Visual peripersonal space in humans
Elisabetta Làdavas · 2002
Abstract This chapter outlines evidence of the existence of a visual peripersonal space in humans that seems to be codified by an integrated visuotactile system. It describes the evidence of the existence of the peripersonal space centered on the hand and on the face. It also examines the functional properties of this space. It then considers the dynamic aspect of the peripersonal space, i.e., whether this space is fixed or whether it can be expanded or reduced depending on the action performed in space. The data shows the existence of an integrated system controlling both visual and tactile inputs within peripersonal space around the face and the hand and demonstrates how this system is functionally separated from that controlling visual information in the extrapersonal space. Moreover, evidence indicates that the visual experience of the body can somehow ‘boost’ the signal strength to neuronal circuits associated with the feel-touch experience. Furthermore, results illustrate that sight of the body part improves perception of visual stimuli presented in the peripersonal space.