keyword
MENU ▼
Read by QxMD icon Read
search

Transcranial alternating current stimulation

keyword
https://www.readbyqxmd.com/read/29675810/neurostimulation-for-memory-enhancement-in-epilepsy
#1
REVIEW
Stephen Meisenhelter, Barbara C Jobst
PURPOSE OF REVIEW: Memory is one of the top concerns of epilepsy patients, but there are no known treatments to directly alleviate the memory deficits associated with epilepsy. Neurostimulation may provide new therapeutic tools to enhance memory in epilepsy patients. Here, we critically review recent investigations of memory enhancement using transcranial electrical stimulation (tES), transcranial magnetic stimulation (TMS), vagus nerve stimulation (VNS), chronic intracranial stimulation, and acute intracranial stimulation...
April 19, 2018: Current Neurology and Neuroscience Reports
https://www.readbyqxmd.com/read/29656907/opposite-effects-of-lateralised-transcranial-alpha-versus-gamma-stimulation-on-auditory-spatial-attention
#2
Malte Wöstmann, Johannes Vosskuhl, Jonas Obleser, Christoph S Herrmann
BACKGROUND: Spatial attention relatively increases the power of neural 10-Hz alpha oscillations in the hemisphere ipsilateral to attention, and decreases alpha power in the contralateral hemisphere. For gamma oscillations (>40 Hz), the opposite effect has been observed. The functional roles of lateralised oscillations for attention are currently unclear. HYPOTHESIS: If lateralised oscillations are functionally relevant for attention, transcranial stimulation of alpha versus gamma oscillations in one hemisphere should differentially modulate the accuracy of spatial attention to the ipsi-versus contralateral side...
April 6, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29655974/tacs-mediated-modulation-of-the-auditory-steady-state-response-as-seen-with-meg
#3
Petteri Hyvärinen, Dawoon Choi, Gianpaolo Demarchi, Antti A Aarnisalo, Nathan Weisz
BACKGROUND: Previous studies have shown that transcranial electrical stimulation can be successfully applied during simultaneous MEG measurements. In particular, using beamforming they have established that changes of stimulus induced as well as evoked activity can be inspected during transcranial alternating current stimulation (tACS). OBJECTIVE/HYPOTHESIS: We studied tACS-mediated changes of the auditory steady-state response (ASSR), hypothesizing that-due to the putatively inhibitory role of alpha oscillations-these evoked responses would be diminished...
March 28, 2018: Hearing Research
https://www.readbyqxmd.com/read/29649503/modulating-fluid-intelligence-performance-through-combined-cognitive-training-and-brain-stimulation
#4
Anna-Katharine Brem, Jessamy Norton-Ford Almquist, Karen Mansfield, Franziska Plessow, Francesco Sella, Emiliano Santarnecchi, Umut Orhan, James McKanna, Misha Pavel, Santosh Mathan, Nick Yeung, Alvaro Pascual-Leone, Roi Cohen Kadosh, On Behalf Of Honeywell Sharp Team Authors
It is debated whether cognitive training of specific executive functions leads to far transfer effects, such as improvements in fluid intelligence (Gf). Within this context, transcranial direct current stimulation and recently also novel protocols such as transcranial random noise and alternating current stimulation are being investigated with regards to their ability to enhance cognitive training outcomes. We compared the effects of four different transcranial electrical brain stimulation protocols in combination with nine daily computerized training sessions on Gf...
