By Roger S. Kirby
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Additional info for An Atlas of Erectile Dysfunction, Second Edition (Encyclopedia of Visual Medicine)
1. Impotence—Atlases I. 6′92 ISBN 0-203-00892-8 Master e-book ISBN ISBN 1-84214-241-0 (Print Edition) First published in 2004 This edition published in the Taylor & Francis e-Library, 2005. uk. No part of this book may be reproduced in any form without permission from the publishers except for the quotation of brief passages for the purposes of review Composition by The Parthenon Publishing Group Page 5 Contents Foreword 7 Preface 9 Section 1 A Review of Erectile Dysfunction 11 Section 2 Erectile Dysfunction lllustrated 47 Index 107 Page 6 This page intentionally left blank.
As yet, however, none have been specifically described, but failure of NO production due to lack of NO synthase or abnormalities of receptor or second-messenger function may well underlie some cases. More research is needed in this rapidly evolving area. NEUROGENIC CAUSES The dependence of normal erectile and ejaculatory function on intact neural pathways to and from the brain has already been mentioned. Not surprisingly a considerable number of neurological disorders may result in erectile dysfunction (Table 3).
Other prostaglandins, such as PGI2, may also play a role in preventing intracorporeal coagulation by their antiplatelet aggregation activity. HEMODYNAMICS OF ERECTION Penile erection is a hemodynamic response to a combination of humoral, neurogenic and local signals. Vasodilatory signaling coincides with reduced vasoconstrictor activity. The result is increased flow through the dilating cavernosal arteries. At the same time, the smooth muscle helicine arteries and lacunar spaces relax, thereby allowing blood to fill the intracorporeal space (Figures 23 and 24).
An Atlas of Erectile Dysfunction, Second Edition (Encyclopedia of Visual Medicine) by Roger S. Kirby