keyword
MENU ▼
Read by QxMD icon Read
search

Transcranial magnetic stimulation, TMS

keyword
https://www.readbyqxmd.com/read/28446949/reliability-of-motor-evoked-potentials-induced-by-transcranial-magnetic-stimulation-the-effects-of-initial-motor-evoked-potentials-removal
#1
Fahimeh Hashemirad, Maryam Zoghi, Paul B Fitzgerald, Shapour Jaberzadeh
INTRODUCTION: Transcranial magnetic stimulation (TMS) is a useful tool for assessment of corticospinal excitability (CSE) changes in both healthy individuals and patients with brain disorders. The usefulness of TMS-elicited motor evoked potentials (MEPs) for the assessment of CSE in a clinical context depends on their intra-and inter-session reliability. This study aimed to evaluate if removal of initial MEPs elicited by using two types of TMS techniques influences the reliability scores and whether this effect is different in blocks with variable number of MEPs...
January 2017: Basic and Clinical Neuroscience
https://www.readbyqxmd.com/read/28446579/modulation-of-long-latency-afferent-inhibition-by-the-amplitude-of-sensory-afferent-volley
#2
Claudia V Turco, Jenin El-Sayes, Hunter J Fassett, Robert Chen, Aimee Jennifer Nelson
Long-latency afferent inhibition (LAI) is the inhibition of the transcranial magnetic stimulation (TMS) motor-evoked potentials (MEP) by the sensory afferent volley following electrical stimulation of a peripheral nerve. It is unknown how the activation of sensory afferent fibres relates to the magnitude of LAI. This study investigated the relationship between LAI and the sensory nerve action potentials (SNAP) from the median nerve (MN) and the digital nerves (DN) of the second digit. LAI was obtained by delivering nerve stimulation 200 ms prior to a TMS pulse delivered over the motor cortex...
April 26, 2017: Journal of Neurophysiology
https://www.readbyqxmd.com/read/28444832/real-time-activation-of-central-cholinergic-circuits-during-recognition-memory
#3
Sonia Bonnì, Viviana Ponzo, Francesco Di Lorenzo, Carlo Caltagirone, Giacomo Koch
Short Latency Afferent Inhibition (SAI) is a paired-pulse Transcranial Magnetic Stimulation (TMS) protocol that consists in the inhibition of the Motor Evoked Potentials (MEPs) by afferent sensory impulses. SAI is thought to be mediated by cholinergic projections over M1 and can be considered a putative marker of central cholinergic activity. It's known that memory processes are regulated by acetylcholine. Nonetheless the influence of memory tasks on SAI has not been investigated. Here we tested changes in SAI circuits in healthy subjects performing a computerized non-verbal recognition memory task (RMT) requiring to recognize previously encoded faces...
April 26, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28438543/modulation-of-motor-cortex-excitability-predicts-antidepressant-response-to-prefrontal-cortex-repetitive-transcranial-magnetic-stimulation
#4
Albino J Oliveira-Maia, Daniel Press, Alvaro Pascual-Leone
BACKGROUND: Repetitive transcranial magnetic stimulation (rTMS) targeting the left dorsolateral prefrontal cortex (DLPFC) is a treatment option for patients with medication-resistant major depressive disorder (MDD). However, antidepressant response is variable and there are currently no response predictors with sufficient accuracy for clinical use. OBJECTIVE: We report on results of an observational open-label study to determine whether the modulatory effect of 10 Hz motor cortex (MC) rTMS is predictive of the antidepressant effect of 10 Hz DLPFC rTMS...
