Prevalence of Myofascial Trigger Points and Diagnostic Criteria of Different Muscles in Function of the Medial Longitudinal Arch

• Published in: Archives of physical medicine and rehabilitation Vol. 96; no. 6; pp. 1123 - 1130
• Main Authors: Zuil-Escobar, Juan C., Martínez-Cepa, Carmen B., Martín-Urrialde, Jose A., Gómez-Conesa, Antonia
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.06.2015
• Subjects: Dancing - physiology; Dancing - statistics & numerical data; Female; Humans; Joint Instability - epidemiology; Lower extremity; Physical Medicine and Rehabilitation; Prevalence; Rehabilitation; Scoliosis - epidemiology; Trigger points; MTrP; Prevalence; MLA; LTrP; ICC; Lower extremity; LTR; TA; Trigger points; ATrP; FDL; PB; PPT; VM; Rehabilitation; PL; TP; NDT; vastus medialis; latent trigger point; tibialis anterior; navicular drop test; medial longitudinal arch; flexor digitorum longus; intraclass correlation coefficient; pressure pain threshold; peroneus brevis; local twitch response; myofascial trigger point; active trigger point; tibialis posterior; peroneus longus
• ISSN: 0003-9993; 1532-821X
• DOI: 10.1016/j.apmr.2015.02.017

To evaluate the reliability of the used diagnostic criteria of latent trigger points (LTrPs) and pressure pain thresholds and to evaluate the prevalence of LTrPs in several muscles of the lower limb in subjects with a lower medial longitudinal arch (MLA) compared with controls. Cross-sectional study. University campus. Subjects with a lower limb MLA (n=82) and controls (n=82) (N=164). Not applicable. The navicular drop test was used to classify subjects with a lower MLA (≥10mm) and controls (5–9mm). The Simons et al recommended specific diagnostic criteria and pressure pain thresholds were used to evaluate the prevalence of LTrPs in several muscles of the lower limb, which was compared between the 2 groups. The reliability was evaluated using Cohen's kappa and intraclass correlation coefficient. The unpaired Student t test and chi-square test were used to evaluate the difference in the LTrP prevalence between the 2 groups. The intrarater reliability of the navicular drop test and the diagnosis of LTrPs was excellent, with the taut band and tender spot being the most reliable diagnostic criteria. In the lower MLA group, 60 subjects (73%) presented at least 1 LTrP whereas 57 controls (70%) presented at least 1 LTrP. The lower MLA group showed more LTrPs (4.46±4.10) than did controls (3.32±3.24) (P<.05). There were significantly (P<.05) more subjects with LTrPs in the flexor digitorum longus, tibialis anterior, and vastus medialis in the lower MLA group than in the control group. LTrPs are common in the lower limb muscles in both controls and subjects with a lower MLA. A lower MLA is associated with a higher prevalence of LTrPs, which are significant in the flexor digitorum longus, tibialis anterior, and vastus medialis.