Stimulate trigger interneuron

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(No Transcript)
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Signals from rear brain (posterior ganglion)
Signals from front brain (anterior ganglion)
Stimulate trigger interneuron
Signals to muscles
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Sometimes it swims ...
Leech thinks its swimming
Signal to muscle
Signals along ventral cord
trigger
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Sometimes not ...
No swimming signal
trigger
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Variance no swim
For triggered swim signals

• variance increases.
• autocorrelation increases.
• greater predictability.
• attractor expands.

swim
Autocorrelation swim
predictability
Attractor size
No swim
swim
swim
No swim
No swim