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Co-administration of prism adaptation and methylphenidate needs striatal integrity to alleviate spatial neglect

Beaudoin-Gobert, M.; Benistant, F.; De Lanversin, M.; Javouhay, J.; Jacquin-Courtois, S.; Rode, G.; Rossetti, Y.; Luaute, J.

2023-01-17 rehabilitation medicine and physical therapy
10.1101/2023.01.12.23284487 medRxiv
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ContextA previous study demonstrated a long-term functional improvement of spatial neglect after methylphenidate combined with prismatic adaptation in a group of patients suffering from left spatial neglect after a right stroke (RITAPRISM study). Objectivewe hypothesized that the functional improvement after MP combined with PA depends on striatal integrity in responders patients. MethodsWe conducted an MRI study in "MP+PA" program to identify lesional pattern in responders and non-responders patients in the RITAPRISM cohort. Using anatomical segmentation on morphological MRI, we compared lesional pattern in the striatum between responders and non-responders patients. ResultsThe beneficial effect of MP+PA co-administration should require striatal integrity in neglect patients. More specifically, our results suggest that the short-term effect is mediated by the ventral striatum whereas the long-term effect is mediated by the posterior putamen. ConclusionBenefical effet of MP+PA could rely on reinforcement processes at early stage of the MP+PA program and visuospatial substrates at long-term.

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