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Fig. 12. Double recordings from a swim motor neuron in the inner nerve ring (top
traces of each pair) and a circular muscle cell approximately 0.5 mm from the
neuron recording site (bottom traces). In A, a spontaneous radial response
occurred between the first and second swim. Note the inhibition of neuronal
action potential burst and the smaller muscle event with a slow rise time. In
the third swim, the preparation had partially recovered from the inhibition,
and it was fully recovered by the fourth swim. (B) Another radial response
from the same preparation produced total inhibition of the neuronal burst in
the second swim (which occurs after a long delay), a single neuronal spike in
the third swim, and full recovery on the fourth. Note the changes in the
muscle action potentials during the inhibition.
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