title: Scalp recorded slow potential shifts during isometric ramp and hold contractions in human subjects.
abstract: During voluntary isometric slow ramp contractions of the hand up to an internally defined target force level sustained negative potential shifts in the EEG were recorded from 6 human subjects. The potential shifts are composed of (a) a bilateral wide spread negativity with a maximum amplitude at the vertex, and (b) a smaller negative wave contralateral to the responding hand with a maximum over the respective motor area. Both components disappear during a voluntary isometric isotonic contraction when subjects have to maintain a stable force level for some seconds.
mesh_terms: D000200:Action Potentials; D000328:Adult; D001921:Brain / Q000502:physiology*; D004569:Electroencephalography; D007839:Functional Laterality; D006801:Humans; D007537:Isometric Contraction; D008297:Male; D009119:Muscle Contraction; D005082:Physical Exertion