title: Preferred hand and steadiness of reaction time.
abstract: RT and its left/right difference of both biceps muscles were measured by electromyogram (EMG) in the bilateral simultaneous flexion of elbows using 11 left- and 13 right-handed subjects under four conditions which were combinations of two factors; warning signal; presence or absence of a fore-period, and position of limbs; elbow 90 degrees or 135 degrees. EMG-RT and its left/right difference were influenced by these factors. The effects of warning and position of limbs were not the same on the preferred and non-preferred hands. It was assumed that EMG-RTs of biceps in the preferred hand were less influenced by these experimental conditions.
mesh_terms: D000161:Acoustic Stimulation; D001132:Arm; D004551:Elbow Joint / Q000502:physiology; D004576:Electromyography; D005260:Female; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009068:Movement; D009132:Muscles / Q000502:physiology*; D011187:Posture; D011930:Reaction Time