Two-point discrimination and judgment of laterality in individuals with chronic unilateral non-traumatic shoulder pain

Research output: Contribution to journalArticlepeer-review

Authors

  • Marília Caseiro
  • Amanda Matias Barbosa
  • Felipe José Jandre Dos Reis
  • Marco Barbero
  • Anamaria Siriani de Oliveira

Colleges, School and Institutes

External organisations

  • University of Applied Sciences and Arts of Southern Switzerland
  • Universidade Federal Do Rio de Janeiro
  • University of Sao Paulo

Abstract

BACKGROUND: Cortical representation of the painful body region may be disrupted in several chronic pain conditions. The two-point discrimination test (TPDT) and the Left/Right Judgement Task (LRJT) have been used to identify changes in the cortical body schema in several chronic pain conditions. However, it is unclear if these changes are present for all chronic pain mechanisms.

OBJECTIVES: To investigate the integrity of the body schema of the painful shoulder in patients with chronic unilateral nociceptive shoulder pain.

METHODS: The sample consisted of 52 individuals with chronic unilateral nociceptive shoulder pain. The TPDT was measured over the anterosuperior and lateral regions of both shoulders using a staircase method. Participants also performed judgment tests of shoulder and foot laterality. The comparison of the TPDT and LRJT was performed using the linear regression model with mixed effects.

RESULTS: There was no difference in TPDT in the anterosuperior and lateral regions when comparing the symptomatic and asymptomatic shoulders. There was no difference in the LRJT accuracy and response time between the symptomatic and asymptomatic shoulders. No differences were observed when comparing LRJT variables from symptomatic shoulder and foot.

CONCLUSION: Therefore, results do not provide clear evidence of altered body schema in chronic nociceptive unilateral shoulder pain. This suggest that alterations in body representations may depend on the primary pain mechanism.

Bibliographic note

Copyright © 2021 Elsevier Ltd. All rights reserved.

Details

Original languageEnglish
Article number102447
Number of pages7
JournalMusculoskeletal Science and Practice
Volume56
Early online date12 Aug 2021
Publication statusE-pub ahead of print - 12 Aug 2021

Keywords

  • Body schema, Chronic pain, Judgment of laterality, Shoulder, Tactile perception