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Late onset muscle plasticity in the whisker pad of enucleated rats

Identifieur interne : 001532 ( Pmc/Corpus ); précédent : 001531; suivant : 001533

Late onset muscle plasticity in the whisker pad of enucleated rats

Auteurs : Brenda Toscano-Márquez ; Eduardo Martínez-Martínez ; Elías Manjarrez ; Lourdes Martínez ; Julieta Mendoza-Torreblanca ; Gabriel Gutiérrez-Ospina

Source :

RBID : PMC:2572979

Abstract

Blindness leads to a major reorganization of neural pathways associated with touch. Because incoming somatosensory information influences motor output, it is plausible that motor plasticity occurs in the blind. In this work, we evaluated this issue at the peripheral level in enucleated rats. Whisker muscles in enucleated rats 160 days of age or older showed increased cytochrome oxidase activity, capillary density, motor plate size, and amplitude of evoked field potentials as compared with their control counterparts. Such differences were not observed at ages 10 and 60 days, the capillary density was the exception being greater in the enucleated rat at the latter age. Interestingly, there was a trend to increased neurotrophin-3 concentrations in the whisker pads of enucleated rats throughout postnatal development. Our results show that neonatal enucleation leads to late onset plasticity of the whisker's motor system.


Url:
DOI: 10.1073/pnas.0808431105
PubMed: 18838691
PubMed Central: 2572979

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