Efeitos da estimulação transcraniana por corrente contínua em tarefas de percepção tátil manual - desempenho tátil entre indivíduos com visão preservada e deficientes visuais

• Ano de defesa: 2011
• Autor(a) principal: Dall´agnol, Patricia Aparecida
• Orientador(a): Boggio, Paulo Sérgio
• Banca de defesa: Carreiro, Luiz Renato Rodrigues , Haddad Junior, Hamilton
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Presbiteriana Mackenzie
• Programa de Pós-Graduação: Distúrbios do Desenvolvimento
• Departamento: Psicologia
• País: BR
• Palavras-chave em Português: ETCC; deficiência visual; córtex somatossensorial; percepção tátil
• Palavras-chave em Inglês: TDCS; visual impairment; somatosensory córtex; tactile perception
• Área do conhecimento CNPq: CNPQ::CIENCIAS DA SAUDE::FISIOTERAPIA E TERAPIA OCUPACIONAL
• Link de acesso: http://dspace.mackenzie.br/handle/10899/22485

The integrity of the sensory system is important to the development of human skills. Notwithstanding, after the loss of one or more systems, the nervous system ability of adapting itself to the new condition is variably due to type and age of loss and other factors involved on the learning of new skills, as in neural plasticity for example. Nevertheless, such adoption is possible once the remaining systems, linked to compensatory mechanisms, supply the retention of sensory loss information. Several studies have pursued neural substrates understanding towards sensorial lost in the face of sensory loss. This paper had as primary goal unravel tDCS influence on somatosensory cortex over the two points and textures discrimination tests submitted to sighted and blind subjects and verify its possible neuromodulatory effects. The results have showed that Anodic tDCS applied to the left somatosensory field produced benefits on two points discrimination performance and texture discrimination. Cathodic tDCS, by its turn, had harmful effects on texture discrimination performance in early blind and sighted subjects. It was found that tDCS has the ability of neuromodulating the excitability of somatosensorial cortex over the tactile discrimination. By taking such findings into consideration, it is possible to conclude that anodic and cathodic tDCS have considerable different effects on early blind and sighted subjects regarding their tactile perception, when applied on primary somatosensory cortex. Inasmuch as anodic tDCS has improved tactile performance, sooner may be possible that, with further researches, such tool may aid sensory loss and disturb treatments or even strengthen Braille reading for blind subjects.