TY - JOUR
T1 - Experimental observation of multi-stability and dynamic attractors in silicon central pattern generators
AU - Zhao, Le
AU - Nogaret, Alain
PY - 2015/11/16
Y1 - 2015/11/16
N2 - We report on the multistability of chaotic networks of silicon neurons and demonstrate how spatiotemporal sequences of voltage oscillations are selected with timed current stimuli. A 3 neuron central pattern generator was built by interconnecting Hodgkin-Huxley neurons with mutually inhibitory links mimicking gap junctions. By systematically varying the timing of current stimuli applied to individual neurons, we generate the phase lag maps of neuronal oscillators and study their dependence on the network connectivity. We identify up to 6 attractors consisting of triphasic sequences of unevenly spaced pulses propagating clockwise and anti-clockwise. While confirming theoretical predictions, our experiments reveal more complex oscillatory patterns shaped by the ratio of the pulse width to the oscillation period. Our work contributes to validating the command neuron hypothesis.
AB - We report on the multistability of chaotic networks of silicon neurons and demonstrate how spatiotemporal sequences of voltage oscillations are selected with timed current stimuli. A 3 neuron central pattern generator was built by interconnecting Hodgkin-Huxley neurons with mutually inhibitory links mimicking gap junctions. By systematically varying the timing of current stimuli applied to individual neurons, we generate the phase lag maps of neuronal oscillators and study their dependence on the network connectivity. We identify up to 6 attractors consisting of triphasic sequences of unevenly spaced pulses propagating clockwise and anti-clockwise. While confirming theoretical predictions, our experiments reveal more complex oscillatory patterns shaped by the ratio of the pulse width to the oscillation period. Our work contributes to validating the command neuron hypothesis.
UR - http://dx.doi.org/10.1103/PhysRevE.92.052910
U2 - dx.doi.org/10.1103/PhysRevE.92.052910
DO - dx.doi.org/10.1103/PhysRevE.92.052910
M3 - Article
VL - 92
JO - Physical Review E (PRE)
JF - Physical Review E (PRE)
IS - 5
M1 - 052910
ER -