Adult 1 Brain Mapping 1 Electromyography 1 Evoked Potentials, Motor 1 Humans 1 Magnetic Resonance Imaging 1 Male 1 Motor Cortex 1 Muscle, Skeletal 1 Reproducibility of Results 1 Transcranial Magnetic Stimulation 1 Young Adult 1 abducens nerve 1 adult 1 article 1 brain mapping 1 clinical article 1 controlled study 1 cortical mapping 1 electromyography 1 gravity 1 hand muscle 1 human 1 male 1 motor cortex 1 motor evoked potential 1 muscle cortical representation 1 nuclear magnetic resonance imaging 1 overlap physiology 1