title: The effect of deception on motor cortex excitability.
abstract: Although a number of recent neuroimaging studies have examined the relationship between the brain and deception, the neurological correlates of deception are still not well understood. The present study sought to assess differences in cortical excitability during the act of deception by measuring motor evoked potentials (MEPs) during transcranial magnetic stimulation (TMS). Sports fanatics and low-affiliation sports fans were presented with preferred and rival team images and were asked to deceptively or honestly identify their favored team. Hemispheric differences were found including greater excitability of the left motor cortex during the generation of deceptive responses. In contrast to current physiological measures of deception, level of arousal was not found to differentiate truthful and deceptive responses. The results are presented in terms of a complex cognitive pattern contributing to the generation of deceptive responses.
authors.affiliation: Columbia University, New York, NY, USA.
authors.forename: Karen J
authors.initials: KJ
authors.lastname: Kelly
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Murray
authors.forename: Veronica
authors.initials: V
authors.lastname: Barrios
authors.forename: Jamie
authors.initials: J
authors.lastname: Gorman
authors.forename: Giorgio
authors.initials: G
authors.lastname: Ganis
authors.forename: Julian Paul
authors.initials: JP
authors.lastname: Keenan
mesh_terms: D000293:Adolescent; D000704:Analysis of Variance; D019540:Area Under Curve; D001143:Arousal / Q000502:physiology; D003071:Cognition / Q000502:physiology; D008192:Deception; D019054:Evoked Potentials, Motor; D007839:Functional Laterality; D006801:Humans; D008297:Male; D009044:Motor Cortex / Q000502:physiology*; D013177:Sports / Q000523:psychology; D050781:Transcranial Magnetic Stimulation; D055815:Young Adult