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Author Leonardo G Cohen

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Statistical learning occurs during practice while high-order rule learning during rest period.

Romain Quentin, Lison Fanuel, Mariann Kiss, Marine Vernet, Teodóra Vékony, Karolina Janacsek, Leonardo G Cohen, Dezso Nemeth,

Knowing when the brain learns is crucial for both the comprehension of memory formation and consolidation and for developing new training and neurorehabilitation strategies in healthy and patient populations. Recently, a rapid form of offline learning developing during short rest periods has been shown to account for most of procedural ... Read more >>

NPJ Sci Learn (NPJ science of learning)
[2021, 6(1):14]

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The prevalence of the Val66Met polymorphism in musicians: Possible evidence for compensatory neuroplasticity from a pilot study.

Tara L Henechowicz, Joyce L Chen, Leonardo G Cohen, Michael H Thaut,

The study compared the prevalence of the Val66Met Brain-derived Neurotrophic Factor single nucleotide polymorphism (rs6265) in a sample of musicians (N = 50) to an ethnically matched general population sample from the 1000 Human Genome Project (N = 424). Met-carriers of the polymorphism (Val/Met and Met/Met genotypes) are typically present ... Read more >>

PLoS One (PloS one)
[2021, 16(6):e0245107]

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Consolidation of human skill linked to waking hippocampo-neocortical replay.

Ethan R Buch, Leonardo Claudino, Romain Quentin, Marlene Bönstrup, Leonardo G Cohen,

The introduction of rest intervals interspersed with practice strengthens wakeful consolidation of skill. The mechanisms by which the brain binds discrete action representations into consolidated, highly temporally resolved skill sequences during waking rest are not known. To address this question, we recorded magnetoencephalography (MEG) during acquisition and rapid consolidation of ... Read more >>

Cell Rep (Cell reports)
[2021, 35(10):109193]

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Phase-dependent offline enhancement of human motor memory.

Sara J Hussain, Mary K Vollmer, Jessica Stimely, Gina Norato, Christoph Zrenner, Ulf Ziemann, Ethan R Buch, Leonardo G Cohen,

<h4>Background</h4>Skill learning engages offline activity in the primary motor cortex (M1). Sensorimotor cortical activity oscillates between excitatory trough and inhibitory peak phases of the mu (8-12 Hz) rhythm. We recently showed that these mu phases influence the magnitude and direction of neuroplasticity induction within M1. However, the contribution of M1 activity ... Read more >>

Brain Stimul (Brain stimulation)
[2021, 14(4):873-883]

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Crowdsourcing in Cognitive and Systems Neuroscience.

Brian P Johnson, Eran Dayan, Nitzan Censor, Leonardo G Cohen,

Behavioral research in cognitive and human systems neuroscience has been largely carried out in-person in laboratory settings. Underpowering and lack of reproducibility due to small sample sizes have weakened conclusions of these investigations. In other disciplines, such as neuroeconomics and social sciences, crowdsourcing has been extensively utilized as a data ... Read more >>

Neuroscientist (The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry)
[2021, :10738584211017018]

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The Intersection of Offline Learning and Rehabilitation.

Brian P Johnson, Leonardo G Cohen, Kelly P Westlake,

Front Hum Neurosci (Frontiers in human neuroscience)
[2021, 15:667574]

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Induction of LTD-like corticospinal plasticity by low-frequency rTMS depends on pre-stimulus phase of sensorimotor μ-rhythm.

David Baur, Dragana Galevska, Sara Hussain, Leonardo G Cohen, Ulf Ziemann, Christoph Zrenner,

<h4>Background</h4>Neural oscillations reflect rapidly changing brain excitability states. We have demonstrated previously with EEG-triggered transcranial magnetic stimulation (TMS) of human motor cortex that the positive vs. negative peak of the sensorimotor μ-oscillation reflect corticospinal low-vs. high-excitability states. In vitro experiments showed that induction of long-term depression (LTD) by low-frequency stimulation depends ... Read more >>

Brain Stimul (Brain stimulation)
[2020, 13(6):1580-1587]

Cited: 1 time

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Phase-dependent transcranial magnetic stimulation of the lesioned hemisphere is accurate after stroke.

Sara J Hussain, William Hayward, Farah Fourcand, Christoph Zrenner, Ulf Ziemann, Ethan R Buch, Margaret K Hayward, Leonardo G Cohen,

Brain Stimul (Brain stimulation)
[2020, 13(5):1354-1357]

Cited: 0 times

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Mechanisms of offline motor learning at a microscale of seconds in large-scale crowdsourced data.

Marlene Bönstrup, Iñaki Iturrate, Martin N Hebart, Nitzan Censor, Leonardo G Cohen,

Performance improvements during early human motor skill learning are suggested to be driven by short periods of rest during practice, at the scale of seconds. To reveal the unknown mechanisms behind these "micro-offline" gains, we leveraged the sampling power offered by online crowdsourcing (cumulative <i>N</i> over all experiments = 951). First, we ... Read more >>

NPJ Sci Learn (NPJ science of learning)
[2020, 5:7]

Cited: 4 times

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Treatment of Upper Limb Paresis With Repetitive Peripheral Nerve Sensory Stimulation and Motor Training: Study Protocol for a Randomized Controlled Trial.

