  A theoretical analysis of the mechanisms underlying the dynamics of
gallbladder and heart pulsation could clarify the question regarding the
classification as chaotic of the associated behaviour, eventually related to a
normal and healthy beat; this analysis is particularly relevant in view of the
control of dynamics bifurcations arising in situations of disease. In this work
is presented a summary of the DFA method applied to gallbladder volume data for
a modest number of healthy and ill patients: the presence of signal correlation
is found in both cases, but the fit shapes differ from some critical values.
