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The present study evaluated synchronization in the discharge patterns of cochlear nerve units collected from two groups of young chicks (<jats:italic>Gallus\u2003domesticus<\/jats:italic>), one shortly after removal from an exposure to a 120\u2010dB, 900\u2010Hz pure tone for 48\u2003h and the other from a group of non\u2010exposed control animals. Spontaneous activity, the characteristic frequency (CF), CF threshold and a phase\u2010locked peri\u2010stimulus time histogram were obtained for every unit in each group. Vector strength and temporal dispersion were calculated from these peri\u2010stimulus time histograms, and plotted against the unit's CF. All parameters of unit responses were then compared between control and exposed units. The results in exposed units revealed that CF thresholds were elevated by 30\u201335\u2003dB whereas spontaneous activity declined by 24%. In both control and exposed units a high degree of synchronization was observed in the low frequencies. The level of synchronization above approximately 0.5\u2003kHz then systematically declined. The vector strengths in units recorded shortly after removal from the exposure were identical to those seen in control chicks. The deterioration in discharge activity of exposed units, seen in CF threshold and spontaneous activity, contrasted with the total absence of any overstimulation effect on synchronization. This suggested that synchronization arises from mechanisms unscathed by the acoustic trauma induced by the exposure.<\/jats:p>","DOI":"10.1111\/j.1460-9568.2006.05068.x","type":"journal-article","created":{"date-parts":[[2006,10,18]],"date-time":"2006-10-18T09:27:56Z","timestamp":1161163676000},"page":"2003-2010","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["The effects of intense sound exposure on phase locking in the chick (<i>Gallus\u2003domesticus<\/i>) cochlear nerve"],"prefix":"10.1111","volume":"24","author":[{"given":"Adam C.","family":"Furman","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Michael","family":"Avissar","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"James C.","family":"Saunders","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,10,16]]},"reference":[{"key":"e_1_2_7_2_1","first-page":"14","article-title":"Ultrastructural analysis of the Tegmentum Vasculosum after intense sound","volume":"29","author":"Askew C.","year":"2006","journal-title":"Abstr. 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