemisphere stroke. When our regions of interest were limited to 0...
April 18, 2017: Brain: a Journal of Neurology
https://www.readbyqxmd.com/read/28428769/individualized-repetitive-transcranial-magnetic-stimulation-treatment-in-chronic-tinnitus
#9
Peter M Kreuzer, Timm B Poeppl, Rainer Rupprecht, Veronika Vielsmeier, Astrid Lehner, Berthold Langguth, Martin Schecklmann
BACKGROUND: Prefrontal and temporo-parietal repetitive transcranial magnetic stimulation (rTMS) in patients suffering from chronic tinnitus have shown significant but only moderate effectiveness with high interindividual variability in treatment response. This open-label pilot study was designed to examine the general feasibility of an individualized fronto-temporal rTMS protocol and to explore what criteria are needed for a more detailed evaluation in randomized clinical studies. METHODS: During the first session of a 2-week rTMS protocol, we applied different rTMS protocols to the left and right temporo-parietal and dorsolateral prefrontal cortex (DLPFC) in 25 tinnitus patients...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28427894/in-vivo-evaluation-of-central-cholinergic-circuits-in-parkinson-s-disease-using-transcranial-magnetic-stimulation
#10
EDITORIAL
Raffaele Nardone, Eugen Trinka
No abstract text is available yet for this article.
April 3, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28427472/optimising-conservative-management-of-chronic-low-back-pain-study-protocol-for-a-randomised-controlled-trial
#11
Katherine J Simson, Clint T Miller, Jon Ford, Andrew Hahne, Luana Main, Timo Rantalainen, Wei-Peng Teo, Megan Teychenne, David Connell, Guy Trudel, Guoyan Zheng, Gary Thickbroom, Daniel L Belavy
BACKGROUND: Lower back pain is a global health issue affecting approximately 80% of people at some stage in their life. The current literature suggests that any exercise is beneficial for reducing back pain. However, as pain is a subjective evaluation and physical deficits are evident in low back pain, using it as the sole outcome measure to evaluate superiority of an exercise protocol for low back pain treatment is insufficient. The overarching goal of the current clinical trial is to implement two common, conservative intervention approaches and examine their impact on deficits in chronic low back pain...
April 20, 2017: Trials
https://www.readbyqxmd.com/read/28427299/effects-of-low-frequency-repetitive-transcranial-magnetic-stimulation-on-upper-extremity-motor-recovery-and-functional-outcomes-in-chronic-stroke-patients-a-randomized-controlled-trial
#12
Ayhan Aşkın, Aliye Tosun, Ümit Seçil Demirdal
BACKGROUND: Repetitive transcranial magnetic stimulation (rTMS) was suggested as a preconditioning method that would increase brain plasticity and that it would be optimal to combine rTMS with intensive rehabilitation. OBJECTIVE: To assess the efficacy of inhibitory rTMS on upper extremity motor recovery and functional outcomes in chronic ischemic stroke patients. METHODS: In this randomized controlled trial, experimental group received low-frequency (LF) rTMS to the primary motor cortex of the unaffected side + physical therapy (PT), and control group received PT...
April 20, 2017: Somatosensory & Motor Research
https://www.readbyqxmd.com/read/28426872/importance-and-difficulties-of-pursuing-rtms-research-in-acute-stroke
#13
James R Carey, Diane M Chappuis, Marsha J Finkelstein, Kate L Frost, Lynette K Leuty, Allison L McNulty, Lars I E Oddsson, Erin M Seifert, Teresa J Kimberley
Although much research has been done on repetitive transcranial magnetic stimulation (rTMS) in chronic stroke, only sparse research has been done in acute stroke despite the particularly rich potential for neuroplasticity in this stage. We attempted a preliminary clinical trial in one active, high-quality inpatient rehabilitation facility (IRF) in the -United States. But after enrolling only 4 patients in the grant period, the study was stopped because of low enrollment. The purpose of this paper is to offer a perspective describing the important physiologic rationale for including rTMS in the early phase of stroke, the reasons for our poor patient enrollment in our attempted study, and recommendations to help future studies succeed...
March 1, 2017: Physical Therapy
https://www.readbyqxmd.com/read/28424294/gaba-and-primary-motor-cortex-inhibition-in-young-and-older-adults-a-multimodal-reliability-study
#14
Ronan A Mooney, John Cirillo, Winston D Byblow
The effects of healthy ageing on gamma-aminobutyric acid (GABA) within primary motor cortex (M1) remain poorly understood. Studies have reported contrasting results, potentially due to limitations with the common assessment technique. The aim of the present study was to investigate the effect of healthy ageing on M1 GABA concentration and neurotransmission using a multimodal approach. Fifteen young and 16 older adults participated in this study. Magnetic resonance spectroscopy (MRS) was used to measure M1 GABA concentration...
