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Transcranial magnetic stimulation, TMS

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https://www.readbyqxmd.com/read/27919314/advances-in-the-neuroscience-of-intelligence-from-brain-connectivity-to-brain-perturbation
#1
Emiliano Santarnecchi, Simone Rossi
Our view is that intelligence, as expression of the complexity of the human brain and of its evolutionary path, represents an intriguing example of "system level brain plasticity": tangible proofs of this assertion lie in the strong links intelligence has with vital brain capacities as information processing (i.e., pure, rough capacity to transfer information in an efficient way), resilience (i.e., the ability to cope with loss of efficiency and/or loss of physical elements in a network) and adaptability (i...
December 6, 2016: Spanish Journal of Psychology
https://www.readbyqxmd.com/read/27911366/a-multimodal-imaging-and-stimulation-based-method-of-evaluating-connectivity-related-brain-excitability-in-patients-with-epilepsy
#2
Mouhsin M Shafi, Susan Whitfield-Gabrieli, Catherine J Chu, Alvaro Pascual-Leone, Bernard S Chang
Resting-state functional connectivity MRI (rs-fcMRI) is a technique that identifies connectivity between different brain regions based on correlations over time in the blood-oxygenation level dependent signal. rs-fcMRI has been applied extensively to identify abnormalities in brain connectivity in different neurologic and psychiatric diseases. However, the relationship among rs-fcMRI connectivity abnormalities, brain electrophysiology and disease state is unknown, in part because the causal significance of alterations in functional connectivity in disease pathophysiology has not been established...
November 13, 2016: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/27909453/the-effect-of-high-frequency-repetitive-transcranial-magnetic-stimulation-on-occupational-stress-among-health-care-workers-a-pilot-study
#3
Young In Kim, Sun Mi Kim, Hyungjin Kim, Doug Hyun Han
OBJECTIVE: Repetitive transcranial magnetic stimulation (rTMS) was approved by the Food and Drug Administration to alleviate symptoms of treatment-resistant depression. This study aimed to evaluate the effectiveness of rTMS treatment on alleviating occupational stress by evaluating clinical symptoms and quantitative electroencephalography (QEEG). METHODS: Twenty-four health care workers were randomized to receive 12 sessions of active or sham rTMS delivered to the left dorsolateral prefrontal cortex (DLPFC)...
November 2016: Psychiatry Investigation
https://www.readbyqxmd.com/read/27909072/the-mirror-illusion-increases-motor-cortex-excitability-in-children-with-and-without-hemiparesis
#4
Sebastian Grunt, Christopher J Newman, Stefanie Saxer, Maja Steinlin, Christian Weisstanner, Alain Kaelin-Lang
Background Mirror therapy provides a visual illusion of a normal moving limb by using the mirror reflection of the unaffected arm instead of viewing the paretic limb and is used in rehabilitation to improve hand function. Little is known about the mechanism underlying its effect in children with hemiparesis. Objective To investigate the effect of the mirror illusion (MI) on the excitability of the primary motor cortex (M1) in children and adolescents. Methods Twelve patients with hemiparesis (10-20 years) and 8 typically developing subjects (8-17 years) participated...
November 30, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27895926/non-invasive-brain-stimulation-as-a-tool-to-study-cerebellar-m1-interactions-in-humans
#5
REVIEW
Sara Tremblay, Duncan Austin, Ricci Hannah, John C Rothwell
The recent development of non-invasive brain stimulation techniques such as transcranial magnetic stimulation (TMS) has allowed the non-invasive assessment of cerebellar function in humans. Early studies showed that cerebellar activity, as reflected in the excitability of the dentate-thalamo-cortical pathway, can be assessed with paired stimulation of the cerebellum and the primary motor cortex (M1) (cerebellar inhibition of motor cortex, CBI). Following this, many attempts have been made, using techniques such as repetitive TMS and transcranial electrical stimulation (TES), to modulate the activity of the cerebellum and the dentate-thalamo-cortical output, and measure their impact on M1 activity...
