Article 1 EEG 1 aged 1 alpha rhythm 1 amble gait 1 anti-phase arm swing 1 beta rhythm 1 complementary cortical network 1 electroencephalogram 1 event related potential 1 event related spectral perturbations 1 female 1 gait 1 gamma rhythm 1 human 1 human experiment 1 male 1 motor coordination 1 multi-limb coordination 1 nervous system 1 normal human 1 parietal cortex 1 premotor cortex 1 primary motor cortex 1 right hemisphere 1 somatosensory cortex 1 stereotypy 1 supplementary motor area 1