But some research showed that, compared with other parts of the hand, the processing of tactile targets delivered in the center of the palm is facilitated as early as 1000 ms after attention orienting [20]. This suggests that the center of the palm is sensitive enough to allow the perception of sensations that are otherwise difficult to detect. So, if poor heartbeat perceivers report more intense SPSs in the center of the palm, it is probably because this may be the part of the hand where it is easiest to perceive them. In fact, the raw spatial distribution of the frequency (Fig. 1) and intensity (Fig. 2) of SPSs in poor heartbeat perceivers clearly shows a kind of center of mass, i.e., a place where a large share of the sensations are reported, namely in the middle of the palm. By contrast, good heartbeat perceivers report SPSs in a larger area in the palm.