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Fig. 2. Correlation between field potentials and simultaneously recorded behavior
from prey and predator during an attack. (A) A medial giant neuron mediated
escape tail-flip produced by the crayfish in response to a frontal attack from
the dragonfly nymph. The electrical recording from the bath electrodes is at
the top and shows the potential generated by the predator attack followed by
that of the prey escape. Below that trace, four video frames show the behavior
of the animals (top view and side view via mirror image). The bars
and arrows between them indicate the timing of each frame relative to the bath
potential. The bottom of each frame displays the oscilloscope trace of that
portion of the bath potential. The first two frames illustrate the initial
period of the strike with the opening of the labial palps and the extension of
the labium, respectively. The last two frames illustrate the successful escape
response of the crayfish. For further explanation, see text. (B) Field
potential measurement of the signal generated by the dragonfly nymph while
attacking a mock prey. The initial part of the recording consists of small
deflections that become larger towards the end of the potential.
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