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. 2021 Jan;128(1):61-71.
doi: 10.1007/s00702-020-02282-z. Epub 2020 Dec 14.

The relationship between alexithymia, sensory phenotype and neurophysiological parameters in patients with chronic upper limb neuropathy

Gianluca Isoardo  1 , Stefano Ciullo  2 , Paolo Titolo  3 , Elena Fontana  2 , Bruno Battiston  3 , Maurizio Stella  4 , Nicola Luxardo  5 , Federica Laino  5 , Giuseppe Migliaretti  6 , Ilaria Stura  6 , Rita B Ardito  7 , Mauro Adenzato  2
Affiliations

The relationship between alexithymia, sensory phenotype and neurophysiological parameters in patients with chronic upper limb neuropathy

Gianluca Isoardo et al. J Neural Transm (Vienna). 2021 Jan.

Abstract

In this study, we investigated the relationship between sensory abnormalities evaluated by quantitative sensory testing (QST) and alexithymia, depression and anxiety in patients with neuropathic pain involving the upper limbs. We enrolled 62 patients (34 with carpal tunnel syndrome, 7 with brachial plexopathy, 3 with cervical painful radiculopathy, 5 with ulnar entrapment neuropathy at elbow and 13 with post-burn hypertrophic scars) and 48 healthy controls. All underwent nerve conduction studies (NCS), evaluation of cold, heat pain and vibration detection threshold (VDT) by QST and evaluation of alexithymia by Toronto Alexithymia Scale (TAS-20), depression by Beck Depression Inventory II (BDI-II), anxiety by State-Trait Anxiety Inventory (STAI-Y), level of psychological distress by 12-item General Health Questionnaire (GHQ-12) and perceived social support by the Multidimensional Scale of Perceived Social Support (MSPSS). The general linear model analysis revealed a significant relationship between TAS-20 overall and TAS-20 sub-score for difficulty identifying feelings and VDT z-scores in the left index with no interaction by year of education and sensory NCS results. Our results demonstrated the association between impairment of vibratory sensation of the left hand, reflecting cutaneous mechanoceptor dysfunction, and alexithymia, particularly the difficulty to identify feelings. The importance of delivering to patients with neuropathic pain personalized care that takes into account not only the neurophysiological aspects but also the aspects of mental functioning is discussed.

Keywords: Alexithymia; Carpal tunnel syndrome; Neuropathic pain; Quantitative sensory testing.

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Conflict of interest statement

All authors have no conflicts of interest and no competing interests.

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