Insomnia is among the most prevalent health complaints, with approximately 10 to 15% of the general population suffering regularly from it and about 25 to 35% presenting transient or occasional insomnia (Ancoli-Israel & Roth, 1999; Ohayon, 2002; Morin et al., 2006; Doghramji, 2006; LeBlanc et al., 2009). However, many questions remain unanswered with regard to our understanding of insomnia and ...
