FIG. 4.

A The mean cross-sectional area of Rosenthal’s canal in neonatally deafened cats after combined BDNF + ES, sampled in four cochlear sectors from the base to the apex. Canal area in the BDNF + ES cochleae averaged 97 % of normal and was slightly larger than on the contralateral side (90 % normal), but this difference was not statistically significant. B Rosenthal’s canal area data for the same four cochlear sectors in the ES-only group. Canal area averaged exactly 100 % of normal in the implanted, stimulated cochleae, and was slightly but not significantly larger than that in the contralateral deafened cochleae (93 % of normal).