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Letters

Altered pain threshold sensitivity and frontoparietal–cingulate network in anorexia nervosa: the role of disgust sensitivity

Carmelo Mario Vicario
J Psychiatry Neurosci September 01, 2015 40 (5) E33; DOI: https://doi.org/10.1503/jpn.150169
Carmelo Mario Vicario
Wolfson Centre for Clinical and Cognitive Neuroscience, School of Psychology, Bangor University, Bangor, United Kingdom
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The July issue included an interesting study1 investigating the contribution of the cingulate cortex in altered pain processing in anorexia nervosa. In particular, the study provides the first direct evidence of structural alterations (i.e., decreased grey matter volume and cortical thickness) in correspondence of the frontoparietal–cingulate network of this clinical population, which relates with their higher mean thermal pain threshold as well as with symptom severity and illness duration. According to these results, the authors conclude by arguing the existence of a common neural origin for thermal thresholds alterations and the clinical characteristics of anorexia nervosa.

The neural and behavioural patterns reported by the authors suggest another, not mutually exclusive, interpretation of this result, which fits with the hypothesis of an altered disgust sensitivity in anorexia nervosa.

First, we know that anorexia nervosa is affected by a consistently high disgust sensitivity.2 We also know that the experience of disgust and pain share common neural patterns of activity in the anterior, mid and posterior cingulate cortex and right parietal operculum.3 There is also evidence of a common autonomic nervous system activity in correspondence of the parasympathetic branch for both the experiences of pain4 and disgust.5 Finally, the recent study by Oaten and colleagues6 demonstrates that the experience of disgust is unique in generating a significant, increasing trend in pain sensitivity.

For all these reasons, the absence of measures for assessing the subjective disgust sensitivity threshold in the anorexia nervosa participants represents an important limitation for interpreting the results reported by Bär and colleagues.1

References

  1. ↵
    1. Bär KJ,
    2. de la Cruz F,
    3. Berger S,
    4. et al
    .Structural and functional differences in the cingulate cortex relate to disease severity in anorexia nervosa.J Psychiatry Neurosci 2015;40:269–79.
    OpenUrl
  2. ↵
    1. Aharoni R,
    2. Hertz MM
    .Disgust sensitivity and anorexia nervosa.Eur Eat Disord Rev 2012;20:106–10.
    OpenUrlPubMed
  3. ↵
    1. Benuzzi F,
    2. Lui F,
    3. Duzzi D,
    4. et al
    .Does it look painful or disgusting? Ask your parietal and cingulate cortex.J Neurosci 2008;28:923–31.
    OpenUrlAbstract/FREE Full Text
  4. ↵
    1. Kyle BN,
    2. McNeil DW
    .Autonomic arousal and experimentally induced pain: a critical review of the literature.Pain Res Manag 2014;19:159–67.
    OpenUrl
  5. ↵
    1. Levenson R
    .Autonomic nervous system differences among emotions.Psychol Sci 1992;3:23–7.
    OpenUrlCrossRef
  6. ↵
    1. Oaten MJ,
    2. Stevenson RJ,
    3. Case TI
    .The effect of disgust on pain sensitivity.Physiol Behav 2015;138:107–12.
    OpenUrl
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In this issue

Journal of Psychiatry and Neuroscience: 40 (5)
J Psychiatry Neurosci
Vol. 40, Issue 5
1 Sep 2015
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Altered pain threshold sensitivity and frontoparietal–cingulate network in anorexia nervosa: the role of disgust sensitivity
Carmelo Mario Vicario
J Psychiatry Neurosci Sep 2015, 40 (5) E33; DOI: 10.1503/jpn.150169

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Altered pain threshold sensitivity and frontoparietal–cingulate network in anorexia nervosa: the role of disgust sensitivity
Carmelo Mario Vicario
J Psychiatry Neurosci Sep 2015, 40 (5) E33; DOI: 10.1503/jpn.150169
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