The Tritonia swim CPG

 

The central pattern generator (CPG) is a neuronal circuit that produces

the pattern for rhythmical muscle movement and/or  stereotyped behavior.

 

 

 

Left: Schematic model of the Tritonia swim central pattern generator (CPG).

Right: Location of the CPG neurons in the brain.

Dorsal Swim Interneurons (DSI), C2 neuron, Ventral Swim Interneuron B (VSI-B).

 

The sensory input triggers firing of Tr1, DRI and then DSI, which in turn initiates the swim motor program.

 

 

The swim motor pattern

A brief sensory stimulus produces a series of alternating bursting activities in three neurons.

DSI bursts produces dorsal body flexions whereas VSI bursts ventral body flexions.

 

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