Differential effects of galvanic vestibular stimulation on arm position sense in right- vs. left-handers

► Sinistrals and dextrals differ in their cortical vestibular organization. ► Left- and right-handers were examined in arm position sense (APS). ► Right-handers showed greater directional errors towards their body in APS. ► Galvanic vestibular stimulation (GVS) disrupted left APS only in dextrals. ► GVS modulates left APS differently in left- vs. right-handers.