March 31, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28435045/current-direction-dependent-modulation-of-human-hand-motor-function-by-intermittent-theta-burst-stimulation-itbs
#5
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/28431323/transcranial-magnetic-stimulation-in-developmental-stuttering-relations-with-previous-neurophysiological-research-and-future-perspectives
#6
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/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/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
#8
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/28424294/gaba-and-primary-motor-cortex-inhibition-in-young-and-older-adults-a-multimodal-reliability-study
#9
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/28420271/imaging-tms-antidepressant-mechanisms-and-treatment-optimization
#10
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/28404231/modulation-of-sensorimotor-circuits-during-retrieval-of-negative-autobiographical-memories-exploring-the-impact-of-personality-dimensions
#11
Ludovico Mineo, Carmen Concerto, Dhaval Patel, Tyrone Mayorga, Eileen Chusid, Carmenrita Infortuna, Eugenio Aguglia, Yasmin Sarraf, Fortunato Battaglia
Autobiographical Memory (AM) retrieval refers to recollection of experienced past events. Previous Transcranial Magnetic Stimulation (TMS) studies have shown that presentation of emotional negative stimuli affects human motor cortex excitability resulting in larger motor evoked potentials (MEPs). Up to date no TMS studies have been carried out in order to investigate the effect of personal memories with negative emotional value on corticospinal excitability. In this study we hypothesized that negative AM retrieval will modulate corticomotor excitability and sensorimotor integration as determined by TMS neurophysiological parameters...
April 9, 2017: Neuropsychologia
https://www.readbyqxmd.com/read/28402865/inhibition-versus-facilitation-of-contralesional-motor-cortices-in-stroke-deriving-a-model-to-tailor-brain-stimulation
#12
Vishwanath Sankarasubramanian, Andre G Machado, Adriana B Conforto, Kelsey A Potter-Baker, David A Cunningham, Nicole M Varnerin, Xiaofeng Wang, Ken Sakaie, Ela B Plow
OBJECTIVE: The standard approach to brain stimulation in stroke is based on the premise that ipsilesional M1 (iM1) is important for motor function of the paretic upper limb, while contralesional cortices compete with iM1. Therefore, the approach typically advocates facilitating iM1 and/or inhibiting contralesional M1 (cM1). But, this approach fails to elicit much improvement in severely affected patients, who on account of extensive damage to ipsilesional pathways, cannot rely on iM1...
March 21, 2017: Clinical Neurophysiology: Official Journal of the International Federation of Clinical Neurophysiology
https://www.readbyqxmd.com/read/28396622/transcranial-magnetic-stimulation-reveals-intrinsic-perceptual-and-attentional-rhythms
#13
REVIEW
Laura Dugué, Rufin VanRullen
Oscillatory brain activity has functional relevance for perceptual and cognitive processes, as proven by numerous electrophysiology studies accumulating over the years. However, only within the past two decades have researchers been able to study the causal role of such oscillations using transcranial magnetic stimulation (TMS) technology. Two complementary approaches exist. A majority of research employs rhythmic TMS (rTMS) to entrain oscillatory activity and investigate its effect on targeted brain functions...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/28394475/dynamical-entrainment-of-corticospinal-excitability-during-rhythmic-movement-observation-a-tms-study
#14
Manuel Varlet, Giacomo Novembre, Peter E Keller
Spontaneous modulations of corticospinal excitability during action observation have been interpreted as evidence for the activation of internal motor representations equivalent to the observed action. Alternatively or complementary to this perspective, growing evidence shows that motor activity during observation of rhythmic movements can be modulated by direct visuomotor couplings and dynamical entrainment. In-phase and anti-phase entrainment spontaneously occur, characterized by cyclic movements proceeding simultaneously in the same (in-phase) or opposite (anti-phase) direction...
April 10, 2017: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28389385/automatized-set-up-procedure-for-transcranial-magnetic-stimulation-protocols
#15
S Harquel, J Diard, E Raffin, B Passera, G Dall'Igna, C Marendaz, O David, A Chauvin
Transcranial Magnetic Stimulation (TMS) established itself as a powerful technique for probing and treating the human brain. Major technological evolutions, such as neuronavigation and robotized systems, have continuously increased the spatial reliability and reproducibility of TMS, by minimizing the influence of human and experimental factors. However, there is still a lack of efficient set-up procedure, which prevents the automation of TMS protocols. For example, the set-up procedure for defining the stimulation intensity specific to each subject is classically done manually by experienced practitioners, by assessing the motor cortical excitability level over the motor hotspot (HS) of a targeted muscle...
