TY - GEN
T1 - Dynamic control of spinal locomotion circuits
AU - Vogelstein, R. Jacob
AU - Etienne-Cummings, Ralph
AU - Thakor, Nitish V.
AU - Cohen, Avis H.
PY - 2006
Y1 - 2006
N2 - We show that an ongoing locomotor pattern can be modulated by application of discrete electrical stimuli to the spinal cord at specific phases of the locomotor cycle. Data is presented from a series of experiments on in vitro lamprey spinal cords, which were used as an animal model for severe spinal cord injury. For any given stimulus, the effects on frequency, length, and symmetry of locomotor output show a strong dependence on the phase at which stimulation is applied. The most significant changes are seen when stimulation occurs during motor bursting: stimuli applied to the ipsilateral spinal hemicord increase the burst length, while stimuli applied to the contralateral spinal hemicord decrease the burst length. Simulations using experimentally-measured phase-dependent responses indicate that by monitoring the state of the neural system, it should be possible to apply stimuli at the appropriate times to modulate the lamprey "gait" on a cycle-by-cycle basis. Eventually, this approach could lead to development of a neuroprosthetic device for restoring locomotion after paralysis.
AB - We show that an ongoing locomotor pattern can be modulated by application of discrete electrical stimuli to the spinal cord at specific phases of the locomotor cycle. Data is presented from a series of experiments on in vitro lamprey spinal cords, which were used as an animal model for severe spinal cord injury. For any given stimulus, the effects on frequency, length, and symmetry of locomotor output show a strong dependence on the phase at which stimulation is applied. The most significant changes are seen when stimulation occurs during motor bursting: stimuli applied to the ipsilateral spinal hemicord increase the burst length, while stimuli applied to the contralateral spinal hemicord decrease the burst length. Simulations using experimentally-measured phase-dependent responses indicate that by monitoring the state of the neural system, it should be possible to apply stimuli at the appropriate times to modulate the lamprey "gait" on a cycle-by-cycle basis. Eventually, this approach could lead to development of a neuroprosthetic device for restoring locomotion after paralysis.
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M3 - Conference contribution
AN - SCOPUS:33845641059
SN - 0780393902
SN - 9780780393905
T3 - Proceedings - IEEE International Symposium on Circuits and Systems
SP - 4349
EP - 4352
BT - ISCAS 2006
T2 - ISCAS 2006: 2006 IEEE International Symposium on Circuits and Systems
Y2 - 21 May 2006 through 24 May 2006
ER -