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In the present study, the effect of self-awakening on sleep inertia after a 20-min. nap was examined. Nine participants ( M = 74.1 yr., SD = 5.0 yr.) took part in the three experimental conditions: the self-awakened nap, the forced-awakened nap, and the control (no-nap) conditon. Analysis showed sleepiness and performance after the nap significantly improved compared with the control condition. P3 amplitude tended to be larger after self-awakening than after forced-awakening. The present study indicates a 20-min. nap reduces afternoon sleepiness, and the application of self-awakening may contribute to higher arousal after a nap taken by this elderly group.<\/jats:p>","DOI":"10.2466\/pms.102.2.339-351","type":"journal-article","created":{"date-parts":[[2007,6,19]],"date-time":"2007-06-19T19:49:55Z","timestamp":1182282595000},"page":"339-351","source":"Crossref","is-referenced-by-count":10,"title":["Self-Awakening, Sleep Inertia, and P3 Amplitude in Elderly People"],"prefix":"10.1177","volume":"102","author":[{"given":"Kosuke","family":"Kaida","sequence":"first","affiliation":[{"name":"The Japan Society for Promotion of Science, The Japanese National Institute of Industrial Health"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Keiko","family":"Ogawa","sequence":"additional","affiliation":[{"name":"The Japan Society for Promotion of Science, Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Hiroshi","family":"Nittono","sequence":"additional","affiliation":[{"name":"Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mitsuo","family":"Hayashi","sequence":"additional","affiliation":[{"name":"Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Masaya","family":"Takahashi","sequence":"additional","affiliation":[{"name":"The Japanese National Institute of Industrial Health"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Tadao","family":"Hori","sequence":"additional","affiliation":[{"name":"Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"179","published-online":{"date-parts":[[2006,4,1]]},"reference":[{"key":"bibr1-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1093\/sleep\/15.2.173"},{"key":"bibr2-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1016\/S0749-0690(18)30920-0"},{"key":"bibr3-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1097\/00004691-199503000-00006"},{"key":"bibr4-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2869.2003.00358.x"},{"key":"bibr5-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1177\/003151258005000226"},{"key":"bibr6-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1037\/h0087342"},{"key":"bibr7-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1016\/S0168-5597(97)00036-1"},{"key":"bibr8-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1016\/S0013-4694(97)00119-3"},{"key":"bibr9-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1016\/S1388-2457(98)00003-0"},{"key":"bibr10-pms.102.2.339-351","first-page":"209","volume":"1","author":"Hono T.","year":"1991","journal-title":"Kawasaki Medical Welfare Journal]"},{"key":"bibr11-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.1046\/j.1440-1819.2001.00810.x"},{"key":"bibr12-pms.102.2.339-351","doi-asserted-by":"publisher","DOI":"10.3102\/10769986001001069"},{"key":"bibr13-pms.102.2.339-351","first-page":"371","volume":"10","author":"Jasper H. 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