Figure 3. Photomicrographs of phalloidin-labeled whole-mounts of the organ of Corti of a representative Ad.GDNF animal, showing the second turn of the right ear (A and C) and the left ear (B and D). A. In the right ear, the noise exposure resulted in severe loss of outer hair cells, but inner hair cells are intact. B. The same region in the left ear of the same animal has a full complement of hair cells. C. A higher magnification of the right cochlea showing the scars in sites of missing hair cells. D. A higher magnification of the left cochlea showing that the surviving hair cells appear normal, and their stereociliary bundles are intact. Magnifications are x400 for A and B and x900 for C and D.