2016: Cerebellum & Ataxias
https://www.readbyqxmd.com/read/27891079/contribution-of-tms-and-rtms-in-the-understanding-of-the-pathophysiology-and-in-the-treatment-of-dystonia
#6
REVIEW
Pierre Lozeron, Aurélia Poujois, Alexandra Richard, Sana Masmoudi, Elodie Meppiel, France Woimant, Nathalie Kubis
Dystonias represent a heterogeneous group of movement disorders responsible for sustained muscle contraction, abnormal postures, and muscle twists. It can affect focal or segmental body parts or be generalized. Primary dystonia is the most common form of dystonia but it can also be secondary to metabolic or structural dysfunction, the consequence of a drug's side-effect or of genetic origin. The pathophysiology is still not elucidated. Based on lesion studies, dystonia has been regarded as a pure motor dysfunction of the basal ganglia loop...
2016: Frontiers in Neural Circuits
https://www.readbyqxmd.com/read/27885162/contralesional-corticomotor-neurophysiology-in-hemiparetic-children-with-perinatal-stroke-developmental-plasticity-and-clinical-function
#7
Ephrem Zewdie, Omar Damji, Patrick Ciechanski, Trevor Seeger, Adam Kirton
Background Perinatal stroke causes most hemiparetic cerebral palsy. Ipsilateral connections from nonlesioned hemisphere to affected hand are common. The nonlesioned primary motor cortex (M1) determines function and is a potential therapeutic target but its neurophysiology is poorly understood. Objective We aimed to characterize the neurophysiological properties of the nonlesioned M1 in children with perinatal stroke and their relationship to clinical function. Methods Fifty-two participants with hemiparetic cerebral palsy and magnetic resonance imaging-confirmed perinatal stroke and 40 controls aged 8 to 18 years completed the same transcranial magnetic stimulation (TMS) protocol...
November 23, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27884757/the-role-of-hearing-ability-and-speech-distortion-in-the-facilitation-of-articulatory-motor-cortex
#8
Helen E Nuttall, Daniel Kennedy-Higgins, Joseph T Devlin, Patti Adank
Excitability of articulatory motor cortex is facilitated when listening to speech in challenging conditions. Beyond this, however, we have little knowledge of what listener-specific and speech-specific factors engage articulatory facilitation during speech perception. For example, it is unknown whether speech motor activity is independent or dependent on the form of distortion in the speech signal. It is also unknown if speech motor facilitation is moderated by hearing ability. We investigated these questions in two experiments...
November 21, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27881958/motor-cortex-neurostimulation-technologies-for-chronic-post-stroke-pain-implications-of-tissue-damage-on-stimulation-currents
#9
Anthony T O'Brien, Rivadavio Amorim, R Jarrett Rushmore, Uri Eden, Linda Afifi, Laura Dipietro, Timothy Wagner, Antoni Valero-Cabré
Background: Central post stroke pain (CPSP) is a highly refractory syndrome that can occur after stroke. Primary motor cortex (M1) brain stimulation using epidural brain stimulation (EBS), transcranial magnetic stimulation (TMS), and transcranial direct current stimulation (tDCS) have been explored as potential therapies for CPSP. These techniques have demonstrated variable clinical efficacy. It is hypothesized that changes in the stimulating currents that are caused by stroke-induced changes in brain tissue conductivity limit the efficacy of these techniques...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27876534/transcranial-magnetic-stimulation-modifies-astrocytosis-cell-density-and-lipopolysaccharide-levels-in-experimental-autoimmune-encephalomyelitis
#10
Francisco J Medina-Fernández, Evelio Luque, Macarena Aguilar-Luque, Eduardo Agüera, Montserrat Feijóo, Fe I García-Maceira, Begoña M Escribano, Álvaro Pascual-Leone, René Drucker-Colín, Isaac Túnez
AIMS: Experimental autoimmune encephalomyelitis (EAE) is considered a valid experimental model for multiple sclerosis, a chronic neuroinflammatory condition of the central nervous system. Additionally, some evidence has shown that some microbial products such as the bacterial lipopolysaccharide could lead to the activation of reactive immune cells, triggering neuroinflammation. Several studies have found that transcranial magnetic stimulation (TMS) may exert a neuroprotective effect. Therefore, we aimed to assess the effect of TMS on the neuroinflammation occurring in EAE...
