Document Detail

Ontogeny of the nasopalatine duct in primates.
MedLine Citation:
PMID:  12923897     Owner:  NLM     Status:  MEDLINE    
Ecological explanations have been put forward to account for the precocious or delayed development of patency in ducts leading to the vomeronasal organ (VNO) in certain mammals. Perinatal function may be related, in part, to the patency or fusion of the vomeronasal and nasopalatine (NPD) ducts. However, few studies have focused on NPD development in primates, which generally have a prolonged period of dependence during infancy. In this study we examined 24 prenatal primates and 13 neonatal primates, and a comparative sample of fetal mice and insectivores. In embryonic and early fetal Microcebus murinus, the NPD was completely fused, whereas in fetuses of later stages the duct was partially fused or completely patent. M. myoxinus of all stages demonstrated some degree of NPD fusion. In all other prenatal primates, the NPD was fused to some extent. Four prenatal insectivores (Tenrec ecaudatus) showed some degree of NPD fusion. In Mus musculus at 19 days gestation, the NPD was patent, although the anatomically separate VNO duct was fused. T. ecaudatus and most of the neonatal primates revealed complete NPD patency. An exception was Saguinus geoffroyi, which exhibited fusion of the NPD near the VNO opening. These observations may relate to differences in perinatal VNO function. The differences noted in our study suggest that M. murinus and M. myoxinus may differ in perinatal VNO functionality and perhaps in related behavior. Observations of neonatal primates suggest that NPD patency may be relatively common at birth and could serve other purposes in addition to being an access route for VNO stimuli.
Kristin L Shimp; Kunwar P Bhatnagar; Christopher J Bonar; Timothy D Smith
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Publication Detail:
Type:  Comparative Study; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  The anatomical record. Part A, Discoveries in molecular, cellular, and evolutionary biology     Volume:  274     ISSN:  1552-4884     ISO Abbreviation:  -     Publication Date:  2003 Sep 
Date Detail:
Created Date:  2003-08-18     Completed Date:  2004-05-21     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  101234285     Medline TA:  Anat Rec A Discov Mol Cell Evol Biol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  862-9     Citation Subset:  IM    
Copyright Information:
Copyright 2003 Wiley-Liss, Inc.
School of Physical Therapy, Slippery Rock University, Slippery Rock, Pennsylvania, USA.
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MeSH Terms
Cheirogaleidae / embryology
Embryo, Mammalian / anatomy & histology
Embryonic Structures / growth & development*
Embryonic and Fetal Development
Insectivora / embryology
Mice / embryology
Nasal Cavity / embryology*
Palate, Hard / embryology*
Primates / embryology*
Vomeronasal Organ / embryology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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