Emotional Substrates in Neuroticism: The Reactions to Arousal-evoking Stimuli of Various Strengths

Authors

  • Nasir Yusoff Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
  • Faruque Reza Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
  • Nik NurAzhani Anuar Department of Neurosciences, School of Medical Sciences, Universiti Sains Malaysia, Health Campus, 16150 Kubang Kerian, Kelantan, Malaysia
  • Roslee Ahmad Faculty of Leadership and Management, UniversitiSains Islam Malaysia, 71800 Nilai, Negeri Sembilan, Malaysia

DOI:

https://doi.org/10.3329/bjms.v19i2.45005

Keywords:

arousal; evoked potentials; emotion; neuroticism; P300 component

Abstract

Objective: Neuroticism is a medical condition associated with negative affect and is considered to predispose one to mental disorders. This study examined the effectsof arousal-evoking stimuli of various strengths on the severity of neuroticism.

Materials and Methods: In the Event Related Potential (ERP)/electroencephalograph (EEG) recording session that was held at the Clinical Neuroscience Laboratory at a local hospital, Electroencephalogram was recorded in 58 participants (N=29 for moderate neuroticism and 29 for mild neuroticism) after they were screened for the severity of the neurotic trait. Universal emotional pictures were chosen randomly from the International Affective Picture System (IAPS) and were used as visual stimuli in the experiment. Visual stimuli weredivided into three categories (high, moderate, low) based on the IAPS normative mean values of arousal.

Results: The significant interaction effect of P300 latency between neuroticism and arousal strength was found in the mid-frontal region. Meanwhile, independent of neuroticism, the main effects of arousal strength of the P300 (amplitude and latency) and N200 (latency) were observed in the mid-central region.

Conclusion: There is a significant interaction between the severity of neuroticism and the emotional arousal strength, thus, points to the implication of the emotion process in the brain rewards system especially among individuals with neuroticism.

Bangladesh Journal of Medical Science Vol.19(2) 2020 p.262-267

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Published

2020-01-16

How to Cite

Yusoff, N., Reza, F., Anuar, N. N., & Ahmad, R. (2020). Emotional Substrates in Neuroticism: The Reactions to Arousal-evoking Stimuli of Various Strengths. Bangladesh Journal of Medical Science, 19(2), 262–267. https://doi.org/10.3329/bjms.v19i2.45005

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Section

Original Articles