The file name consist of identity part and description, i.e. <identity>_<description>.mat. Identity information includes mouse number, recording date and recording session ID. An example of an identity is '11553-1406060602+03'.

The description part determines what data is stored in the file. Possible values are:
*) EEG. Contains EEG data.
*) EGF. Contains high frequency EEG data.
*) POS. Contains tracking coordinates (variable posx) and timestamps (variable post).
*) T<num>C<num>. This is a spike file that contains cell spike timestamps. The <num> represents tetrode and cell number correspondingly.