April 9, 2018: Neuropsychologia
https://www.readbyqxmd.com/read/29623027/preclinical-to-clinical-translation-of-studies-of-transcranial-direct-current-stimulation-in-the-treatment-of-epilepsy-a-systematic-review
#5
Gabriela G Regner, Patrícia Pereira, Douglas T Leffa, Carla de Oliveira, Rafael Vercelino, Felipe Fregni, Iraci L S Torres
Epilepsy is a chronic brain syndrome characterized by recurrent seizures resulting from excessive neuronal discharges. Despite the development of various new antiepileptic drugs, many patients are refractory to treatment and report side effects. Non-invasive methods of brain stimulation, such as transcranial direct current stimulation (tDCS), have been tested as alternative approaches to directly modulate the excitability of epileptogenic neural circuits. Although some pilot and initial clinical studies have shown positive results, there is still uncertainty regarding the next steps of investigation in this field...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29615855/null-effects-on-working-memory-and-verbal-fluency-tasks-when-applying-anodal-tdcs-to-the-inferior-frontal-gyrus-of-healthy-participants
#6
Samuel J Westwood, Cristina Romani
Transcranial direct current stimulation (tDCS) is a technique used to modify cognition by modulating underlying cortical excitability via weak electric current applied through the scalp. Although many studies have reported positive effects with tDCS, a number of recent studies highlight that tDCS effects can be small and difficult to reproduce. This is especially the case when attempting to modulate performance using single applications of tDCS in healthy participants. Possible reasons may be that optimal stimulation parameters have yet to be identified, and that individual variation in cortical activity and/or level of ability confound outcomes...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29615485/alpha-oscillations-are-causally-linked-to-inhibitory-abilities-in-ageing
#7
Giulia Borghini, Michela Candini, Cristina Filannino, Masud Hussain, Vincent Walsh, Vincenzo Romei, Nahid Zokaei, Marinella Cappelletti
Ageing adults typically show reduced ability to ignore task-irrelevant information, an essential skill for optimal performance in many cognitive operations, including those requiring working memory (WM) resources. In a first experiment, young and elderly human participants of both genders performed an established WM paradigm probing inhibitory abilities by means of valid, invalid and neutral retro-cues. Elderly participants showed an overall cost, especially in performing invalid trials while youngers' general performance was comparatively higher, as expected...
April 3, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29615367/boosting-the-ltp-like-plasticity-effect-of-intermittent-theta-burst-stimulation-using-gamma-transcranial-alternating-current-stimulation
#8
Andrea Guerra, Antonio Suppa, Matteo Bologna, Valentina D'Onofrio, Edoardo Bianchini, Peter Brown, Vincenzo Di Lazzaro, Alfredo Berardelli
BACKGROUND: Transcranial Alternating Current Stimulation (tACS) consists in delivering electric current to the brain using an oscillatory pattern that may entrain the rhythmic activity of cortical neurons. When delivered at gamma frequency, tACS modulates motor performance and GABA-A-ergic interneuron activity. OBJECTIVE: Since interneuronal discharges play a crucial role in brain plasticity phenomena, here we co-stimulated the primary motor cortex (M1) in healthy subjects by means of tACS during intermittent theta-burst stimulation (iTBS), a transcranial magnetic stimulation paradigm known to induce long-term potentiation (LTP)-like plasticity...
March 24, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29593608/no-evidence-for-phase-specific-effects-of-40-hz-hd-tacs-on-multiple-object-tracking
#9
Nicholas S Bland, Jason B Mattingley, Martin V Sale
Phase synchronization drives connectivity between neural oscillators, providing a flexible mechanism through which information can be effectively and selectively routed between task-relevant cortical areas. The ability to keep track of objects moving between the left and right visual hemifields, for example, requires the integration of information between the two cerebral hemispheres. Both animal and human studies have suggested that coherent (or phase-locked) gamma oscillations (30-80 Hz) might underlie this ability...
2018: Frontiers in Psychology
https://www.readbyqxmd.com/read/29588984/effect-of-neurostimulation-on-cognition-and-mood-in-refractory-epilepsy
#10
REVIEW
Alvin Y Chan, John D Rolston, Vikram R Rao, Edward F Chang
Epilepsy is a common, debilitating neurological disorder characterized by recurrent seizures. Mood disorders and cognitive deficits are common comorbidities in epilepsy that, like seizures, profoundly influence quality of life and can be difficult to treat. For patients with refractory epilepsy who are not candidates for resection, neurostimulation, the electrical modulation of epileptogenic brain tissue, is an emerging treatment alternative. Several forms of neurostimulation are currently available, and therapy selection hinges on relative efficacy for seizure control and amelioration of neuropsychiatric comorbidities...
