10723082

Source:http://linkedlifedata.com/resource/pubmed/id/10723082

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Predicate	Object
rdf:type	pubmed:Citation
lifeskim:mentions	umls-concept:C0002808, umls-concept:C0009990, umls-concept:C0034693, umls-concept:C0348011, umls-concept:C0441722, umls-concept:C1705822, umls-concept:C1708533, umls-concept:C2698172
pubmed:issue	1
pubmed:dateCreated	2000-6-2
pubmed:abstractText	The baculum is a nonappendicular bone found in the glans tissue of members of five orders of mammals. Its function during copulation is unknown. Anatomical examination of the baculum and corpus cavernosum in the Norway rat (Rattus norvegicus) shows that the two structures are connected by a layer of fibrocartilage, and that the distal tip of the corpus cavernosum swells during erection to surround the proximal end of the baculum. Microradiographs of bacula from sexually experienced males show that regions of the bone may be remodeling; these data suggest that the baculum is load-bearing. On the basis of this anatomy, I propose that the baculum increases the overall flexural stiffness of the penis during copulation by transferring bending and compressive forces from the distal end of the glans to the tensile wall of the corpus cavernosum. Forces on the distal end of the penis during copulation press the baculum against the corpus cavernosum, reducing its internal volume and increasing intracavernosal pressure and corpus cavernosum wall strains. Because the wall of the erect corpus cavernosum is reinforced with inextensible collagen fibers, an increase in wall strain will also increase wall tissue stiffness, and thereby increase the flexural stiffness of the corpus cavernosum.
pubmed:grant	http://linkedlifedata.com/resource/pubmed/grant/5 F32 DK09605-03
pubmed:language	eng
pubmed:journal	http://linkedlifedata.com/resource/pubmed/journal/0406125
pubmed:citationSubset	IM
pubmed:status	MEDLINE
pubmed:month	Apr
pubmed:issn	0362-2525
pubmed:author	pubmed-author:KellyD ADA
pubmed:copyrightInfo	Copyright 2000 Wiley-Liss, Inc.
pubmed:issnType	Print
pubmed:volume	244
pubmed:owner	NLM
pubmed:authorsComplete	Y
pubmed:pagination	69-77
pubmed:dateRevised	2007-11-14
pubmed:meshHeading	pubmed-meshheading:10723082-Animals, pubmed-meshheading:10723082-Copulation, pubmed-meshheading:10723082-Male, pubmed-meshheading:10723082-Penis, pubmed-meshheading:10723082-Rats
pubmed:year	2000
pubmed:articleTitle	Anatomy of the baculum-corpus cavernosum interface in the norway rat (Rattus norvegicus), and implications for force transfer during copulation.
pubmed:affiliation	Department of Biomedical Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY 14853, USA. dak20@cornell.edu
pubmed:publicationType	Journal Article, Research Support, U.S. Gov't, P.H.S.