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• W1994407844 abstract "A unilateral injury to the forelimb area of the sensorimotor cortex results in an increase in dendritic arborization in the contralateral homotopic cortex which is followed by a pruning back of these dendritic arbors. The increase in arborization is due to an increase in the use of the unimpaired forelimb for postural-motor support; whereas, the dendritic pruning is related, in time, to the return to more symmetrical limb use, but is not prevented by the maintenance of asymmetrical limb use. Dendritic pruning can be prevented by administering an NMDA receptor antagonist (such as MK801 or ethanol) during the pruning phase. This manipulation also coincides with the chronic reinstatement of behavioral deficits. The purpose of this study was to see whether removing the antagonism of the NMDA receptor results in the eventual return of dendritic pruning and behavioral recovery. Therefore, MK801 was administered to lesioned animals starting at post-lesion day 18. One group received MK801 injections until day 60 (Lesion+MK60) and another lesioned group received MK801 until day 30 after which the injections were changed to saline until day 60 (Lesion+MK30). Lesion+MK60 animals showed a prevention of dendritic pruning as well as a chronic reinstatement of forelimb deficits. Lesion+MK30 animals also showed a prevention of dendritic pruning, however, they showed behavioral recovery. These findings suggest that pruning of dendritic arbors may not be directly related to behavioral recovery." @default.
• W1994407844 created "2016-06-24" @default.
• W1994407844 creator A5010088048 @default.
• W1994407844 date "1998-12-01" @default.
• W1994407844 modified "2023-10-18" @default.
• W1994407844 title "Relationship between dendritic pruning and behavioral recovery following sensorimotor cortex lesions" @default.
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• W1994407844 doi "https://doi.org/10.1016/s0166-4328(98)00030-8" @default.
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