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Unraveling EEG correlates of unimanual finger movements: insights from non-repetitive flexion and extension tasks.
J Neuroeng Rehabil
December 2024
Laboratory for Neuro- & Psychophysiology, Department of Neurosciences, KU Leuven, Leuven, Belgium.
Background: The loss of finger control in individuals with neuromuscular disorders significantly impacts their quality of life. Electroencephalography (EEG)-based brain-computer interfaces that actuate neuroprostheses directly via decoded motor intentions can help restore lost finger mobility. However, the extent to which finger movements exhibit distinct and decodable EEG correlates remains unresolved.
View Article and Find Full Text PDFSpatial and spectral changes in cortical surface potentials during pinching versusthumb and index finger flexion.
Neurosci Lett
January 2025
Department of Neurologic Surgery, Mayo Clinic, Rochester, MN, USA; Department of Physiology and Biomedical Engineering, Mayo Clinic, Rochester, MN, USA.
Electrocorticographic (ECoG) signals provide high-fidelity representations of sensorimotor cortex activation during contralateral hand movements. Understanding the relationship between independent and coordinated finger movements along with their corresponding ECoG signals is crucial for precise brain mapping and neural prosthetic development. We analyzed subdural ECoG signals from three adult epilepsy patients with subdural electrode arrays implanted for seizure foci identification.
View Article and Find Full Text PDFCardiac cycle modulates alpha and beta suppression during motor imagery.
Cereb Cortex
November 2024
Goldsmiths, University of London, New Cross London SE14 6NW, UK.
Previous interoception research has demonstrated that sensory processing is reduced during cardiac systole, an effect associated with diminished cortical excitability, possibly due to heightened baroreceptor activity. This study aims to determine how phases of the cardiac cycle-systole and diastole-modulate neural sensorimotor activity during motor imagery (MI) and motor execution (ME). We hypothesised that MI performance, indexed by enhanced suppression of contralateral sensorimotor alpha (8-13 Hz) and beta (14-30 Hz) activity, would be modulated by the cardiac phases, with improved performance during diastole due to enhanced sensory processing of movement cues.
View Article and Find Full Text PDFIpsilateral stimulation shows somatotopy of thumb and shoulder auricular points on the left primary somatosensory cortex using high-density fNIRS.
bioRxiv
September 2024
Department of Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh, PA, USA.
Significance: Auriculotherapy is a technique based on stimulation applied to specific ear points. Its mechanism of active and clinical efficacy remain to be established. This study aims to assess the role that primary somatosensory cortex may play to validate auriculotherapy mechanisms.
View Article and Find Full Text PDFArtificial embodiment displaces cortical neuromagnetic somatosensory responses.
Sci Rep
September 2024
NeXT: Neurophsyiology and Neuro-Engineering of Human-Technology Interaction Research Unit, Universita' Campus Bio-Medico di Roma, Rome, Italy.
Article Synopsis
- Scientists studied how our brain changes when we use artificial limbs, like prosthetics that feel like part of our body.
- They used a trick called the Rubber Hand Illusion to see how our brain reacts when we think an artificial limb is really ours.
- They found that different parts of the brain react at different times, showing that our brain has special ways to help us feel like the artificial limb belongs to us.
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