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J Manipulative Physiol Ther. 2018 May;41(4):350-357. doi: 10.1016/j.jmpt.2017.10.009. Epub 2018 Apr 7.

Correlation Between Skin Temperature Over Myofascial Trigger Points in the Upper Trapezius Muscle and Range of Motion, Electromyographic Activity, and Pain in Chronic Neck Pain Patients.

Author information

1
Postgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil.
2
Postgraduate Program in Rehabilitation and Functional Performance, Department of Biomechanics, Medicine, and Rehabilitation of the Locomotor Apparatus, Medical School of Ribeirão Preto, University of São Paulo, Ribeirão Preto, SP, Brazil. Electronic address: rguirro@fmrp.usp.br.

Abstract

OBJECTIVE:

The purpose of this study was to assess the correlation between skin temperature over a myofascial trigger point in the upper trapezius muscle and range of motion of the cervical spine, electromyographic activity, and pain in patients with chronic neck pain.

METHODS:

This is a single-blind cross-sectional study. Forty participants of both sexes, aged 18 to 45 years, with chronic neck pain and myofascial trigger points in the upper trapezius muscle were included in the study. The participants were assessed using the Numeric Rating Scale, the Neck Disability Index, infrared thermography, algometry, fleximetry, and electromyographic activity.

RESULTS:

A positive association was observed between skin temperature to the right with the range of motion of cervical flexion (r = 0.322, P = .043), the median frequency of isometrics to the right (r = 0.341, P = .032), and the median frequency of rest to the left (rs = 0.427, P = .006); as were a negative association between skin temperature to the right and the root mean square of rest to the right (rs = -0.447, P = .004), and a positive association of skin temperature to the left with the median frequency of isometrics to the right (r = 0.365, P = .020), and the median frequency of rest to the left (rs = 0.573, P < .001).

CONCLUSION:

Patients with chronic neck pain who had reduction of skin temperature over myofascial trigger points in the upper trapezius muscle had reduced cervical range of motion for flexion, reduced median frequency at rest and during isometric contraction, and increased root mean square at rest.

KEYWORDS:

Muscle, Skeletal; Myofascial Pain Syndromes; Physical Therapy Modalities; Thermography

PMID:
29631764
DOI:
10.1016/j.jmpt.2017.10.009

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