scholarly journals Long-lasting aftereffect of brief prism exposure

1974 ◽  
Vol 15 (2) ◽  
pp. 399-400 ◽  
Author(s):  
Stuart T. Klapp ◽  
Sarah A. Nordell ◽  
Kathy C. Hoekenga ◽  
Carol B. Patton
Keyword(s):  
Prism Exposure

scholarly journals Simulated prism exposure in immersed virtual reality produces larger prismatic after-effects than standard prism exposure in healthy subjects

PLoS ONE ◽  
2019 ◽  
Vol 14 (5) ◽  
pp. e0217074 ◽  
Author(s):  
Alexander A. Ramos ◽  
Emil C. Hørning ◽  
Inge L. Wilms
Keyword(s):  
Virtual Reality ◽  
Healthy Subjects ◽  
After Effects ◽  
Prism Exposure

Speculations on a Model of Prism Adaptation

Perception ◽  
1974 ◽  
Vol 3 (4) ◽  
pp. 451-460 ◽  
Author(s):  
R B Welch
Keyword(s):  
Motor Learning ◽  
Corrective Feedback ◽  
Prism Adaptation ◽  
Prism Exposure ◽  
Visual Shift ◽  
Proprioceptive Shift ◽  
Negative Aftereffect ◽  
Corrective Response

Arguments and evidence are presented that prism adaptation results in a third end state in addition to the ‘traditional’ components of ‘proprioceptive shift’ and ‘visual shift’. That is, under certain conditions (most importantly, ones involving error-corrective feedback), exposure to prism-displaced vision induces a motor-learning component, referred to here as an ‘assimilated corrective response’. Thus the postexposure error in target pointing, the ‘negative aftereffect’, is postulated to be the algebraic sum of proprioceptive shift, visual shift, and an assimilated corrective response—at least in certain situations. Support for the existence of this third component as a form of learning is seen in the fact that it occurs primarily when prism exposure involves target-pointing experience, and that it is apparently subject to the effects of some ‘learning variables’.

Integrating visual search, eye movement training and reversing prism exposure in the treatment of Balint-Holmes syndrome: a single case report

2021 ◽  
pp. 1-6
Author(s):  
Francesco Panico ◽  
Angela Arini ◽  
Pierluigi Cantone ◽  
Claudio Crisci ◽  
Luigi Trojano
Keyword(s):  
Case Report ◽  
Visual Search ◽  
Eye Movement ◽  
Single Case ◽  
Prism Exposure ◽  
Movement Training ◽  
Single Case Report

Three timescales in prism adaptation

2015 ◽  
Vol 113 (1) ◽  
pp. 328-338 ◽  
Author(s):  
Masato Inoue ◽  
Motoaki Uchimura ◽  
Ayaka Karibe ◽  
Jacinta O'Shea ◽  
Yves Rossetti ◽  
...  
Keyword(s):  
Visual Feedback ◽  
Learning System ◽  
Prism Adaptation ◽  
State Model ◽  
Prism Exposure ◽  
The Difference ◽  
Three State Model ◽  
Two State Model ◽  
Adaptation Task ◽  
Plos Biol

It has been proposed that motor adaptation depends on at least two learning systems, one that learns fast but with poor retention and another that learns slowly but with better retention (Smith MA, Ghazizadeh A, Shadmehr R. PLoS Biol 4: e179, 2006). This two-state model has been shown to account for a range of behavior in the force field adaptation task. In the present study, we examined whether such a two-state model could also account for behavior arising from adaptation to a prismatic displacement of the visual field. We first confirmed that an “adaptation rebound,” a critical prediction of the two-state model, occurred when visual feedback was deprived after an adaptation-extinction episode. We then examined the speed of decay of the prism aftereffect (without any visual feedback) after repetitions of 30, 150, and 500 trials of prism exposure. The speed of decay decreased with the number of exposure trials, a phenomenon that was best explained by assuming an “ultraslow” system, in addition to the fast and slow systems. Finally, we compared retention of aftereffects 24 h after 150 or 500 trials of exposure: retention was significantly greater after 500 than 150 trials. This difference in retention could not be explained by the two-state model but was well explained by the three-state model as arising from the difference in the amount of adaptation of the “ultraslow process.” These results suggest that there are not only fast and slow systems but also an ultraslow learning system in prism adaptation that is activated by prolonged prism exposure of 150–500 trials.

