Prism adaptation in alternately exposed hands

Abstract

We assessed intermanual transfer of the proprioceptive realignment aftereffects of prism adaptation in right-handers by examining alternate target pointing with the two hands for 40 successive trials, 20 with each hand. Adaptation for the right hand was not different as a function of exposure sequence order or postexposure test order, in contrast with adaptation for the left hand. Adaptation was greater for the left hand when the right hand started the alternate pointing than when the sequence of target-pointing movements started with the left hand. Also, the largest left-hand adaptation appeared when that hand was tested first after exposure. Terminal error during exposure varied in cycles for the two hands, converging on zero when the right hand led, but no difference appeared between the two hands when the left hand led. These results suggest that transfer of proprioceptive realignment occurs from the right to the left hand during both exposure and postexposure testing. Such transfer reflects the process of maintaining spatial alignment between the two hands. Normally, the left hand appears to be calibrated with the right-hand spatial map, and when the two hands are misaligned, the lefthand spatial map is realigned with the right-hand spatial map.

Effect of visual and haptic feedback on grasping movements

“…This speculation led us to the second aim of this study, which focuses on the role of visual and haptic feedback in the calibration of directed actions. In this regard, studies of the use of incongruent or mismatched feedback about the object position and/or dimension have shown that the system can rapidly adapt to these new visuomotor mappings that are maintained even once feedback is removed (Coats et al 2008;Gentilucci et al 1995;Redding and Wallace 2006;Rossetti et al 1993). These results suggest that visuomotor actions in reaching and grasping tasks may be grounded on simple mechanisms of associative learning based on error signals from visual and haptic feedback Bingham and Pagano 1998;Cuijpers et al 2008;Domini and Caudek 2013;Foster et al 2011;Mon-Williams and Bingham 2007).…”

Sort-term adaptations on bilateral body weight-bearing symmetry and postural control through the application of rotary prisms in healthy children

“…These alterations include aspects as the realignment of head-neck-trunk and limbs, contributing to a reorganization of posture. 3,21,22 It may be argued that these adaptations are caused in part by the mechanistic provocation to re-align proximal and distal segments to accommodate the altered visual field, manifesting acutely during the immediate phase. Particularly, head positioning has been previously reported as a key factor in the static control of posture, and secondarily, as a short-term neural adaptation during the spatial realignment stage, where postural changes persist following the removal of the RPs.…”

Virtual Reality as a Context for Adaptation

“…Adaptation of voluntary movements refers to the integration of proprioceptive and visual information of movement outcomes to reduce sensory prediction error by updating an internal model. It is typically studied by examining changes in movement patterns in response to visuoproprioceptive discordance, such as in the prismatic adaptation paradigm (Redding et al, 2005;Luauté et al, 2009;Redding and Wallace, 2013). Individuals can learn to toggle between learned adaptations and multiple environments by rapidly retrieving the appropriate internal model or strategy based on specific sensory cues (Mistry and Contreras-Vidal, 2004;Hegele and Heuer, 2010;Huberdeau et al, 2015;Schween et al, 2018).…”