A marker for the end of adolescence |
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| Authors: | Roenneberg Till Kuehnle Tim Pramstaller Peter P Ricken Jan Havel Miriam Guth Angelika Merrow Martha |
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| Institution: | 1Centre for Chronobiology, Institute of Medical Psychology, Medical Faculty, University of Munich, Goethestr. 31, D-80336 Munich, Germany;2European Academy, Viale Druso 1, I-39100 Bolzano, Italy;3Health Division, Volkswagen AG, PO box 1594/0, D-38436 Wolfsburg, Germany;4Biological Center, University of Groningen, Kerklaan 30, P.O.Box 14, 9750 AA, Haren, Netherlands |
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| Abstract: | Between childhood and adulthood, we go through puberty and adolescence. While the end of puberty is defined as the point of cessation of bone growth (epiphyseal closure; girls: 16 y; boys: 17.5 y), the end of adolescence (19 y) is defined less clearly, by a mixture of physical, psychological, social, and mental measures 1]. One conspicuous property of adolescence is the apparently unsaturable capacity to stay up late and to sleep in. Investigating ‘chronotypes’ we observed an abrupt change in the timing of sleep at around the age of 20 and propose this change as the first biological marker of the end of adolescence. |
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