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Figures
- Fig. 1.
A tympanal membrane of the moth Heliothis virescens. (A) Outside view. (B) Inside view. The membrane has a window cut in A, exposing the point of neural attachment of A1 and A2, indicated by the arrow in B. The purple outline indicates the perimeter of the thin tympanal membrane. (C) Internal view of the auditory nerve connecting to the IIIN1b nerve and then into the ganglion. The black object is an insect pin holding down the dorsolateral muscles just under the auditory nerve/IIIN1b junction. (D) Same as C but outlined to identify internal structures: yellow dotted line is nerve/ganglion, blue dashed line is muscle, green double line is tracheal pieces.
- Fig. 2.
A1 and A2 threshold neural response. (A) Neurophysiological threshold response of the A1 and A2 cells according to wing position. (B) The maximum number of A1 action potentials fired just before A2 began firing, with wings in the up, flat, down and unconstrained position. Yellow regions represent significance of at least P=0.05, n=18.
- Fig. 3.
Displacement of the tympanal membrane due to sound. (A) Average displacement for all three wing positions. Color indicates significant differences according to Tukey–Kramer. For significance of each wing position, see Fig. S1. (B) Displacement of individual wing positions at each frequency for 80 dB SPL. Data were not significantly different. n=21.
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