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:…control conditions (e.g., Hinton et al., 2004; Kudo et al., 2004; Pouthas et al., 2005), those that have highlight the role of the pre-SMA, IFG, and putamen in processing specifically temporal information (Coull et al., 2004, 2008; Harrington et al., 2010; Morillon et al., 2009; Rao et al., 2001).
Category: