Responding to Unfair Offers Made by a Friend: Neuroelectrical Activity Changes in the Anterior Medial Prefrontal Cortex

Autor(es)

Campanha, Camila ^{[1, 2]} ; Minati, Ludovico ^[3] ; Fregni, Felipe ^{[4, 5, 6]} ; Boggio, Paulo S. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Univ Prebiteriana Mackenzie, Ctr Hlth & Biol Sci, Social & Cognit Neurosci Lab, BR-01241001 Sao Paulo - Brazil

^[2] Univ Prebiteriana Mackenzie, Ctr Hlth & Biol Sci, Dev Disorders Program, BR-01241001 Sao Paulo - Brazil

^[3] Fdn IRCCS Ist Neurol Carlo Besta, Dept Sci, I-20133 Milan - Italy

^[4] Harvard Univ, Sch Med, Spaulding Rehabil Hosp, Dept Phys Med & Rehabil, Lab Neuromodulat, Boston, MA 02114 - USA

^[5] Harvard Univ, Sch Med, Massachusetts Gen Hosp, Boston, MA 02114 - USA

^[6] Harvard Univ, Sch Med, Beth Israel Deaconess Med Ctr, Dept Neurol, Boston, MA 02115 - USA

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF NEUROSCIENCE; v. 31, n. 43, p. 15569-15574, OCT 26 2011.
• Citações Web of Science: 35

Resumo

When receiving unfair monetary offers from another person, the most common response is punishment. Existing literature on the Ultimatum Game indicates that individuals frequently refuse unfair offers even when this results in a loss for themselves. Here, we present behavioral and neurophysiological evidence demonstrating that friendship substantially modifies this response. When the proposer was a friend rather than an unknown person, unfair offers were less frequently rejected and the medial frontal negativity (MFN) typically associated with unfair offers was reversed to positive polarity. The underlying generators were located in inferior-mesial and right inferior-and medial-lateral frontal regions (BA10 and BA11). These findings highlight the fundamental role of the anterior prefrontal cortex in interpersonal economic interaction and, particularly, present new evidence on the effects of social distance on the MFN. (AU)

• Processo FAPESP: 09/04694-1 - Estudo preliminar sobre potenciais cognitivos em tarefa de tomada de decisão social
• Beneficiário: Camila Campanhã
• Modalidade de apoio: Bolsas no Brasil - Mestrado