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Updated: Jun 27, 2026
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A Simple Stimulatory Device for Evoking Point-like Tactile Stimuli: A Searchlight for LFP to Spike Transitions
Published on: March 25, 2014
State dependence of spike timing and neuronal function in a motor pattern generating network
Jin-sheng Wu1, Michael R Due, Kosei Sasaki
1Department of Neuroscience, Mount Sinai School of Medicine, New York, New York 10029, USA.
Summary
Neuron B64
Area of Science:
- Neuroscience
- Computational Neuroscience
- Systems Neuroscience
Background:
- Central pattern generators (CPGs) produce rhythmic motor patterns.
- Interneuron B64 in Aplysia feeding CPG fires during phase transitions.
- B64's role in motor program termination was previously unclear.
Purpose of the Study:
- Investigate the role of interneuron B64 in phase transition.
- Determine if B64's function is consistent across different motor programs.
- Explore the impact of firing initiation timing on neuronal function.
Main Methods:
- Electrophysiological recordings in Aplysia.
- Analysis of neural activity during different motor programs (ingestive vs. egestive).
- Perturbation of B64 activity to assess its functional role.
Main Results:
- B64 terminates protraction in all motor programs.
- B64's functional role as a protraction terminator differs between ingestive and egestive programs.
- Differential timing of B64 initiation, influenced by CPG state, dictates its role.
Conclusions:
- Neuronal function is critically dependent on the timing of firing initiation.
- The functional role of neurons can be state-dependent within a network.
- Activity-dependent network states modulate neuronal contributions to motor programs.
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