Reshaping the brain after stroke: The effect of prismatic adaptation in patients with right brain damage

Crottaz-Herbette, Sonia; Fornari, Eleonora; Notter, Michael; Bindschaedler, Claire; Manzoni, Laura; Clarke, Stéphanie

doi:10.1016/j.neuropsychologia.2017.08.005

Cited by 32 publications

(44 citation statements)

References 72 publications

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“…Finally, both left and right PA decreased RSFC between the seed in the PPC and the STG bilaterally. The STG, where damage causes neglect (Karnath et al, 2001(Karnath et al, , 2004, is involved in visual attention, and has been affected by PA in previous studies (Luaute et al, 2006;Crottaz-Herbette et al, 2017).…”

Section: Neuroimaging Resultsmentioning

confidence: 91%

“…There is also evidence that PA affects behavior by acting on the dorsal frontoparietal network (Striemer and Danckert, 2010;Saj et al, 2013;Magnani et al, 2014;Schintu et al, 2016), which controls visually guided motor behavior and visual attention (Corbetta and Shulman, 2002;Milner and Goodale, 2006). However, while some studies have found only frontoparietal network involvement (Saj et al, 2013), others (Luaute et al, 2006;Crottaz-Herbette et al, 2017) describe changes extending to the ventral attentional network in the temporal lobe. Whether PA affects both the dorsal and ventral networks is still unknown.…”

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confidence: 99%

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Prism adaptation modulates connectivity of the intraparietal sulcus with multiple brain networks

Schintu

Freedberg

Gotts

et al. 2019

Preprint

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ABSTRACTPrism adaptation (PA) alters spatial cognition according to the direction of visual displacement by temporarily modifying sensorimotor mapping. Right-shifting prisms (right PA) improve neglect of left space in patients, possibly by decreasing activity in the left hemisphere and increasing it in the right. Left PA shifts attention to the right in healthy individuals by an opposite mechanism. However, functional imaging studies of PA are inconsistent, perhaps because of differing activation tasks. We measured resting-state functional connectivity (RSFC) in healthy individuals before and after PA. Right, vs. left, PA decreased RSFC in the navigation network defined by the right posterior parietal cortices (PPCs), hippocampus, and cerebellum. Right PA, relative to baseline, increased RSFC between regions within both PPCs and between the PPCs and the right middle frontal gyrus, whereas left PA decreased RSFC between these regions. These results show that right PA modulates connectivity within the right-hemisphere navigation network and shifts attention leftward by increasing connectivity in the right frontoparietal network and left PA produces essentially opposite effects, consistent with the interhemispheric competition model. These finding explain the action of PA on intact cognition and will help optimize interventions in neglect patients.

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Section: Neuroimaging Resultsmentioning

confidence: 91%

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confidence: 99%

Prism adaptation modulates connectivity of the intraparietal sulcus with multiple brain networks

Schintu

Freedberg

Gotts

et al. 2019

Preprint

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“…This same study demonstrated that R-PA did not have the same effect on other types of visuospatial processing, such as visuospatial working memory. In a later study, the shift of the ventral attentional system from the right to the left hemisphere was demonstrated with the same visual detection task in neglect patients [ 29 ]. The model derived from these studies, referred to as SHD-VAS (shift in hemispheric dominance within the ventral attentional system), offers a parsimonious explanation for the effects of R-PA on visuospatial attention in normal subjects and neglect patients (for discussion see [ 37 ]).…”

