647. Eliciting Tibial or Both Tibial/Peroneal Components is More Efficacious than Eliciting a Peroneal Motor Response With Parasacral Sciatic Nerve Block. (1st September 2008) - Carpenedo, R.; Divizia, F.; Marchione, M. G.; Faccio, G.; Lucci, F.; Frunzo, F.; Celidonio, L.; Papetti, M.; Paciacconi, E.; Faria, S.; Sabato, A. F.; Dauri, M.