61 research outputs found

    From spinal central pattern generators to cortical network: integrated BCI for walking rehabilitation

    Get PDF
    Success in locomotor rehabilitation programs can be improved with the use of brain-computer interfaces (BCIs). Although a wealth of research has demonstrated that locomotion is largely controlled by spinal mechanisms, the brain is of utmost importance in monitoring locomotor patterns and therefore contains information regarding central pattern generation functioning. In addition, there is also a tight coordination between the upper and lower limbs, which can also be useful in controlling locomotion. The current paper critically investigates different approaches that are applicable to this field: the use of electroencephalogram (EEG), upper limb electromyogram (EMG), or a hybrid of the two neurophysiological signals to control assistive exoskeletons used in locomotion based on programmable central pattern generators (PCPGs) or dynamic recurrent neural networks (DRNNs). Plantar surface tactile stimulation devices combined with virtual reality may provide the sensation of walking while in a supine position for use of training brain signals generated during locomotion. These methods may exploit mechanisms of brain plasticity and assist in the neurorehabilitation of gait in a variety of clinical conditions, including stroke, spinal trauma, multiple sclerosis, and cerebral palsy

    Vanishing spin alignment : experimental indication of triaxial 28Si+28Si\bf ^{28}Si + {^{28}Si} nuclear molecule

    Full text link
    Fragment-fragment-Îł\gamma coincidences have been measured for 28Si+28Si\rm ^{28}Si + {^{28}Si} at an energy corresponding to the population of a conjectured resonance in 56^{56}Ni. Fragment angular distributions as well as Îł\gamma-ray angular correlations indicate that the spin orientations of the outgoing fragments are perpendicular to the orbital angular momentum. This differs from the 24Mg+24Mg\rm ^{24}Mg+{^{24}Mg} and the 12C+12C\rm ^{12}C+{^{12}C} resonances, and suggests two oblate 28Si\rm ^{28}Si nuclei interacting in an equator-to-equator molecular configuration.Comment: 14 pages standard REVTeX file, 3 ps Figures -- Accepted for publication in Physical Review C (Rapid Communication

    In vivo studies with hexamethylmelamine.

    No full text

    High-spin structures observed in the 101^{101}Tc fission fragment

    No full text
    High-spin states have been studied in 101^{101}Tc produced as a fission fragment in the reaction 176^{176}Yb + 28^{28}Si at 145 MeV. Gamma rays were detected with the EUROGAM2 array. The level scheme of 101^{101}Tc has been extended up to 4.2 MeV excitation energy and several band structures are observed. Configurations are assigned to two new bands on the basis of their behaviour and of cranked Hartree-Fock-Bogolyubov calculations

    High-spin structures observed in the 101^{101}Tc fission fragment

    No full text
    High-spin states have been studied in 101^{101}Tc produced as a fission fragment in the reaction 176^{176}Yb + 28^{28}Si at 145 MeV. Gamma rays were detected with the EUROGAM2 array. The level scheme of 101^{101}Tc has been extended up to 4.2 MeV excitation energy and several band structures are observed. Configurations are assigned to two new bands on the basis of their behaviour and of cranked Hartree-Fock-Bogolyubov calculations
    • 

    corecore