PMID- 17394199 OWN - NLM STAT- MEDLINE DCOM- 20070928 LR - 20151119 IS - 1059-910X (Print) IS - 1059-910X (Linking) VI - 70 IP - 8 DP - 2007 Aug TI - Diversity of the vomeronasal system in mammals: the singularities of the sheep model. PG - 752-62 AB - The enormous morphological diversity and heterogeneity of the vomeronasal system (VNS) in mammals--as well as its complete absence in some cases--complicates the extrapolation of data from one species to another, making any physiological and functional conclusions valid for the whole Mammalian Class difficult and risky to draw. Some highly-evolved macrosmatic mammals, like sheep, have been previously used in interesting behavioral studies concerning the main and accessory olfactory systems. However, in this species, certain crucial morphological peculiarities have not until now been considered. Following histological, histochemical and immunohistochemical procedures, we have studied the vomeronasal organ (VNO) and the accessory olfactory bulb (AOB) of adult sheep. We have determined: (1) that all structures which classically define the VNO in mammals are present and well developed, providing the morphological basis for functional activity. (2) that, conversely, there is only a scant population of scattered mitral/tufted cells. One morphological consequence of both details is that the strata of the AOB in adult sheep are not as sharply defined as in other species; moreover, the small number of the mitral/tufted cells in the AOB may imply that the VNS of adult sheep is not capable of functioning in the way a well-developed VNS does in other species. (3) the zone to zone projection from the apical and basal sensory epithelium of the VNO to the anterior and posterior part of the AOB, respectively, typical in rodents, lagomorphs and marsupials, is not present in adult sheep. CI - Copyright (c) 2007 Wiley-Liss, Inc. FAU - Salazar, Ignacio AU - Salazar I AD - Department of Anatomy and Animal Production, Unit of Anatomy and Embryology, Faculty of Veterinary, University of Santiago de Compostela, 27002 Lugo, Spain. anigsabe@lugo.usc.es FAU - Quinteiro, Pablo Sanchez AU - Quinteiro PS FAU - Aleman, Nuria AU - Aleman N FAU - Cifuentes, Jose Manuel AU - Cifuentes JM FAU - Troconiz, Patricia Fernandez AU - Troconiz PF LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Microsc Res Tech JT - Microscopy research and technique JID - 9203012 RN - 0 (Biomarkers) SB - IM MH - Animals MH - Biomarkers/analysis MH - Immunohistochemistry MH - Microscopy, Confocal MH - Microscopy, Electron, Scanning MH - Models, Animal MH - Olfactory Bulb/anatomy & histology MH - Sheep/*anatomy & histology MH - Species Specificity MH - Vomeronasal Organ/*anatomy & histology/ultrastructure EDAT- 2007/03/31 09:00 MHDA- 2007/09/29 09:00 CRDT- 2007/03/31 09:00 PHST- 2007/03/31 09:00 [pubmed] PHST- 2007/09/29 09:00 [medline] PHST- 2007/03/31 09:00 [entrez] AID - 10.1002/jemt.20461 [doi] PST - ppublish SO - Microsc Res Tech. 2007 Aug;70(8):752-62. doi: 10.1002/jemt.20461.