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:The neuroprotective mechanisms of TPM appear to be related not only to AMPA and kainate receptors inhibition [92,94-97], but also to blockade of Na channels [98], high voltage-activated calcium currents [85], carbonic anhydrase isoenzymes [99], and mitochondrial permeability transition pore (MPTP) [100].
Category: