Corpus Callosum Lesions



The localization and function of auditory fibers in the corpus callosum in humans are still unclear. The corpus callosum is anatomically divided into four segments: rostrum, genu, truncus, and splenium (from anterior to posterior) (Fig. 1). After the introduction of magnetic resonance imaging (MRI), extinction of the left ear by the dichotic listening or speech perception test has been reported with reference to lesions in the corpus callosum (1–4).


Corpus Callosum Interaural Time Difference Dichotic Listening Perception Test Superior Olivary Complex 
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© Springer, Tokyo 2009

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