Fig. 1

Depiction of the pointing task data processing steps. A World-based allocentric calibration is performed with open eyes and a laser pointer. Here, the subject aligns the real-world pointing trajectory (= laser dot) with the real-world target. B Retinotopic egocentric calibration is performed with open eyes. Here, the subject aligns their retinotopic visual representation of the extended hand/finger with the real-world target. C The participant is given instructions to point towards the different targets with their eyes closed (petrol vector). D Symbolic cartesian representation of angular deviation calculation in spherical coordinates. Based on each pointing vector (petrol dot), azimuth (φ) and polar (ϑ) deviations from both world-based (orange) and retinotopic (purple) calibration were calculated and averaged over each pointing paradigm. E The resulting pointing vectors can be holistically assessed when taking the resulting figure frame, i.e., shape configuration, into account, allowing for morphometrical analysis