Evaluate the collective function of references cited together in a given text segment.
Classify their combined role into one of the following categories: 'method', 'background', or 'result'.

Text:…cortex, cerebellum, and basal ganglia including the caudate and putamen (Bengtsson et al., 2009; Coull et al., 2004, 2008; Grahn and McAuley, 2009; Harrington et al., 1998, 2010; Lewis and Miall, 2003; McAuley et al., 2012; Morillon et al., 2009; Nenadic et al., 2003; Rao et al., 2001; Schwartze…
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