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Midbrain Auditory Pathways Underlying Hearing
Karen K. Glendenning
Published: 2007/03/01
Abstract
The dorsal nucleus of the lateral lemniscus (DLL) is critical for the modulation of ascending auditory information. DLL is the last of two nuclei in the ascending auditory pathway which plays a role in the brain's specialized right and left side auditory processing centers. The organization of the efferent projections of the DLL and their contribution to the ascending auditory system are described. Evidence is provided on the proportion of DLL projections which are distributed to the inferior colliculus (IC) and to the opposite DLL. It was found that there are separate populations of neurons in DLL. Most neurons project to the contralateral side; some project only to the ipsilateral side and few project bilaterally. Those neurons projecting to the contralateral side project both to the IC and to DLL.
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