Howells, Fleur M Perceived mental effort correlates with changes in tonic arousal during attentional tasks. [electronic resource] - Behavioral and brain functions : BBF Jul 2010 - 39 p. digital Publication Type: Journal Article; Research Support, Non-U.S. Gov't ISSN: 1744-9081 Standard No.: 10.1186/1744-9081-6-39 doi Subjects--Topical Terms: AdultArousal--physiologyAttention--physiologyBeta RhythmBrain--physiologyElectroencephalographyEvent-Related Potentials, P300FemaleFrontal Lobe--physiologyGalvanic Skin Response--physiologyHeart Rate--physiologyHumansHydrocortisone--metabolismMaleMental Processes--physiologyNeural Pathways--physiologyNeuropsychological TestsParietal Lobe--physiologyPeriodicitySaliva--metabolismTheta Rhythm