... distinguishable from the type I SGN fibers by their trajectories in the organ of Corti. However, to specifically distinguish these fibers, we undertook ChAT immunolabeling of the cholinergic efferent fibers( Fig. 6C,F,I,L,O,R )( Merchan Perez et al., 1994 ; Sobkowicz and Emmerling,1989 ). This established...