November 19, 2016: Life Sciences
https://www.readbyqxmd.com/read/27875942/a-combined-study-of-meg-and-pico-tesla-tms-on-children-with-autism-disorder
#11
Photios Anninos, Athanasios Chatzimichael, Adam Adamopoulos, Athanasia Kotini, Nicolaos Tsagas
Magnetoencephalographic (MEG) recordings from the brain of 10 children with autism (6 boys and 4 girls, with ages range from 5-12 years, mean[Formula: see text][Formula: see text][Formula: see text]SD: 8.3[Formula: see text][Formula: see text][Formula: see text]2.1) were obtained using a whole-head 122-channel MEG system in a magnetically shielded room of low magnetic noise. A double-blind experimental design was used in order to look for possible effect of external pico-Tesla Transcranial Magnetic Stimulation (pT-TMS)...
November 23, 2016: Journal of Integrative Neuroscience
https://www.readbyqxmd.com/read/27869996/efficacy-of-noninvasive-brain-stimulation-on-pain-control-in-migraine-patients-a-systematic-review-and-meta-analysis
#12
REVIEW
Lívia Shirahige, Lorena Melo, Fernanda Nogueira, Sérgio Rocha, Kátia Monte-Silva
OBJECTIVE: To evaluate the efficacy of noninvasive brain stimulation (NIBS) on pain control in migraine patients. BACKGROUND: Recent studies have used NIBS as an abortive and prophylactic treatment for migraine; however, its efficacy regarding meaningful clinical effects remains to be critically analyzed. DESIGN: Systematic review of controlled clinical trials. METHODS: Searches were conducted in six databases: MEDLINE (via PubMed), LILACS (via BIREME), CINAHL (via EBSCO), Scopus (via EBSCO), Web of Science, and CENTRAL...
November 2016: Headache
https://www.readbyqxmd.com/read/27865968/the-dorsomedial-prefrontal-cortex-plays-a-causal-role-in-mediating-in-group-advantage-in-emotion-recognition-a-tms-study
#13
L Gamond, Z Cattaneo
Consistent evidence suggests that emotional facial expressions are better recognized when the expresser and the perceiver belong to the same social group (in-group advantage). In this study, we used transcranial magnetic stimulation (TMS) to investigate the possible causal involvement of the dorsomedial prefrontal cortex (dmPFC) and of the right temporo-parietal junction (TPJ), two main nodes of the mentalizing neural network, in mediating the in-group advantage in emotion recognition. Participants performed an emotion discrimination task in a minimal (blue/green) group paradigm...
November 16, 2016: Neuropsychologia
https://www.readbyqxmd.com/read/27858095/-new-aspects-of-neurorehabilitation-motor-and-language
#14
J Liepert, C Breitenstein
Advancements in medical care over the last decades have contributed to a continuous decline in immediate post-stroke mortality. The flipside of this development is that patients surviving the initial stroke are forced to live with sometimes extreme functional motor and/or language limitations for the remaining life span. The following overview presents evidence-based neurorehabilitative interventions to promote motor and language recovery in the acute and chronic post-stroke stages. Therapeutic approaches comprise intensive training, neuropharmacological drugs and non-invasive brain stimulation techniques, such as transcranial magnetic stimulation (TMS) or direct current stimulation (tDCS)...
December 2016: Der Nervenarzt
https://www.readbyqxmd.com/read/27857687/transcranial-alternating-current-stimulation-at-beta-frequency-lack-of-immediate-effects-on-excitation-and-interhemispheric-inhibition-of-the-human-motor-cortex
#15
Viola Rjosk, Elisabeth Kaminski, Maike Hoff, Christopher Gundlach, Arno Villringer, Bernhard Sehm, Patrick Ragert
Transcranial alternating current stimulation (tACS) is a form of noninvasive brain stimulation and is capable of influencing brain oscillations and cortical networks. In humans, the endogenous oscillation frequency in sensorimotor areas peaks at 20 Hz. This beta-band typically occurs during maintenance of tonic motor output and seems to play a role in interhemispheric coordination of movements. Previous studies showed that tACS applied in specific frequency bands over primary motor cortex (M1) or the visual cortex modulates cortical excitability within the stimulated hemisphere...
