Efferents and centrifugal afferents of the main and accessory olfactory bulbs in the snake Thamnophis sirtalis

Brain, Behavior and Evolution
E Lanuza, M Halpern

Abstract

This study reinvestigates the efferent projections of the main and accessory olfactory bulbs and describes for the first time the centrifugal projections to the main and accessory olfactory bulbs in the snake Thamnophis sirtalis, using the intraaxonal transport of the anterograde and retrograde tracer biotinylated dextran amine and the retrograde tracer horseradish peroxidase. The olfactory projection consists of three tracts: the lateral olfactory tract, which projects bilaterally to the lateral cortex and the rostral amygdala, crossing the midline through the stria medullaris-habenular commissure system; the intermediate olfactory tract, which projects ipsilaterally to the olfactory tubercle and contributes to the contralateral projection; and the medial olfactory tract, which projects ipsilaterally to the dorsomedial retrobulbar formation. The vomeronasal projection is formed by a single tract, the accessory olfactory tract, that projects ipsilaterally to the nucleus of the accessory olfactory tract, the medial amygdala and the nucleus sphericus. The centrifugal projections to the main and accessory olfactory bulb are composed of two components: one that arises in areas that receive the olfactory or vomeronasal input (neuron...Continue Reading

Citations

Aug 10, 1999·The Journal of Comparative Neurology·A Martínez-MarcosM Halpern
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May 11, 1999·Alcoholism, Clinical and Experimental Research·O A Parsons
Jan 25, 2006·Brain, Behavior and Evolution·Frédéric LabergeGerhard Roth
Oct 14, 2003·The Journal of Comparative Neurology·Nerea Moreno, Agustín González
Mar 10, 2001·The Journal of Comparative Neurology·A Martínez-MarcosM Halpern
Aug 5, 2008·Journal of Chemical Neuroanatomy·Jesús M LópezAgustín González
Mar 12, 2008·Brain Research Bulletin·I Ubeda-BañonA Martinez-Marcos
Mar 12, 2008·Brain Research Bulletin·Enrique LanuzaFernando Martínez-García
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