Functional neurological symptoms modulate processing of emotionally salient stimuli

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Journal of Psychosomatic Research. 2016, 91, pp. 61-67. ISSN 0022-3999. eISSN 1879-1360. Available under: doi: 10.1016/j.jpsychores.2016.10.007
Zusammenfassung

Objective

Dysfunctional emotion processing has been discussed as a contributing factor to functional neurological symptoms (FNS) in the context of conversion disorder, and refers to blunted recognition and the expression of one's own feelings. However, the emotion processing components characteristic for FNS and/or relevant for conversion remain to be specified. With this goal, the present study targeted the initial, automatic discrimination of emotionally salient stimuli.

Methods

The magnetoencephalogram (MEG) was monitored in 21 patients with functional weakness and/or sensory disturbance subtypes of FNS and 21 healthy comparison participants (HC) while they passively watched 600 emotionally arousing, pleasant, unpleasant or neutral stimuli in a rapid serial visual presentation (RSVP) design. Neuromagnetic activity was analyzed 110–330 ms following picture onset in source space for prior defined posterior and central regions of interest

Results

As early as 110 ms and across presentation interval, posterior neural activity modulation by picture category was similar in both groups, despite smaller initial (110–150 ms) overall and posterior power in patients with FNS. The initial activity modulation by picture category was also evident in the left sensorimotor area in patients with FNS, but not significant in HC.

Conclusions

Similar activity modulation by emotional picture category in patients with FNS and HC suggests that the fast, automatic detection of emotional salience is unchanged in patients with FNS, but involves an emotion-processing network spanning posterior and sensorimotor areas.

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150 Psychologie
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ISO 690FIESS, Johanna, Brigitte ROCKSTROH, Roger SCHMIDT, Christian WIENBRUCH, Astrid STEFFEN, 2016. Functional neurological symptoms modulate processing of emotionally salient stimuli. In: Journal of Psychosomatic Research. 2016, 91, pp. 61-67. ISSN 0022-3999. eISSN 1879-1360. Available under: doi: 10.1016/j.jpsychores.2016.10.007
BibTex
@article{Fiess2016-12Funct-36462,
  year={2016},
  doi={10.1016/j.jpsychores.2016.10.007},
  title={Functional neurological symptoms modulate processing of emotionally salient stimuli},
  volume={91},
  issn={0022-3999},
  journal={Journal of Psychosomatic Research},
  pages={61--67},
  author={Fiess, Johanna and Rockstroh, Brigitte and Schmidt, Roger and Wienbruch, Christian and Steffen, Astrid}
}
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