Review: cytological characteristics of commissural and tuberculo-ventral neurons in the rat dorsal cochlear nucleus

Hearing Research
Lorenzo Alibardi

Abstract

The goal of the present review is to summarize the main ultrastructural and immunocytochemical characteristics for glycine and GABA in commissural (COM) and tuberculo-ventral neurons (TV) of the DCN. These neurons are localized in similar areas of the DCN multipolar but are connected to different targets. About 2/3rd of COM-neurons are large to bipolar neurons, mainly glycinergic, often GABA-ergic, with scarce ergastoplasm and axo-somatic boutons. About 1/3rd of COM-neurons are glycine and GABA-negative, and show little ergastoplasm and synaptic coverage. Occasional giant COM-neurons are glycine-positive and GABA-negative, and are covered with synaptic boutons. Other infrequent large neurons, rich in dense core vesicles, glycine- and GABA-negative, are most covered with boutons. TV-neurons are most glycinergic but 9% are glycine-negative. They have little ergastoplasm and a developed Golgi apparatus. Axo-somatic terminals are scarce and mainly contain flat and pleomorphic vesicles, glycine and sometimes GABA (inhibitory). TV-neurons receive a lower number of boutons than COM, which contain mainly flat-pleomorphic terminals. Putative COM-inhibitory boutons contact excitatory pyramidal and giant neurons (monosynaptic inhibition)....Continue Reading

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Citations

Apr 3, 2009·Experimental Brain Research·Michaela FredrichRobert-Benjamin Illing
Jun 25, 2010·Journal of the Association for Research in Otolaryngology : JARO·Jianxun ZhouSusan Shore
May 11, 2012·Journal of Neurophysiology·Sidney P KuoLaurence O Trussell
Feb 21, 2008·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Nadia PilatiMartine Hamann
Feb 8, 2008·The Journal of Histochemistry and Cytochemistry : Official Journal of the Histochemistry Society·Zoltán RusznákGéza Szucs
Oct 13, 2010·Brain Research Reviews·Enrico MugnainiMarco Martina
Nov 28, 2009·Brain Research·Jinsheng Zhang, Xueguo Zhang
Jan 22, 2013·Brain Research·Guo-Run FanHong-Lian Zhang

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