Adriana B Conforto, André G Machado, Isabella Menezes, Nathalia H V Ribeiro, Rafael Luccas, Danielle S Pires, Claudia da Costa Leite, Ela B Plow, Leonardo G Cohen,

Background: Repetitive peripheral nerve sensory stimulation (RPSS) has emerged as a potential adjuvant strategy to motor training in stroke rehabilitation. The aim of this study is to test the hypothesis that 3 h sessions of active RPSS associated with functional electrical stimulation (FES) and task-specific training (TST) distributed three times ... Read more >>

Front Neurol (Frontiers in neurology)
[2020, 11:196]

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Beta rhythm events predict corticospinal motor output.

Sara J Hussain, Leonardo G Cohen, Marlene Bönstrup,

The beta rhythm (15-30 Hz) is a prominent signal of sensorimotor cortical activity. This rhythm is not sustained but occurs non-rhythmically as brief events of a few (1-2) oscillatory cycles. Recent work on the relationship between these events and sensorimotor performance suggests that they are the biologically relevant elements of the ... Read more >>

Sci Rep (Scientific reports)
[2019, 9(1):18305]

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Low-Frequency Brain Oscillations Track Motor Recovery in Human Stroke.

Marlene Bönstrup, Lutz Krawinkel, Robert Schulz, Bastian Cheng, Jan Feldheim, Götz Thomalla, Leonardo G Cohen, Christian Gerloff,

<h4>Objective</h4>The majority of patients with stroke survive the acute episode and live with enduring disability. Effective therapies to support recovery of motor function after stroke are yet to be developed. Key to this development is the identification of neurophysiologic signals that mark recovery and are suitable and susceptible to interventional ... Read more >>

Ann Neurol (Annals of neurology)
[2019, 86(6):853-865]

Cited: 5 times

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Transcranial direct current stimulation facilitates response inhibition through dynamic modulation of the fronto-basal ganglia network.

Marco Sandrini, Benjamin Xu, Rita Volochayev, Oluwole Awosika, Wen-Tung Wang, John A Butman, Leonardo G Cohen,

<h4>Background</h4>Response inhibition refers to the ability to stop an on-going action quickly when it is no longer appropriate. Previous studies showed that transcranial direct current stimulation (tDCS) applied with the anode over the right inferior frontal cortex (rIFC), a critical node of the fronto-basal ganglia inhibitory network, improved response inhibition. ... Read more >>

Brain Stimul (Brain stimulation)
[2020, 13(1):96-104]

Cited: 2 times

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Sensorimotor Oscillatory Phase-Power Interaction Gates Resting Human Corticospinal Output.

Sara J Hussain, Leonardo Claudino, Marlene Bönstrup, Gina Norato, Gabriel Cruciani, Ryan Thompson, Christoph Zrenner, Ulf Ziemann, Ethan Buch, Leonardo G Cohen,

Oscillatory activity within sensorimotor networks is characterized by time-varying changes in phase and power. The influence of interactions between sensorimotor oscillatory phase and power on human motor function, like corticospinal output, is unknown. We addressed this gap in knowledge by delivering transcranial magnetic stimulation (TMS) to the human motor cortex ... Read more >>

Cereb Cortex (Cerebral cortex (New York, N.Y. : 1991))
[2019, 29(9):3766-3777]

Cited: 6 times

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Reversing working memory decline in the elderly.

Romain Quentin, Leonardo G Cohen,

Nat Neurosci (Nature neuroscience)
[2019, 22(5):686-688]

Cited: 1 time

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Differential Brain Mechanisms of Selection and Maintenance of Information during Working Memory.

Romain Quentin, Jean-Rémi King, Etienne Sallard, Nathan Fishman, Ryan Thompson, Ethan R Buch, Leonardo G Cohen,

Working memory is our ability to select and temporarily hold information as needed for complex cognitive operations. The temporal dynamics of sustained and transient neural activity supporting the selection and holding of memory content is not known. To address this problem, we recorded magnetoencephalography in healthy participants performing a retro-cue ... Read more >>

J Neurosci (The Journal of neuroscience : the official journal of the Society for Neuroscience)
[2019, 39(19):3728-3740]

Cited: 11 times

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Transcutaneous spinal direct current stimulation improves locomotor learning in healthy humans.

Oluwole O Awosika, Marco Sandrini, Rita Volochayev, Ryan M Thompson, Nathan Fishman, Tianxia Wu, Mary Kay Floeter, Mark Hallett, Leonardo G Cohen,

<h4>Background</h4>Ambulation is an essential aspect of daily living and is often impaired after brain and spinal cord injuries. Despite the implementation of standard neurorehabilitative care, locomotor recovery is often incomplete.<h4>Objective</h4>In this randomized, sham-controlled, double-blind, parallel design study, we aimed to determine if anodal transcutaneous spinal direct current stimulation (anodal tsDCS) ... Read more >>

Brain Stimul (Brain stimulation)
[2019, 12(3):628-634]

Cited: 6 times

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A Rapid Form of Offline Consolidation in Skill Learning.

