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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Hear Res. 2011 Feb 12;279(1-2):118–130. doi: 10.1016/j.heares.2011.01.019

Figure 4.

Figure 4

Representative electron micrographs of endbulbs (EB, tinted yellow) taken from a normal hearing cat, a congenitally deaf cat, and a congenitally deaf cat stimulated electrically through a cochlear implant. The cats are matched in age. This series of micrographs illustrate that stimulation of the auditory nerve via a cochlear implant restores the structure of the synapse, specifically with respect to the size and curvature of the postsynaptic density (*) and the return of synaptic vesicle density adjacent to the synapse. (From Ryugo et al., 2005).