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:By inactivating the contralateral wulst during recordings of ipsilateral stimulus responses, Bredenkötter and Bischof [34] found indications of a mutual inhibition between the two hemispheres resulting in a suppression of the ipsilateral input that increased during development [35].
Category: