title: Regulation of the preparatory period for complex voluntary movement in old and extreme old age.
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D001921:Brain / Q000502:physiology; D002648:Child; D004576:Electromyography; D006801:Humans; D008875:Middle Aged; D009043:Motor Activity / Q000502:physiology*; D009068:Movement; D009119:Muscle Contraction; D009132:Muscles / Q000294:innervation; D011187:Posture; D011930:Reaction Time / Q000502:physiology