“…Most of studies on HRV and music have been experimental rather than interventional, reporting significant changes in HRV as a function of musical mood (Etzel et al, 2006 ), genre (Bernardi et al, 2006 ), familiarity (Iwanaga et al, 2005 ), or tempo(Ellis, 2009 ; Fukumoto and Matsuo, 2010 ). Few reports exist of musical interventions that have included HRV as an index of autonomic function (Kemper et al, 2008 ; Okada et al, 2009 ; Ellis and Thayer, 2010 ; Roque et al, 2013a , b ), and very few on musical stimuli and HRV in VS/UWS patients (Riganello et al, 2010a , b ; Yen et al, 2010 ; Lee et al, 2011 ). However, it was suggested that the effect of music on cerebral processes in patients might reflect its capacity to act both on the external and internal neural networks supporting consciousness (Perrin et al, 2015 ).…”