April 4, 2017: NeuroImage
https://www.readbyqxmd.com/read/28388686/vestibular-stimulation-induced-facilitation-of-cervical-premotoneuronal-systems-in-humans
#16
Shinya Suzuki, Tsuyoshi Nakajima, Shun Irie, Ryohei Ariyasu, Tomoyoshi Komiyama, Yukari Ohki
It is unclear how descending inputs from the vestibular system affect the excitability of cervical interneurons in humans. To elucidate this, we investigated the effects of galvanic vestibular stimulation (GVS) on the spatial facilitation of motor-evoked potentials (MEPs) induced by combined pyramidal tract and peripheral nerve stimulation. To assess the spatial facilitation, electromyograms were recorded from the biceps brachii muscles (BB) of healthy subjects. Transcranial magnetic stimulation (TMS) over the contralateral primary motor cortex and electrical stimulation of the ipsilateral ulnar nerve at the wrist were delivered either separately or together, with interstimulus intervals of 10 ms (TMS behind)...
2017: PloS One
https://www.readbyqxmd.com/read/28388464/transcranial-magnetic-stimulation-for-treatment-resistant-depression-naturalistic-treatment-outcomes-for-younger-versus-older-patients
#17
Christine A Conelea, Noah S Philip, Agustin G Yip, Jennifer L Barnes, Matthew J Niedzwiecki, Benjamin D Greenberg, Audrey R Tyrka, Linda L Carpenter
BACKGROUND: Repetitive transcranial magnetic stimulation (TMS) has been shown to be safe and effective for treatment-resistant depression (TRD) in the general adult population. Efficacy among older (≥60 years) patients, who have a greater burden of cognitive, physical, and functional impairment compared to their younger counterparts, remains unclear. The current study aimed to characterize antidepressant response to an acute course of TMS therapy among patients aged ≥60 years compared to those <60 years in naturalistic clinical practice settings...
March 29, 2017: Journal of Affective Disorders
https://www.readbyqxmd.com/read/28385918/eight-weeks-of-local-vibration-training-increases-dorsiflexor-muscles-cortical-voluntary-activation
#18
Robin Souron, Adrien Farabet, Leonard Féasson, Alain Belli, Guillaume Y Millet, Thomas Lapole
The aim of this study was to evaluate the effects of an 8-week local vibration training (LVT) program on functional and corticospinal properties of dorsiflexor muscles. Forty-four young subjects were allocated to a training (VIB, n = 22) or control (CON, n = 22) group. The VIB group performed twenty-four 1-h sessions (3 sessions/week) of 100-Hz vibration applied to the right tibialis anterior (TA). Both legs were tested in each group before training (PRE), after 4 (MID) and 8 (POST) weeks of training, and two weeks after training (POST2W)...
April 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28385535/tms-measures-of-motor-cortex-function-after-stroke-a-meta-analysis
#19
REVIEW
Michelle N McDonnell, Cathy M Stinear
BACKGROUND: Transcranial magnetic stimulation (TMS) is commonly used to measure the effects of stroke on corticomotor excitability, intracortical function, and interhemispheric interactions. The interhemispheric inhibition model posits that recovery of motor function after stroke is linked to rebalancing of asymmetric interhemispheric inhibition and corticomotor excitability. This model forms the rationale for using neuromodulation techniques to suppress unaffected motor cortex excitability, and facilitate affected motor cortex excitability...
March 23, 2017: Brain Stimulation
https://www.readbyqxmd.com/read/28384347/the-impact-of-early-visual-cortex-transcranial-magnetic-stimulation-on-visual-working-memory-precision-and-guess-rate
#20
Rosanne L Rademaker, Vincent G van de Ven, Frank Tong, Alexander T Sack
Neuroimaging studies have demonstrated that activity patterns in early visual areas predict stimulus properties actively maintained in visual working memory. Yet, the mechanisms by which such information is represented remain largely unknown. In this study, observers remembered the orientations of 4 briefly presented gratings, one in each quadrant of the visual field. A 10Hz Transcranial Magnetic Stimulation (TMS) triplet was applied directly at stimulus offset, or midway through a 2-second delay, targeting early visual cortex corresponding retinotopically to a sample item in the lower hemifield...
2017: PloS One
keyword
keyword
1176
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"