March 2018: Epilepsia Open
https://www.readbyqxmd.com/read/29576498/evidence-of-transcranial-direct-current-stimulation-generated-electric-fields-at-subthalamic-level-in-human-brain-in-vivo
#11
Pratik Y Chhatbar, Steven A Kautz, Istvan Takacs, Nathan C Rowland, Gonzalo J Revuelta, Mark S George, Marom Bikson, Wuwei Feng
BACKGROUND: Transcranial direct current stimulation (tDCS) is a promising brain modulation technique for several disease conditions. With this technique, some portion of the current penetrates through the scalp to the cortex and modulates cortical excitability, but a recent human cadaver study questions the amount. This insufficient intracerebral penetration of currents may partially explain the inconsistent and mixed results in tDCS studies to date. Experimental validation of a transcranial alternating current stimulation-generated electric field (EF) in vivo has been performed on the cortical (using electrocorticography, ECoG, electrodes), subcortical (using stereo electroencephalography, SEEG, electrodes) and deeper thalamic/subthalamic levels (using DBS electrodes)...
March 13, 2018: Brain Stimulation
https://www.readbyqxmd.com/read/29569865/correction-yaple-et-al-transcranial-alternating-current-stimulation-modulates-risky-decision-making-in-a-frequency-controlled-experiment-eneuro-november-december-2017-4-6-e0136-17-2017-1-10-https-doi-org-10-1523-eneuro-0136-17-2017
#12
(no author information available yet)
[This corrects the article DOI: 10.1523/ENEURO.0136-17.2017.][This corrects the article DOI: 10.1523/ENEURO.0136-17.2017.].
January 2018: ENeuro
https://www.readbyqxmd.com/read/29563594/using-high-amplitude-and-focused-transcranial-alternating-current-stimulation-to-entrain-physiological-tremor
#13
Ahmad Khatoun, Jolien Breukers, Sara Op de Beeck, Ioana Gabriela Nica, Jean-Marie Aerts, Laura Seynaeve, Tom Haeck, Boateng Asamoah, Myles Mc Laughlin
Transcranial alternating current stimulation (tACS) is a noninvasive neuromodulation method that can entrain physiological tremor in healthy volunteers. We conducted two experiments to investigate the effectiveness of high-amplitude and focused tACS montages at entraining physiological tremor. Experiment 1 used saline-soaked sponge electrodes with an extra-cephalic return electrode and compared the effects of a motor (MC) and prefrontal cortex (PFC) electrode location. Average peak-amplitude was 1.925 mA...
March 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29561180/non-pharmacological-interventions-for-restless-legs-syndrome-a-systematic-review-of-randomised-controlled-trials
#14
Eloise G Harrison, Jennifer L Keating, Prue E Morgan
INTRODUCTION: Restless legs syndrome (RLS) is a sensorimotor disorder characterised by an uncomfortable urge to move the legs. Management is primarily pharmacological. Effects for non-pharmacological, non-surgical options are published but lack systematic examination. OBJECTIVES: To synthesise results of non-pharmacological/non-surgical treatment compared to no-treatment controls or alternative treatment for RLS on any relevant outcome. METHODS: Databases and reference lists of reviews were searched for randomised controlled trials (RCTs) comparing non-pharmacological treatment to alternative or no treatment controls for idiopathic RLS...
March 21, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29551661/transcranial-alternating-current-stimulation-at-alpha-frequency-reduces-pain-when-the-intensity-of-pain-is-uncertain
#15
Laura J Arendsen, Siobhan Hugh-Jones, Donna M Lloyd
Alpha activity directly before pain onset has been implicated in pain experience with higher pre-stimulus alpha associated with lower reported pain. However, expectations about pain intensity also seem to affect pre-stimulus alpha activity. To date, evidence for a relationship between alpha activity and pain experience has been largely correlational. Transcranial alternating current stimulation at alpha frequency (alpha tACS) permits direct manipulation of alpha activity and therefore an examination of the potential causal relationship between alpha activity and pain...
