The human vomeronasal organ. Part II: prenatal development

The human vomeronasal organ. Part VI: A nonchemosensory vestige in the context of major variations of the mammalian vomeronasal organ

A vomeronasal organ (VNO) is found in most extant amphibians, reptiles, and mammals, but is absent in extant archosaurs (birds and crocodilians). In amniotes, the VNO differs greatly from its basal form, a simple neuroepithelial patch, as it still exists in most lissamphibians, and in some taxa (e.g., primates and bats) it presents extreme variations in epithelial structure. The history of the ...

Postnatal development of the rat vomeronasal organ.

The vomeronasal organ (VNO), also know as Jacobson’s organ, is a paired chemosensory organ mediating the perception of chemical stimuli related to social and/or reproductive behavior (for review, see Farbman, 1992). In rodents, it is an elongated tube, with a crescentshaped sensory epithelium (SE) consisting of basal cells, bipolar neurons and supporting cells. Proliferation continues throughou...

The vomeronasal organ.

The vomeronasal organ (VNO) is a chemoreceptor organ enclosed in a cartilaginous capsule and separated from the main olfactory epithelium. The vomeronasal neurons have two distinct types of receptor that differ from each other and from the large family of odorant receptors. The VNO receptors are seven-transmembrane receptors coupled to GTP-binding protein, but appear to activate inositol 1,4,5-...

The Vomeronasal Organ: A Neglected Organ

Observations on the vomeronasal organ of prenatal Tarsius bancanus borneanus with implications for ancestral morphology.

Adult primates have at least five known phenotypes of vomeronasal organ (VNO), ranging from the typical morphology seen in most other mammals to complete absence. With such morphological disparity, the phylogenetic value and any inferences on ancestral VNO morphology of the primate VNO are left uncertain. The present study investigated the VNO of embryonic and fetal Tarsius bancanus borneanus (...