Figure 4.

Cutting PdN6 in the animal disrupted swimming. A, The animal was anesthetized and the body wall above the buccal mass was cut open. PdN6 was transected near the right pedal ganglion with scissors. Nerve-transected animals were paired with sham-operated animals. B, Fifty percent of nerve-transected animals often failed to swim after the surgery (black triangles). In contrast, all sham-operated animals swim (white circles). C, Cutting PdN6 reduced the number of body flexions during the swim behavior. Graph showing the average number of body flexions during the escape swim behavior for animals with PdN6 transected (black triangles) and sham-operated controls (white circles). Data for B and C were obtained from six animals. Error bars indicate SEM. Asterisks indicate significant difference (see Results).