Comparative Measurements of Cochlear Apparatus

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Abstract
Micromeasurements of horizontal midmodiolar sections of temporal bones were performed to obtain the dimensions of the different cochlear partitions in the squirrel monkey, the cat, and the rat. The width of the basilar membrane and the tectorial membrane were larger in the apical turn than in the basal turn in all three species. The thickness of the spiral ligament, the width of Reissner’s membrane, and the width of the stria vascularis were larger in the basal turn than in the apical turn. The cross-section areas of scala vestibuli and scala tympani in the three species were larger in the basal turn than in the other turns.

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