scholarly journals Visuo-motor rotation influences representational acuity but not space representation

2020 ◽  
Author(s):  
C Michel ◽  
S Amoura ◽  
O White
Keyword(s):  
Spatial Cognition ◽  
Space Representation ◽  
Sensorimotor Adaptation ◽  
Experimental Procedure ◽  
Bisection Task ◽  
After Effects ◽  
Prism Exposure ◽  
Sensorimotor Plasticity ◽  
Line Bisection Task ◽  
Sensorimotor Processes

AbstractPrism adaptation is a well-known experimental procedure to study sensorimotor plasticity. It has been shown that following prism exposure, after-effects are not only restricted to the sensorimotor level but extend as well to spatial cognition. In the present study, we used a visuo-motor rotation task which approaches the perturbations induced by prism exposure. We induced either leftward or rightward 15-degree rotations and we presented the perturbation either abruptly (from one trial to the next) or gradually (over a 34-trial transition). First, we found that none of the conditions produced cognitive after-effects in perceptive line bisection task. This result has a strong methodological impact for prospective investigations focusing on sensorimotor plasticity while sparing space cognition; it is particularly relevant when investigating sensorimotor plasticity in patients with specific representational feature to preserve from aggravation. Second, another interesting result was the increase of the sensitivity with which we discriminate the center of the line, that we propose to call representational acuity. It improved following the perturbation more particularly after gradual exposure and persisted for some time after the sensorimotor adaptation. These innovative results are discussed in terms of sensorimotor processes underpinning the transfer of visuomotor plasticity to spatial cognition.

scholarly journals Alternating prism exposure causes dual adaptation and generalization to a novel displacement

1993 ◽  
Vol 54 (2) ◽  
pp. 195-204 ◽  
Author(s):  
Robert B. Welch ◽  
Bruce Bridgeman ◽  
Sulekha Anand ◽  
Kaitlin E. Browman
Keyword(s):  
Prism Exposure ◽  
Dual Adaptation

A Passive Test of the Held Reafference Hypothesis

1965 ◽  
Vol 20 (3_suppl) ◽  
pp. 1070-1072 ◽  
Author(s):  
Herbert L. Pick ◽  
John C. Hay
Keyword(s):  
Prism Exposure ◽  
Hand Coordination

Prism aftereffects were measured using a passive test of eye-hand coordination. Even with this passive test, self-produced movement during prism exposure was found to increase adaptation, in agreement with Held's hypothesis.

The Propriocpetive Aftereffects of Prism Adaptation Influence Interlimb Rhythmic Coordination

2002 ◽  
Vol 46 (26) ◽  
pp. 2179-2183
Author(s):  
David Black ◽  
Michael A. Riley
Keyword(s):  
Virtual Environment ◽  
Relative Phase ◽  
Steady States ◽  
Prism Adaptation ◽  
Environment Design ◽  
Prism Exposure ◽  
Post Exposure ◽  
Proprioceptive Shift ◽  
Optical Displacement ◽  
Rhythmic Coordination

Adaptation to prisms can produce a change in felt arm position, termed proprioceptive shift. We studied the effects of prism-induced proprioceptive shift on interlimb rhythmic coordination performed under haptic (proprioceptive) guidance, in the absence of vision. Relative to interlimb rhythmic coordination performed before prism exposure, the observed steady states of relative phase for post-exposure coordination were shifted by a small but reliable amount. The shift was in the direction expected given the direction of optical displacement. The amount of variability of interlimb rhythmic coordination was unaffected by prism exposure. The implications of the results apply to virtual environment design.

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