Marlene Bönstrup, Iñaki Iturrate, Ryan Thompson, Gabriel Cruciani, Nitzan Censor, Leonardo G Cohen,

The brain strengthens memories through consolidation, defined as resistance to interference (stabilization) or performance improvements between the end of a practice session and the beginning of the next (offline gains) [1]. Typically, consolidation has been measured hours or days after the completion of training [2], but the same concept may ... Read more >>

Curr Biol (Current biology : CB)
[2019, 29(8):1346-1351.e4]

Cited: 15 times

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Plasticity and recovery of function.

Romain Quentin, Oluwole Awosika, Leonardo G Cohen,

The frontal lobe plays a crucial role in human motor behavior. It is one of the last areas of the brain to mature, especially the prefrontal regions. After a brief historical perspective on the perceived dichotomy between the view of the brain as a static organ and that of a ... Read more >>

Handb Clin Neurol (Handbook of clinical neurology)
[2019, 163:473-483]

Cited: 0 times

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Brain-Machine Interface in Chronic Stroke: Randomized Trial Long-Term Follow-up.

Ander Ramos-Murguialday, Marco R Curado, Doris Broetz, Özge Yilmaz, Fabricio L Brasil, Giulia Liberati, Eliana Garcia-Cossio, Woosang Cho, Andrea Caria, Leonardo G Cohen, Niels Birbaumer,

BACKGROUND:Brain-machine interfaces (BMIs) have been recently proposed as a new tool to induce functional recovery in stroke patients. OBJECTIVE:Here we evaluated long-term effects of BMI training and physiotherapy in motor function of severely paralyzed chronic stroke patients 6 months after intervention. METHODS:A total of 30 chronic stroke patients with severe ... Read more >>

Neurorehabil Neural Repair (Neurorehabilitation and neural repair)
[2019, 33(3):188-198]

Cited: 11 times

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Susceptibility of consolidated procedural memory to interference is independent of its active task-based retrieval.

Ella Gabitov, Arnaud Boutin, Basile Pinsard, Nitzan Censor, Stuart M Fogel, Geneviève Albouy, Bradley R King, Julie Carrier, Leonardo G Cohen, Avi Karni, Julien Doyon,

Reconsolidation theory posits that upon retrieval, consolidated memories are destabilized and need to be restabilized in order to persist. It has been suggested that experience with a competitive task immediately after memory retrieval may interrupt these restabilization processes leading to memory loss. Indeed, using a motor sequence learning paradigm, we ... Read more >>

PLoS One (PloS one)
[2019, 14(1):e0210876]

Cited: 2 times

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Correction: Brain-Computer Interface-Based Communication in the Completely Locked-In State.

Ujwal Chaudhary, Bin Xia, Stefano Silvoni, Leonardo G Cohen, Niels Birbaumer,

[This corrects the article DOI: 10.1371/journal.pbio.1002593.]. ... Read more >>

PLoS Biol (PLoS biology)
[2018, 16(12):e3000089]

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Repetitive Peripheral Sensory Stimulation and Upper Limb Performance in Stroke: A Systematic Review and Meta-analysis.

Adriana Bastos Conforto, Sarah Monteiro Dos Anjos, Wanderley Marques Bernardo, Arnaldo Alves da Silva, Juliana Conti, André G Machado, Leonardo G Cohen,

<h4>Background</h4>Enhancement of sensory input in the form of repetitive peripheral sensory stimulation (RPSS) can enhance excitability of the motor cortex and upper limb performance.<h4>Objective</h4>To perform a systematic review and meta-analysis of effects of RPSS compared with control stimulation on improvement of motor outcomes in the upper limb of subjects with ... Read more >>

Neurorehabil Neural Repair (Neurorehabilitation and neural repair)
[2018, 32(10):863-871]

Cited: 4 times

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Distributed cortical structural properties contribute to motor cortical excitability and inhibition.

Eran Dayan, Virginia López-Alonso, Sook-Lei Liew, Leonardo G Cohen,

The link between the local structure of the primary motor cortex and motor function has been well documented. However, motor function relies on a network of interconnected brain regions and the link between the structural properties characterizing these distributed brain networks and motor function remains poorly understood. Here, we examined ... Read more >>

Brain Struct Funct (Brain structure & function)
[2018, 223(8):3801-3812]

Cited: 2 times

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Transcranial Direct Current Stimulation Enhances Motor Skill Learning but Not Generalization in Chronic Stroke.

Manuela Hamoudi, Heidi M Schambra, Brita Fritsch, Annika Schoechlin-Marx, Cornelius Weiller, Leonardo G Cohen, Janine Reis,

<h4>Background</h4>Motor training alone or combined with transcranial direct current stimulation (tDCS) positioned over the motor cortex (M1) improves motor function in chronic stroke. Currently, understanding of how tDCS influences the process of motor skill learning after stroke is lacking.<h4>Objective</h4>To assess the effects of tDCS on the stages of motor skill ... Read more >>

Neurorehabil Neural Repair (Neurorehabilitation and neural repair)
[2018, 32(4-5):295-308]

Cited: 9 times

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