Response requirements modulate tactile spatial congruency effects.

Experimental Brain Research
Alberto GallaceCharles Spence

Abstract

Several recent studies have provided support for the view that tactile stimuli/events are remapped into an abstract spatial frame of reference beyond the initial somatotopic representation present in the primary somatosensory cortex. Here, we demonstrate for the first time that the extent to which this remapping of tactile stimuli takes place is dependent upon the particular demands imposed by the task that participants have to perform. Participants in the present study responded to either the elevation (up vs. down) or to the anatomical location (finger vs. thumb) of vibrotactile targets presented to one hand, while trying to ignore distractors presented simultaneously to the other hand. The magnitude and direction of the target-distractor congruency effect was measured as participants adopted one of two different postures with each hand (palm-up or palm-down). When the participants used footpedal responses (toe vs. heel; Experiment 1), congruency effects were determined by the relative elevation of the stimuli in external coordinates (same vs. different elevation), regardless of whether the relevant response feature was defined externally or anatomically. Even when participants responded verbally (Experiment 2), the influence...Continue Reading

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Citations

Aug 1, 2007·Experimental Brain Research·Nicholas P HolmesCharles Spence
Jun 26, 2010·Experimental Brain Research·Yuka IgarashiShigeru Ichihara
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Jun 30, 2010·The European Journal of Neuroscience·Elena AzañónSalvador Soto-Faraco
Aug 25, 2019·Attention, Perception & Psychophysics·Anne JensenChristian Frings
May 19, 2020·Attention, Perception & Psychophysics·Charles Spence
Jan 4, 2019·Attention, Perception & Psychophysics·Simon MerzChristian Frings
Jun 10, 2020·Attention, Perception & Psychophysics·Simon MerzCharles Spence

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