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Unsupervised, piecewise linear decoding enables an accurate prediction of muscle activity in a multi-task brain computer interface.
J Neural Eng
January 2025
Department of Neuroscience, Northwestern University, 303 East Chicago Ave, Chicago, Illinois, 60611, UNITED STATES.
Objective: Creating an intracortical brain-computer interface (iBCI) capable of seamless transitions between tasks and contexts would greatly enhance user experience. However, the nonlinearity in neural activity presents challenges to computing a global iBCI decoder. We aimed to develop a method that differs from a globally optimized decoder to address this issue.
View Article and Find Full Text PDFDetermining the effects of transcranial alternating current stimulation on corticomotor excitability and motor performance: A sham-controlled comparison of four frequencies.
Neuroscience
January 2025
Monash Exercise Neuroplasticity Research Unit, Department of Physiotherapy, School of Primary and Allied Health Care, Faculty of Medicine, Nursing and Health Science, Monash University, Melbourne Australia. Electronic address:
Transcranial alternating current stimulation (tACS) modulates brain oscillations and corticomotor plasticity. We examined the effects of four tACS frequencies (20 Hz, 40 Hz, 60 Hz, and 80 Hz) on motor cortex (M1) excitability and motor performance. In a randomised crossover design, 12 adults received 20-minute tACS sessions, with Sham as control.
View Article and Find Full Text PDFNeuroplasticity in the motor cortex following the achievement of sufficient motor learning.
Neurosci Lett
January 2025
Laboratory of Neurorehabilitation, Department of Occupational Therapy, Biwako Professional University of Rehabilitation, 967 Kitasaka, Higashiomi, Shiga 527-0145, Japan.
Skilled motor training causes the cortical representation of the trained body parts to expand into regions of the motor cortex related to other body parts. However, the effect of neuroplastic changes on the neurons originally existing within the expanded area is not well understood. In this study, the extent of the neuroplastic changes after achieving sufficient motor learning and the impact of the expansion on the neurons related to movements of other body parts were investigated.
View Article and Find Full Text PDFSystemically administered platelet-inspired nanoparticles to reduce inflammation surrounding intracortical microelectrodes.
Biomaterials
January 2025
Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH, United States; Advanced Platform Technology Center, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, OH, United States. Electronic address:
Intracortical microelectrodes (IMEs) are essential for neural signal acquisition in neuroscience and brain-machine interface (BMI) systems, aiding patients with neurological disorders, paralysis, and amputations. However, IMEs often fail to maintain robust signal quality over time, partly due to neuroinflammation caused by vascular damage during insertion. Platelet-inspired nanoparticles (PIN), which possess injury-targeting functions, mimic the adhesion and aggregation of active platelets through conjugated collagen-binding peptides (CBP), von Willebrand Factor-binding peptides (VBP), and fibrinogen-mimetic peptides (FMP).
View Article and Find Full Text PDFBrief periods of visual deprivation in adults increase performance on auditory tasks.
iScience
November 2024
Department of Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
Plastic changes in the brain are primarily limited to early postnatal periods. Recovery of adult brain plasticity is critical for the effective development of therapies. A brief (1-2 weeks) duration of visual deprivation (dark exposure, DE) in adult mice can trigger functional plasticity of thalamocortical and intracortical circuits in the primary auditory cortex suggesting improved sound processing.
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