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• W3168409864 endingPage "107913" @default.
• W3168409864 startingPage "107913" @default.
• W3168409864 abstract "Reaching toward a target viewed through laterally refracting prisms results in adaptation of both visual and (limb) proprioceptive spatial representations. Common ways to measure adaptation after-effect are to ask a person to point straight ahead with their eyes closed (“manual straight ahead”, MSA), or to a seen target using their unseen hand (“open-loop pointing”, OLP). MSA measures changes in proprioception only, whereas OLP measures the combined visual and proprioceptive shift. The behavioural and neurological mechanisms of prism adaptation have come under scrutiny following reports of reduced hemispatial neglect in patients following this procedure. We present evidence suggesting that shifts in proprioceptive spatial representations induced by prism adaptation are larger following lesions to the intraparietal cortex – a brain region that integrates retinotopic visual signals with signals of eye position in the orbit and that is activated during prism adaptation. Six healthy participants and six patients with unilateral intraparietal cortex lesions underwent prism adaptation. After-effects were measured with OLP and MSA. After-effects of control participants were larger when measured with OLP than with MSA, consistent with previous research and with the additional contribution of visual shift to OLP after-effects. However, patients' OLP shifts were not significantly different to their MSA shifts. We conclude that, for the patients, correction of pointing errors during prism adaptation involved proportionally more changes to arm proprioception than for controls. Since lesions to intraparietal cortex led to enhanced realignment of arm proprioceptive representations, our results indirectly suggest that the intraparietal cortex could be key for visual realignment." @default.
• W3168409864 created "2021-06-22" @default.
• W3168409864 creator A5034762097 @default.
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• W3168409864 date "2021-07-01" @default.
• W3168409864 modified "2023-09-26" @default.
• W3168409864 title "Patients with lesions to the intraparietal cortex show greater proprioceptive realignment after prism adaptation: Evidence from open-loop pointing and manual straight ahead" @default.
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• W3168409864 doi "https://doi.org/10.1016/j.neuropsychologia.2021.107913" @default.
• W3168409864 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34139246" @default.
• W3168409864 hasPublicationYear "2021" @default.
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