DECISION MAKING AND SKIN RESISTANCE AS A SOMATIC MARKER IN MESIAL TEMPORAL LOBE EPILEPSY

Delil S., Icellioglu S., Kurtish S. Y., Korkmaz B., Yeni S. N.

31st International Epilepsy Congress, İstanbul, Türkiye, 5 - 09 Eylül 2015, cilt.56, ss.21, (Özet Bildiri) identifier

  • Yayın Türü: Bildiri / Özet Bildiri
  • Cilt numarası: 56
  • Basıldığı Şehir: İstanbul
  • Basıldığı Ülke: Türkiye
  • Sayfa Sayıları: ss.21
  • İstanbul Üniversitesi-Cerrahpaşa Adresli: Hayır

Özet

Purpose: Iowa Gambling Test (IGT) showed that patients with frontal lobe lesions performed well on standard neuropsychological tests, however showed lower net scores on IGT. IGT is used to assess decision making(DM). Somatic marker hypothesis(SMH) proposes that emotional processes can be guided by a variety of somatic signals such as skin conductance,especially in decision making behavior. The purpose of this study is to test the SMH and to assess DM performances of patients with mesial temporal sclerosis (MTS) by using IGT with a control group. Method: 22 patients (MSS = 32.7  10.998 for age) and 24 healthy paticipants with similar sociodemographic characteristic (MSS = 31  9.8 for age) were included. The computerized version of IGT had been used to assess DM as published elsewhere. Skin resistance was measured as an indicator of somatic marker during IGT. Skin resistance values are recorded just before -2 ms. the participant makes his choice and this measure is evaluated as an anticipatory response. These anticipatory responses then compared (AB and CD) to see if the groups generated somatic markers before making disadvantegous decks. The effect of deck on anticipatory responses had been analysed by using Univariate ANOVA statistics. Independent samples T-test had been used to compare IGT total net scores between control and epilepsy group. Results: In control group, analysis of variance showed a main effect of deck (AB/CD) on anticipatory responses for AB decks (F(1,184) = 4.33; p < 0.05). No main effect had been found in epilepsy group. Results indicated that the scores were significantly higher for control group (M = 11.6, SD = 14.5) than for epileptic group (M = 2.55, SD = 17.96), (t(44) = 2.95; p < 0.05). Conclusion: The control group makes more adventogeous choices than the patient group in IGT. MTS patients showed different SM responses with controls. This result may be comparable with patients having ventromedial frontal lobe lesions.