Prism Adaptation Improves Ego-Centered but Not Allocentric Neglect in Early Rehabilitation Patients

Gossmann, Anja; Kastrup, Andreas; Kerkhoff, Georg; López-Herrero, Carmen; Hildebrandt, Helmut

doi:10.1177/1545968313478489

Cited by 48 publications

(46 citation statements)

References 28 publications

(35 reference statements)

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“…This is in line with a recent study showing that neglect patients with a motor-intentional deficit benefited from a 2-week program of PA, while patients classified as having primarily a visual-attentional deficit did not benefit (Goedert, Chen, Boston, Foundas, & Barrett, 2014). A further finding of interest for the interpretation of PA effects on single-word reading is a study by Gossmann, Kastrup, Kerkhoff, López-Herrero, and Hildebrandt (2013), who found that PA only affected body-centered neglect and cancellation, but not line bisection. This finding suggests that the reference frames that are predominantly implicated in these tasks may have distinct dynamics of plasticity and therefore respond differently to the spatio-motor recalibration triggered by PA.…”

Section: Discussionsupporting

confidence: 86%

What role for prism adaptation in the rehabilitation of pure neglect dyslexia?

Ptak

2017

Neurocase

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Prism adaptation (PA) has been successfully applied in the rehabilitation of spatial neglect, with significant transfer to classic neglect tests and activities of daily living. However, well-controlled studies were unable to replicate these findings, and recent reports suggest that PA may affect selectively visuo-motor symptoms. Here, a patient with pure left neglect dyslexia was tested before, immediately after, and 24 h after PA. Despite a significant adaptation aftereffect adaptation had no effect omissions, substitutions and letter-based errors. PA does not affect pure neglect dyslexia and should therefore be reserved for the rehabilitation of motor-intentional, rather than visual-attentional symptoms.

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Section: Discussionsupporting

confidence: 86%

What role for prism adaptation in the rehabilitation of pure neglect dyslexia?

Ptak

2017

Neurocase

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“…One of these did not report statistical analyses (Keane et al ., ). Of the remaining studies, 11 found an improvement after PA (Farnè et al ., ; Frassinetti et al ., ; Gossmann et al ., ; Humphreys et al ., ; Jacquin‐Courtois et al ., ; Keller et al ., ; McIntosh et al ., ; Nijboer et al ., ; Nys, Seurinck, et al ., ; Serino et al ., ; Vallar et al ., ). Effects were less consistent in four studies.…”

Section: Resultsmentioning

confidence: 99%

“…The terminal feedback procedure was used in 12 studies (Eramudugolla, Boyce, Irvine, & Mattingley, 2010;Fortis et al, 2010;Frassinetti, Angeli, Meneghello, Avanzi, & L adavas, 2002;Mancuso et al, 2012;McIntosh, Rossetti, & Milner, 2002;Priftis et al, 2013;Rusconi & Carelli, 2012;Saevarsson, Kristj ansson, Hildebrandt, & Halsband, 2009;Saevarsson et al, 2010;Serino et al, 2007Serino et al, , 2009Vangkilde & Habekost, 2010). Eleven of these found (some) significant effects of PA. Twelve studies used the concurrent feedback procedure (Farn e, Rossetti, Toniolo, & L adavas, 2002;Gossmann, Kastrup, Kerkhoff, L opez-Herrero, & Hildebrandt, 2013;Jacquin-Courtois, Rode, Pisella, Boisson, & Rossetti, 2008;Keane, Turner, Sherrington, & Beard, 2006;Luaut e et al, 2012;Morris et al, 2004;Nijboer et al, 2011;Nys, Seurinck, & Dijkerman, 2008;Nys, de Haan, et al, 2008;Rossetti et al, 1998;Rousseaux, Bernati, Saj, & Kozlowski, 2006;Sarri et al, 2008), of which nine found (some) significant effects of PA. In several studies the obstruction procedure was not clearly described (Humphreys, Watelet, & Riddoch, 2006;Keller et al, 2009;Saj et al, 2013;Shiraishi et al, 2010;Smit et al, 2013;Vallar, Zilli, Gandola, & Bottini, 2006).…”

Section: Intervention Characteristicsmentioning

confidence: 99%

Does prism adaptation affect visual search in spatial neglect patients: A systematic review