March 15, 2018: Journal of Pain: Official Journal of the American Pain Society
https://www.readbyqxmd.com/read/29538384/the-speed-of-parietal-theta-frequency-drives-visuospatial-working-memory-capacity
#16
Nina Wolinski, Nicholas R Cooper, Paul Sauseng, Vincenzo Romei
The speed of theta brain oscillatory activity is thought to play a key role in determining working memory (WM) capacity. Individual differences in the length of a theta cycle (ranging between 4 and 7 Hz) might determine how many gamma cycles (>30 Hz) can be nested into a theta wave. Gamma cycles are thought to represent single memory items; therefore, this interplay could determine individual memory capacity. We directly tested this hypothesis by means of parietal transcranial alternating current stimulation (tACS) set at slower (4 Hz) and faster (7 Hz) theta frequencies during a visuospatial WM paradigm...
March 14, 2018: PLoS Biology
https://www.readbyqxmd.com/read/29533819/randomized-trial-of-transcranial-alternating-current-stimulation-for-treatment-of-auditory-hallucinations-in-schizophrenia
#17
Juliann M Mellin, Sankaraleengam Alagapan, Caroline Lustenberger, Courtney E Lugo, Morgan L Alexander, John H Gilmore, L Fredrik Jarskog, Flavio Fröhlich
BACKGROUND: Approximately 30% of patients with schizophrenia experience auditory hallucinations that are refractory to antipsychotic medications. Here, we evaluated the feasibility and efficacy of transcranial alternating current stimulation (tACS) that we hypothesized would improve auditory hallucination symptoms by enhancing synchronization between the frontal and temporo-parietal areas of the left hemisphere. METHOD: 22 participants were randomized to one of three arms and received twice daily, 20 min sessions of sham, 10 Hz 2 mA peak-to-peak tACS, or 2 mA tDCS over the course of 5 consecutive days...
March 10, 2018: European Psychiatry: the Journal of the Association of European Psychiatrists
https://www.readbyqxmd.com/read/29501349/does-transcranial-direct-current-stimulation-during-writing-alleviate-upper-limb-freezing-in-people-with-parkinson-s-disease-a-pilot-study
#18
Sanne Broeder, Elke Heremans, Marcelo Pinto Pereira, Evelien Nackaerts, Raf Meesen, Geert Verheyden, Alice Nieuwboer
Transcranial direct current stimulation (tDCS) over the primary motor cortex (M1) can boost motor performance in Parkinson's disease (PD) when it is applied at rest. However, the potential supplementary therapeutic effect of the concurrent application of tDCS during the training of motor tasks is largely unknown. The present study examined the effects of tDCS on upper limb motor blocks during a freezing-provoking writing task (the funnel task) requiring up- and down-stroke movements at alternating amplitudes...
February 28, 2018: Human Movement Science
https://www.readbyqxmd.com/read/29499241/modulation-of-the-frontal-parietal-network-by-low-intensity-anti-phase-20-hz-transcranial-electrical-stimulation-boosts-performance-in-the-attentional-blink-task
#19
Zachary Yaple, Roman Vakhrushev
Performance in the attentional blink task has been demonstrated to be directly influenced by alpha and beta neural oscillatory activity. In two experiments we stimulated the right parietal cortex and left frontal cortex with transcranial alternating current stimulation. For the first experiment we targeted only the right parietal cortex and found a non-significant increase in performance from 20 Hz stimulation. In the second experiment we applied two stimulators to the right parietal and left frontal cortex and found a significant increase in performance from 20 Hz tACS with a phase difference of 180°...
February 27, 2018: International Journal of Psychophysiology
https://www.readbyqxmd.com/read/29493559/neurostimulation-for-drug-resistant-epilepsy-a-systematic-review-of-clinical-evidence-for-efficacy-safety-contraindications-and-predictors-for-response
#20
Paul Boon, Elien De Cock, Ann Mertens, Eugen Trinka
PURPOSE OF REVIEW: Neurostimulation is becoming an increasingly accepted treatment alternative for patients with drug-resistant epilepsy (DRE) who are unsuitable surgery candidates. Standardized guidelines on when or how to use the various neurostimulation modalities are lacking. We conducted a systematic review on the currently available neurostimulation modalities primarily with regard to effectiveness and safety. RECENT FINDINGS: For vagus nerve stimulation (VNS), there is moderate-quality evidence for its effectiveness in adults with drug-resistant partial epilepsies...
April 2018: Current Opinion in Neurology
keyword
keyword
47548
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"