Biology 202
Neurobiology and Behavior
Spring 2001

Yes, signals can start in the middle of the box, at all scales

Isolated Nervous System

Isolated Neuron

Isolated leech nervous system: activity in motor nerve (Brodfuehrer and Grobstein, see Variability in Brain Function and Behavior Isolated Aplysia neuron (Alving, B.O., J. Gen. Physiol. 51: 29-45, 1968; figure from Kandel, E.R., Cellular Basis of Behavior, W.H. Freeman, 1976, p 255)

Nothing mysterious, need only additional channels/gradients

Non-linearity (threshhold) phenomena can make system "noisy"

With THAT settled ...

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