Wit

Brink

Visser‐Meily

et al. 2016

Journal of Neuropsychology

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Prism adaptation (PA) is a widely used intervention for (visuo-)spatial neglect. PA-induced improvements can be assessed by visual search tasks. It remains unclear which outcome measures are the most sensitive for the effects of PA in neglect. In this review, we aimed to evaluate PA effects on visual search measures. A systematic literature search was completed regarding PA intervention studies focusing on patients with neglect using visual search tasks. Information about study content and effectiveness was extracted. Out of 403 identified studies, 30 met the inclusion criteria. The quality of the studies was evaluated: Rankings were moderate-to-high for 7, and low for 23 studies. As feature search was only performed by five studies, low-to-moderate ranking, we were limited in drawing firm conclusions about the PA effect on feature search. All moderate-to-high-ranking studies investigated cancellation by measuring only omissions or hits. These studies found an overall improvement after PA. Measuring perseverations and total task duration provides more specific information about visual search. The two (low ranking) studies that measured this found an improvement after PA on perseverations and duration (while accuracy improved for one study and remained the same for the other). This review suggests there is an overall effect of PA on visual search, although complex visual search tasks and specific visual search measures are lacking. Suggestions for search measures that give insight in subcomponents of visual search are provided for future studies, such as perseverations, search path intersections, search consistency and using a speed-accuracy trade-off.

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“…For example, reductions in neglect symptoms following rightward prism adaptation have been observed for tasks involving line bisection (Rossetti, Rode, Pisella, Farné, Li, Boisson, & Perenin, 1998; Pisella, Rode, Farne, Boisson, & Rossetti, 2002), shape cancellation (Rossetti et al, 1998; Serino, Bonifazi, Pierfederici, & Ladavas, 2007), body orientation judgments (Gossmann, Kastrup, Kerkhoff, LÓpez-Herrero, & Hildebrandt, 2013), visual search (Saevarsson, Kristjansson, Hildebrandt, & Halsband, 2009), haptic exploration (McIntosh, Rossetti, & Milner, 2002), straight-ahead pointing (Pisella et al, 2002), and attentional disengagement from ipsilesional hemispace (Schindler, McIntosh, Cassidy, Birchall, Benson, Ietswaart, & Milner, 2009). In addition, Bultitude, Rafal, and List (2009) demonstrated that adaptation to rightward-shifting prisms ameliorates the local processing bias of neglect patients.…”

Section: Introductionmentioning

confidence: 99%

Adaptation to leftward-shifting prisms enhances local processing in healthy individuals

Reed

Dassonville

2014

Neuropsychologia

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In healthy individuals, adaptation to left-shifting prisms has been shown to simulate the symptoms of hemispatial neglect, including a reduction in global processing that approximates the local bias observed in neglect patients. The current study tested whether leftward prism adaptation can more specifically enhance local processing abilities. In three experiments, the impact of local and global processing was assessed through tasks that measure susceptibility to illusions that are known to be driven by local or global contextual effects. Susceptibility to the rod-and-frame illusion – an illusion disproportionately driven by both local and global effects depending on frame size – was measured before and after adaptation to left- and right-shifting prisms. A significant increase in rod-and-frame susceptibility was found for the left-shifting prism group, suggesting that adaptation caused an increase in local processing effects. The results of a second experiment confirmed that leftward prism adaptation enhances local processing, as assessed with susceptibility to the simultaneous-tilt illusion. A final experiment employed a more specific measure of the global effect typically associated with the rod-andframe illusion, and found that although the global effect was somewhat diminished after leftward prism adaptation, the trend failed to reach significance (p = .078). Rightward prism adaptation had no significant effects on performance in any of the experiments. Combined, these findings indicate that leftward prism adaptation in healthy individuals can simulate the local processing bias of neglect patients primarily through an increased sensitivity to local visual cues, and confirm that prism adaptation not only modulates lateral shifts of attention, but also prompts shifts from one level of processing to another.

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Prism Adaptation Improves Ego-Centered but Not Allocentric Neglect in Early Rehabilitation Patients

Abstract: PA is helpful in treating severely impaired patients in the postacute phase, but the effect is restricted to ego-centered neglect. Lesions in the postcentral cortex (middle occipito-temporal, middle temporal, and posterior parietal areas) seem to limit the effect of PA.

Cited by 48 publications

References 28 publications

What role for prism adaptation in the rehabilitation of pure neglect dyslexia?

What role for prism adaptation in the rehabilitation of pure neglect dyslexia?

Does prism adaptation affect visual search in spatial neglect patients: A systematic review

Adaptation to leftward-shifting prisms enhances local processing in healthy individuals

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