Changing of nerve tension after releasing pectoral muscle in positive ULNT 1 participants

Abstract

The aim of this study was to investigate the change of median nerve tension after release pectoral muscles tension in male and female subjects. The subjects included 17 volunteers (6 males, 11 females), aged range were 20-33 years who had positive of ULNT 1(median bias).  We found that there were significantly different (P < 0.05) on the degree of elbow extension in ULNT1 position between before and after the release pectoral muscles (3 parts; pectoralis major: sternal part, pectoralis major: clavicular part, pectoralis minor) by using Muscle Energy Techniques (MET ). The mean and standard deviation of angles of elbow extension before release of pectoral muscles tension in male and female were 147.32 ±10.81°, 143.66 ± 8.07°, respectively. The angles of elbow extension after release of the pectoral muscles tension by MET were 153.77±11.73°, 153.87±12.06° respectively. We suggested that the release of pectoral muscles tension may contribute to release of median nerve in ULNT1.

Keywords: Pectoralis major muscle tension, Pectoralis minor muscle tension, Neurodynamic test, Upper limb neurodynamic test, Muscle energy technique