2014-08-252014-08-252014-03-31SFAIR, Márcio José Teixeira. Efeitos do exercício voluntario na recuperação de hemissecção da medula espinhal: mudanças na rede perineuronal e acetilação de histonas. 2014. 66 f. Dissertação (Mestrado) – Universidade Federal do Pará, Instituto de Ciências Biológicas, Belém, 2014. Programa de Pós-Graduação em Neurociências e Biologia Celular.https://repositorio.ufpa.br/handle/2011/5495Regular physical exercise prevents and combats various diseases over time, especially as a great therapeutic tool for the treatment of lesions in the central nervous system (CNS). After transection (complete or incomplete / hemisection) spinal cord reactive glial cells secrete substances inhibitory to axonal regeneration , for example , molecules of chondroitin sulfate proteoglycans (PGSCs) that play an important role in the formation of a physical barrier chemical , called glial scar, which prevents the growth of axons damaged by injury. Research involving experimental model of spinal cord injury and rehabilitation by exercise have obtained promising results. However, the physiological and molecular mechanisms by which promote these positive results are still poorly understood. The objective of this study was to analyze the recovery of motor function of the hind paw after voluntary exercise protocol in an experimental model of spinal cord hemisection and investigate two molecular mechanisms involved in functional recovery: the degradation of the PGSCs Perineuronal networks and histone acetylation. To do this, twenty-four (24) male Wistar rats (Rattus norvegicus) mice were used and divided into 3 groups (control, trained and untrained). Except for the control group, all animals were accustomed to racing wheels and followed underwent an experimental surgery hemisection of the spinal cord at the time of the 8th thoracic vertebra. Our results showed that voluntary exercise on wheels racing after experimental spinal cord injury promoted recovery of motor function of the affected hind paw, but did not observe qualitative differences in histone acetylation and degradation PGSCs between groups.porAcesso AbertoMedula espinhalHistonasExercício voluntárioLesão medularHemissecçãoDissertaçãoCNPQ::CIENCIAS BIOLOGICAS::FISIOLOGIA