Figure 11. Denervation of the right side of the syrinx changes lower frequency syllables more than higher frequency syllables.

A) Each dot corresponds to an individual syllable. The intact syllable peak frequency predicted the change in peak frequency following right NXIIts nerve resection; in contrast to denervation of the left side of the syrinx, lower frequency syllables (<2 kHz) were either unchanged or increased peak frequency following loss of right syringeal neuromuscular control. B) Further, right syringeal denervation caused the higher amplitude syllables to increase in sound amplitude.