en Experimental research article Experimental research article in the name of God, most gracious, most merciful Physiology and Pharmacology Indexing: Index Copernicus (IC), Scientific Information Database (SID) Physiology and Pharmacology is the official publication of the Iranian Society of Physiology and Pharmacology. The journal publishes full-length original articles in physiology, pharmacology and related subjects. Editorial office: Tehran, P.O. Box 19835-181, I.R. IRAN. Chairperson Editor-in-Chief Fereshteh Motamedi PhD Saeed Semnanian PhD Professor of Physiology Professor of Physiology Shaheed Beheshti University of Medical Sciences Tarbiat Modares University Editorial Committee: A Ahmadiani PhD H Esteki PhD A Khoshbaten PhD F Roshanzamir PhD J Behzadi PhD Y Fathollahi PhD M Mahmoudian PhD M Sabetkasaie PhD G Dehghan PhD T Ghafghazi PhD H Manaheji PhD S Semnanian PhD AR Dehpour PhD M Janahmadi PhD F Motamedi PhD S Zahedi-Asl PhD A Eliasi PhD M Javan PhD MH Pourgholami PhD MR Zarrindast PhD Editorial Committee Secretary Technical and Executive Manager M Sabetkasaie PhD M Javan PhD Assoc. Prof. of Pharmacology Assist. Prof. of Physiology Shaheed Beheshti University of Medical Sciences Tarbiat Modares University Consultants: A Rashidypour PhD M Nayebpour PhD AR Asgari PhD HR Sadeghipour PhD MR Panjehshahin PhD A Haeri PhD M Samini PhD H Parsai PhD MR Mahdavi PhD AR Sarkaki PhD HR Rasekh PhD H Najafipour PhD Web: www.phypha.ir/ppj Email: ppj@phypha.ir Publisher: Neuroscience Research Center, Shaheed Beheshti University of Medical Sciences, Evin, Tehran, Iran. ISSN: 1735-0581 Annual subscription rates: Iran: Hard copy 100,000 Rls., CD-ROM 60,000 Rls., CD-ROM plus Hard copy 140,000 Rls. All other countries: Hard copy US$ 60, CD-ROM US$ 50, CD-ROM plus Hard copy US$ 80. Single copy: Iran 30,000 Rls., All other countries US$ 20. Copyright © 2006 by Neuroscience Research Center, Shaheed Beheshti University of Medical Sciences. 1 1 http://ppj.phypha.ir/browse.php?a_code=A-10-110-51&slc_lang=en&sid=1