Figure 2. Schematic models of (A) conventional serosal contact electrode and (B) suction electrode recordings.

All values shown are in millimetres. Electrode position and fibre radius and length were identical for each electrode type. Signals were evaluated at four locations: at 3 mm in each direction from the centre of the electrode (x= 1.5 and 7.5 mm), and at each edge of the electrode (x dependent on electrode contact diameter, with values as shown).