SOD1 and atrial fibrillation: CPEE (100 mg/kg), and amongst various fractions tested, AF (36 mg/kg), were most effective in ameliorating 3-NP induced behavioural alterations (improved body weight, locomotor, rotarod performance, balance beam walk performance and memory retention), and oxidative damage (attenuated lipid peroxidation, nitrite levels, restored catalase, SOD and GSH levels).