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Fig. 1. Anatomy and bursting activity of the Cancer borealis cardiac
ganglion (CG). (A) Schematic of the CG preparation. Large ovals, motor
neurons; small ovals, pacemaker cells; A-l.n., anterolateral nerve; P-l.n.,
posterolateral nerve. The black ring indicates the petroleum jelly well used
to record the activity of the CG. (B) Simultaneous recordings of the CG
bursting pattern from the trunk (top trace) and from a motor neuron axon
(bottom trace).