2016: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/27856938/does-corticospinal-tract-connectivity-influence-the-response-to-intensive-bimanual-therapy-in-children-with-unilateral-cerebral-palsy
#16
Ana R P Smorenburg, Andrew M Gordon, Hsing-Ching Kuo, Claudio L Ferre, Marina Brandao, Yannick Bleyenheuft, Jason B Carmel, Kathleen M Friel
Background Reorganization of the corticospinal tract (CST) can occur in unilateral spastic cerebral palsy (USCP). The affected hand can be controlled via (1) typical contralateral projections from the lesioned hemisphere, (2) ipsilateral projections from the nonlesioned hemisphere, and (3) a combination of contralateral and ipsilateral projections (ie, bilateral). Intensive bimanual therapy and constraint-induced movement therapy (CIMT) improve hand function of children with USCP. Earlier it was suggested that the CST connectivity pattern may influence the efficacy of CIMT...
November 17, 2016: Neurorehabilitation and Neural Repair
https://www.readbyqxmd.com/read/27851906/magpy-a-python-toolbox-for-controlling-magstim-transcranial-magnetic-stimulators
#17
Nicolas A McNair
BACKGROUND: To date, transcranial magnetic stimulation (TMS) studies manipulating stimulation parameters have largely used blocked paradigms. However, altering these parameters on a trial-by-trial basis in Magstim stimulators is complicated by the need to send regular (1Hz) commands to the stimulator. Additionally, effecting such control interferes with the ability to send TMS pulses or simultaneously present stimuli with high-temporal precision. NEW METHOD: This manuscript presents the MagPy toolbox, a Python software package that provides full control over Magstim stimulators via the serial port...
November 13, 2016: Journal of Neuroscience Methods
https://www.readbyqxmd.com/read/27847710/prediction-of-motor-recovery-using-quantitative-parameters-of-motor-evoked-potential-in-patients-with-stroke
#18
Jae Yong Jo, Ahee Lee, Min Su Kim, Eunhee Park, Won Hyuk Chang, Yong-Il Shin, Yun-Hee Kim
OBJECTIVE: To investigate the clinical significance of quantitative parameters in transcranial magnetic stimulation (TMS)-induced motor evoked potentials (MEP) which can be adopted to predict functional recovery of the upper limb in stroke patients in the early subacute phase. METHODS: One hundred thirteen patients (61 men, 52 women; mean age 57.8±12.2 years) who suffered faiarst-ever stroke were included in this study. All participants underwent TMS-induced MEP session to assess the corticospinal excitability of both hand motor cortices within 3 weeks after stroke onset...
October 2016: Annals of Rehabilitation Medicine
https://www.readbyqxmd.com/read/27832607/role-of-human-premotor-dorsal-region-in-learning-a-conditional-visuo-motor-task
#19
Pranav J Parikh, Marco Santello
Conditional learning is an important component of our everyday activities, e.g. handling a phone or sorting work files and requires identification of the arbitrary stimulus, accurate selection of the motor response, monitoring of the response, and storing in memory the stimulus-response association for future recall. Learning this type of conditional visuo-motor task appears to engage the premotor dorsal region (PMd). However, the extent to which PMd might be involved in specific or all processes of conditional learning is not well understood...
November 2, 2016: Journal of Neurophysiology
https://www.readbyqxmd.com/read/27832593/parietal-area-ba7-integrates-motor-programs-for-reaching-grasping-and-bimanual-coordination
#20
Ada Le, Mike Vesia, Xiaogang Yan, J Douglas Crawford, Matthias Niemeier
Skillful interaction with the world requires that the brain uses a multitude of sensorimotor programs and subroutines such as for reaching, grasping, and the coordination of the two body halves. However, it is unclear how these programs operate together. Networks for reaching, grasping, and bimanual coordination might converge in common brain areas. For example, Brodmann Area 7 (BA7) is known to activate in disparate tasks involving the three types of movements separately. Here we asked whether BA7 plays a key role in integrating coordinated reach-to-grasp movements for both arms together...
November 9, 2016: Journal of Neurophysiology
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