{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,6]],"date-time":"2026-10-06T17:31:16Z","timestamp":1791307876017,"version":"4.3.1"},"reference-count":21,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2002,1,16]],"date-time":"2002-01-16T00:00:00Z","timestamp":1011139200000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Molecular Reproduction Devel"],"published-print":{"date-parts":[[2002,3]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>Caudal epididymal spermatozoa of golden hamsters were incubated in capacitation medium. Their movement patterns changed as they became hyperactivated and underwent the acrosome reaction. To understand the basic mechanism by which changes in movement pattern are brought about, digital image analysis was carried out on the flagellar movements recorded with a video system. The degree of flagellar bending increased with incubation time, especially in the proximal midpiece. The hyperactivated spermatozoa had remarkably asymmetrical flagellar waves of large amplitude because either the bends in the same direction as the hook of the head (referred as the \u201cpro\u2010hook bend\u201d) or the bends in the opposite direction to the hook of the head (referred as the \u201canti\u2010hook bend\u201d) extremely increased their curvature; whereas, the acrosome\u2010reacted spermatozoa had relatively symmetrical flagellar waves of large amplitude because both the pro\u2010 and anti\u2010hook bends remarkably increased their curvature. Beat frequency significantly decreased while wavelength of flagellar waves increased after hyperactivation and further after the acrosome reaction. These results suggest that both extreme pro\u2010 and anti\u2010hook bends are essential in the acrosome\u2010reacted spermatozoa even though beat frequency decreased markedly.Mol. Reprod. Dev. 61: 376\u2013384, 2002. \u00a9 2002 Wiley\u2010Liss, Inc.<\/jats:p>","DOI":"10.1002\/mrd.10017","type":"journal-article","created":{"date-parts":[[2002,8,25]],"date-time":"2002-08-25T18:16:03Z","timestamp":1030299363000},"page":"376-384","source":"Crossref","is-referenced-by-count":59,"title":["Quantitative analysis of flagellar movement in hyperactivated and acrosome\u2010reacted golden hamster spermatozoa"],"prefix":"10.1002","volume":"61","author":[{"given":"Sumio","family":"Ishijima","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shoji A.","family":"Baba","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Hideo","family":"Mohri","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Susan S.","family":"Suarez","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2002,1,16]]},"reference":[{"key":"e_1_2_1_2_1","doi-asserted-by":"publisher","DOI":"10.1002\/cm.970050605"},{"key":"e_1_2_1_3_1","first-page":"237","article-title":"The accessory fibers of the sperm tail. 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