Emotion processing in Parkinson's disease: An EEG spectral power study

R. Yuvaraj, M. Murugappan, Mohd Iqbal Omar, Norlinah Mohamed Ibrahim, Kenneth Sundaraj, Khairiyah Mohamad, M. Satiyan

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

Objective: Although an emotional deficit is a common finding in Parkinson's disease (PD), its neurobiological mechanism on emotion recognition is still unknown. This study examined the emotion processing deficits in PD patients using electroencephalogram (EEG) signals in response to multimodal stimuli. Method: EEG signals were investigated on both positive and negative emotions in 14 PD patients and 14 aged-matched normal controls (NCs). The relative power (i.e., ratio of EEG signal power in each frequency band compared to the total EEG power) was computed over three brain regions: the anterior (AF3, F7, F3, F4, F8 and AF4), central (FC5 and FC6) and posterior (T7, P7, O1, O2, P8 and T8) regions for theta (4-8 Hz), alpha (8-13 Hz), beta (13-30 Hz) and gamma (30-60 Hz) frequency sub-bands, respectively. Results: Behaviorally, PD patients showed decreased performance in classifying emotional stimuli as measured by subjective ratings. EEG power at theta, alpha, beta, and gamma bands in all regions were significantly different between the NC and PD groups during both the emotional tasks, with p-values less than 0.05. Furthermore, an increase of relative spectral powers in the theta and gamma bands and a decrease of relative powers in the alpha and beta bands were observed for PD patients compared with NCs during emotional information processing. Conclusion: The results suggest the possibility of the existence of a distinctive neurobiological substrate of PD patients during emotional information processing. Also, these distributed spectral powers in different frequency bands might provide meaningful information about emotional processing in PD patients.

Original languageEnglish
Pages (from-to)491-502
Number of pages12
JournalInternational Journal of Neuroscience
Volume124
Issue number7
DOIs
Publication statusPublished - 2014

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Parkinson Disease
Electroencephalography
Emotions
Automatic Data Processing
Power (Psychology)
Brain

Keywords

  • Electroencephalogram
  • Emotion
  • Parkinson's disease
  • Relative spectral power

ASJC Scopus subject areas

  • Neuroscience(all)
  • Medicine(all)

Cite this

Emotion processing in Parkinson's disease : An EEG spectral power study. / Yuvaraj, R.; Murugappan, M.; Omar, Mohd Iqbal; Mohamed Ibrahim, Norlinah; Sundaraj, Kenneth; Mohamad, Khairiyah; Satiyan, M.

In: International Journal of Neuroscience, Vol. 124, No. 7, 2014, p. 491-502.

Research output: Contribution to journalArticle

Yuvaraj, R, Murugappan, M, Omar, MI, Mohamed Ibrahim, N, Sundaraj, K, Mohamad, K & Satiyan, M 2014, 'Emotion processing in Parkinson's disease: An EEG spectral power study', International Journal of Neuroscience, vol. 124, no. 7, pp. 491-502. https://doi.org/10.3109/00207454.2013.860527
Yuvaraj, R. ; Murugappan, M. ; Omar, Mohd Iqbal ; Mohamed Ibrahim, Norlinah ; Sundaraj, Kenneth ; Mohamad, Khairiyah ; Satiyan, M. / Emotion processing in Parkinson's disease : An EEG spectral power study. In: International Journal of Neuroscience. 2014 ; Vol. 124, No. 7. pp. 491-502.
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