Section: Discussionmentioning

confidence: 99%

“…The ecological R-PA paradigm involved an adaptation phase during which the subject wore prisms which deviated the entire visual field 10° to the right (as in previous studies [ 17 , 18 , 20 , 29 , 41 , 42 ]). The adaptation phase lasted 30 minutes during which the subject carried out a sequence of six different visuomotor activities, three of which resulted in sound production: (i) playing a sequence of 3 tones on a colour-coded xylophone according to the colours on a card shown by the experimenter; (ii) ringing 3 coloured bells in a sequence chosen from a group of 7 according to the colours on a card shown by the experimenter; (iii) placing five cups according to the pattern shown by the experimenter; (iv) picking up one bell identified by its colour among seven bells and ringing it; (v) placing a token in a column (among five) which the experimenter designated by its number (Puissance4® game); and (vi) placing Scrabble® tokens in the correct order to form three-letter words presented visually by the experimenter.…”

Section: Methodsmentioning

confidence: 99%

“…As demonstrated in a recent study, the representation of the left, center, and right visual fields is enhanced in the left IPL and the representation of the right visual field decreased in the right IPL [ 28 ]. Thus, R-PA appears to shift the right-dominant ventral attentional system to the left hemisphere; in neglect, this shift is likely to restore the alerting input to the dorsal attentional system on either side and contribute thus to the alleviation of attentional deficits in visuospatial neglect [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

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For Better or Worse: The Effect of Prismatic Adaptation on Auditory Neglect

et al. 2017

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Patients with auditory neglect attend less to auditory stimuli on their left and/or make systematic directional errors when indicating sound positions. Rightward prismatic adaptation (R-PA) was repeatedly shown to alleviate symptoms of visuospatial neglect and once to restore partially spatial bias in dichotic listening. It is currently unknown whether R-PA affects only this ear-related symptom or also other aspects of auditory neglect. We have investigated the effect of R-PA on left ear extinction in dichotic listening, space-related inattention assessed by diotic listening, and directional errors in auditory localization in patients with auditory neglect. The most striking effect of R-PA was the alleviation of left ear extinction in dichotic listening, which occurred in half of the patients with initial deficit. In contrast to nonresponders, their lesions spared the right dorsal attentional system and posterior temporal cortex. The beneficial effect of R-PA on an ear-related performance contrasted with detrimental effects on diotic listening and auditory localization. The former can be parsimoniously explained by the SHD-VAS model (shift in hemispheric dominance within the ventral attentional system; Clarke and Crottaz-Herbette 2016), which is based on the R-PA-induced shift of the right-dominant ventral attentional system to the left hemisphere. The negative effects in space-related tasks may be due to the complex nature of auditory space encoding at a cortical level.

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Supramodal effect of rightward prismatic adaptation on spatial representations within the ventral attentional system

et al. 2017

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Rightward prismatic adaptation (R-PA) was shown to alleviate not only visuo-spatial but also auditory symptoms in neglect. The neural mechanisms underlying the effect of R-PA have been previously investigated in visual tasks, demonstrating a shift of hemispheric dominance for visuo-spatial attention from the right to the left hemisphere both in normal subjects and in patients. We have investigated whether the same neural mechanisms underlie the supramodal effect of R-PA on auditory attention. Normal subjects underwent a brief session of R-PA, which was preceded and followed by an fMRI evaluation during which subjects detected targets within the left, central and right space in the auditory or visual modality. R-PA-related changes in activation patterns were found bilaterally in the inferior parietal lobule. In either modality, the representation of the left, central and right space increased in the left IPL, whereas the representation of the right space decreased in the right IPL. Thus, a brief exposure to R-PA modulated the representation of the auditory and visual space within the ventral attentional system. This shift in hemispheric dominance for auditory spatial attention offers a parsimonious explanation for the previously reported effects of R-PA on auditory symptoms in neglect.

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Reshaping the brain after stroke: The effect of prismatic adaptation in patients with right brain damage

Cited by 32 publications

References 72 publications

Prism adaptation modulates connectivity of the intraparietal sulcus with multiple brain networks

Prism adaptation modulates connectivity of the intraparietal sulcus with multiple brain networks

For Better or Worse: The Effect of Prismatic Adaptation on Auditory Neglect

Supramodal effect of rightward prismatic adaptation on spatial representations within the ventral attentional system

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