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Response preparation is accomplished by gradual accumulation in neural activity until a threshold is reached. In humans, such a preparatory signal, referred to as the lateralized readiness potential, can be observed in the EEG over sensorimotor cortical areas before execution of a voluntary movement. Although well-described for manual movements, less is known about preparatory EEG potentials for saccadic eye movements in humans and nonhuman primates.
View Article and Find Full Text PDFThe big potassium (BK) channels remain open with a small limiting probability of ∼ 10 at minimal Ca and negative voltages < -100 mV. The molecular origin and functional significance of such "intrinsic opening" are not understood. Here we combine atomistic simulations and electrophysiological experiments to show that the intrinsic opening of BK channels is an inherent property of the vapor barrier, generated by hydrophobic dewetting of the BK inner pore in the deactivated state.
View Article and Find Full Text PDFTransdermal electrophysiological recordings of diet-induced small fiber peripheral neuropathy using a needle electrode array in mice and man.
Front Bioeng Biotechnol
January 2025
Department of Neurological Surgery, The Ohio State University, Columbus, OH, United States.
Background: Diabetic peripheral neuropathy (DPN) is a common complication of diabetes. Proactive treatment options remain limited, which is exacerbated by a lack of sensitive and convenient diagnostics, especially early in disease progression or specifically to assess small fiber neuropathy (SFN), the loss of distal small diameter axons that innervate tissues and organs.
Methods: We designed, fabricated, tested, and validated a first-of-its-kind medical diagnostic device for the functional assessment of transdermal small fiber nerve activity.
A novel muscle network approach for objective assessment and profiling of bulbar involvement in ALS.
Front Neurosci
January 2025
Neurology Associate P.C., Lincoln, NE, United States.
Introduction: As a hallmark feature of amyotrophic lateral sclerosis (ALS), bulbar involvement significantly impacts psychosocial, emotional, and physical health. A validated objective marker is however lacking to characterize and phenotype bulbar involvement, positing a major barrier to early detection, progress monitoring, and tailored care. This study aimed to bridge this gap by constructing a multiplex functional mandibular muscle network to provide a novel objective measurement tool of bulbar involvement.
View Article and Find Full Text PDFNeuroimaging features for cognitive fatigue and its recovery with VR intervention: An EEG microstates analysis.
Brain Res Bull
January 2025
Department of Radiology, Functional and Molecular Imaging Key Lab of Shaanxi Province, The Second Affiliated Hospital of Air Force Medical University, No.569 Xinsi Road, Xi'an, 710038, Shaanxi, China. Electronic address:
Introduction: Cognitive fatigue is mainly caused by enduring mental stress or monotonous work, impairing cognitive and physical performance. Natural scene exposure is a promising intervention for relieving cognitive fatigue, but the efficacy of virtual reality (VR) simulated natural scene exposure is unclear. We aimed to investigate the effect of VR natural scene on cognitive fatigue and further explored its underlying neurophysiological alterations with electroencephalogram (EEG) microstates analysis.
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