Mirror-touch synaesthesia: the role of shared ... - UCL Discovery

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Chapter 8
stimulated: rSI, rIFG and right V5 / MT (TBS control site; Figure 8.1). The order of
site of stimulation was randomized between subjects. Each session consisted of two
blocks, one run prior to TBS (baseline performance) and the other following TBS.
During each block, participants completed a four-forced-choice emotion
recognition task, comprised of 140 trials (preceded by 20 practice trials) in which
participants had to indicate the emotional expression of a target face. Each trial began
with the presentation of a fixation cross (1500 ms) followed by the presentation of the
target stimuli. Target stimuli were presented in the centre of the screen for 250 ms.
Following the offset of the target stimuli participants were asked to indicate the
emotion expressed in the target emotion (either happy, sad, neutral or disgust) using a
key press (Figure 8.1d). Each block lasted approximately ten minutes. Stimuli were
displayed on an SVGA 17 inch monitor with a refresh rate of 100Hz. Thirty-five
grey-scale standardised images per emotion were used. Stimuli were selected from the
Karolinska Directed Emotional Faces set (Lundqvist, Flykt, and İhman, 1998).