April 19, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28420970/single-session-anodal-tdcs-with-small-size-stimulating-electrodes-over-frontoparietal-superficial-sites-does-not-affect-motor-sequence-learning
#15
Fahimeh Hashemirad, Paul B Fitzgerald, Maryam Zoghi, Shapour Jaberzadeh
Due to the potential of anodal transcranial direct current stimulation (a-tDCS) for enhancement of fine sequenced movements and increasing interest in achieving high level of fine movements in the trained and untrained hands especially at initial stage of learning, we designed this study to investigate whether the application of single-session a-tDCS with small-size stimulating electrodes over FPN sites, such as dorsolateral prefrontal cortex (DLPFC), primary motor cortex (M1) or posterior parietal cortex (PPC) could enhance sequence learning with the trained hand and these effects are transferred into the untrained hand or not...
2017: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/28420271/imaging-tms-antidepressant-mechanisms-and-treatment-optimization
#16
Marc Dubin
With the antidepressant efficacy of Transcranial Magnetic Stimulation well-established by several meta-analyses, there is growing interest in its mechanism of action. TMS has been shown to engage, and in some cases, normalize functional connectivity and neurotransmitter levels within networks dysfunctional in the depressed state. In this review, I will suggest candidate biomarkers, based on neuroimaging, that may be predictive of response to TMS. I will then review the effects of TMS on networks and neurotransmitter systems involved in depression...
February 15, 2017: International Review of Psychiatry
https://www.readbyqxmd.com/read/28419623/cognitive-component-of-psychomotor-retardation-in-unipolar-and-bipolar-depression-is-verbal-fluency-a-relevant-marker-impact-of-repetitive-transcranial-stimulation
#17
Véronique Thomas-Ollivier, Emmanuelle Foyer, Samuel Bulteau, Anne Pichot, Pierre Valriviere, Anne Sauvaget, Thibault Deschamps
AIMS: In the literature, psychomotor retardation (PMR) is increasingly highlighted as a relevant marker for depression. Currently, we chose to focus on the fluency capacities as an evaluation of the frontal lobes functioning to reach a better understanding of cognitive and neurobiological mechanisms involved in PMR in depression. The aims of this study were 1) to explore the cognitive component of PMR through the analysis of Verbal Fluency (VF) performance in unipolar and bipolar depression; 2) to examine whether a repetitive transcranial magnetic stimulation (rTMS) treatment can improve concomitantly the RPM and VF capacities, as a relevant marker characteristic of the cognitive component of PMR...
April 17, 2017: Psychiatry and Clinical Neurosciences
https://www.readbyqxmd.com/read/28416063/-repetitive-transcranial-magnetic-stimulation-treatment-for-post-traumatic-stress-disorder
#18
Bo Søndergaard Jensen, Mahmoud Ashkanian
Approximately 10% of combat soldiers and 30% of rape victims develop post-traumatic stress disorder (PTSD). Repetitive transcranial magnetic stimulation (rTMS) is already known to be safe in depression treatment. Research results of the past 15 years indicate that rTMS induced to the right dorsolateral prefrontal cortex may have a potential to treat the symptoms of PTSD. Furthermore, high-frequency rTMS seems to be superior to low-frequency rTMS. The effect of rTMS on PTSD symptoms could be mediated by increasing the level of brain-derived neurotrophic factor...
April 17, 2017: Ugeskrift for Laeger
https://www.readbyqxmd.com/read/28415897/electric-field-navigated-transcranial-magnetic-stimulation-for-chronic-tinnitus-a-randomized-placebo-controlled-study
#19
Hanna Sahlsten, Juuso Virtanen, Juho Joutsa, Katri Niinivirta-Joutsa, Eliisa Löyttyniemi, Reijo Johansson, Janika Paavola, Tero Taiminen, Noora Sjösten, Jaakko Salonen, Anu Holm, Esa Rauhala, Satu K Jääskeläinen
OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) may alleviate tinnitus. We evaluated effects of electric field (E-field) navigated rTMS targeted according to tinnitus pitch. No controlled studies have investigated anatomically accurate E-field-rTMS for tinnitus. DESIGN: Effects of E-field-rTMS were evaluated in a prospective randomised placebo-controlled 6-month follow-up study on parallel groups. Patients received 10 sessions of 1 Hz rTMS or placebo targeted to the left auditory cortex corresponding to tonotopic representation of tinnitus pitch...
April 18, 2017: International Journal of Audiology
https://www.readbyqxmd.com/read/28413944/the-assessment-of-motor-fatigability-in-persons-with-multiple-sclerosis-a-systematic-review
#20
Deborah Severijns, Inge Zijdewind, Ulrik Dalgas, Ilse Lamers, Caroline Lismont, Peter Feys
BACKGROUND: Persons with multiple sclerosis (PwMS) are often characterized by increased motor fatigability, which is a performance change on an objectively measured criterion after any type of voluntary muscle contractions. This review summarizes the existing literature to determine which protocols and outcome measures are best to detect or study motor fatigability and the underlying mechanisms in MS. METHODS: Two electronic databases, PubMed and Web of Science, were searched for relevant articles published until August 2016 with a combination of multiple sclerosis, fatigability, muscle fatigue, and motor fatigue...
May 2017: Neurorehabilitation and Neural Repair
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