Convergence and divergence of ascending binaural and monaural pathways from the superior olives of the mustached bat

The Journal of Comparative Neurology
M VaterE Covey

Abstract

The lateral superior olive and medial superior olive give rise to pathways that terminate in the dorsal nucleus of the lateral lemniscus and central nucleus of the inferior colliculus. In most mammals, neurons in both the medial and lateral superior olives are binaural, but in the mustached bat most neurons in the medial superior olive are monaural. The aims of this study were to determine how the inputs to the medial superior olive contribute to its monaurality and to determine whether the ascending projections from the lateral and medial superior olives overlap or remain segregated at their targets. Injections of two different tracers were placed in tonotopically matched areas of the lateral and medial superior olives in the same animal. Retrograde transport from injections in the medial superior olive labeled spherical cells in the contralateral anteroventral cochlear nucleus and principal cells in the ipsilateral medial nucleus of the trapezoid body. Few cells were labeled in ipsilateral cochlear nucleus. Anterograde transport resulted in tonotopically specific distributions of label with the same laterality as in nonecholocating mammals. In the dorsal nucleus of the lateral lemniscus, label from the lateral and medial supe...Continue Reading

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Citations

Mar 30, 1999·Progress in Neurobiology·S H Wu
Apr 1, 1999·Annual Review of Physiology·E Covey, J H Casseday
Apr 1, 1999·Annual Review of Physiology·D Oertel
Nov 27, 2008·The Journal of Comparative Neurology·Jack B KellyMakoto Ito
Nov 9, 2000·Microscopy Research and Technique·A M Thompson, B R Schofield
Apr 6, 2004·The Journal of Comparative Neurology·William C LoftusDouglas L Oliver
May 13, 1999·The Journal of Comparative Neurology·V M BajoJ G Bjaalie
Jul 27, 2007·Journal of Neurophysiology·Kevin A DavisMichael J Pesavento
Mar 28, 2018·The European Journal of Neuroscience·Roberta ArallaChristine Köppl
Oct 24, 2019·Journal of Speech, Language, and Hearing Research : JSLHR·Nematollah RouhbakhshFati Mousave

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