[Purpose] The purpose of this study was to identify changes in the thickness of the deep cervical flexors (DCFs) according to the degree of mouth opening (MO) in normal adults. [Subjects] The study’s subjects were 50 normal adults (30 men, 20 women). [Methods] Ultrasound was used to obtain images of muscles, and the NIH ImageJ software was used to measure the thickness of each muscle. [Results] An increase in MO resulted in a corresponding increase in the thickness of the DCFs, and in isometric exercises (IEs), the thickness of the DCFs further increased during MO. [Conclusion] During MO, the thickness of the DCFs increased. This may be due to correlations between mandibular movements and DCFs. Therefore, the results are likely to be utilized as new clinical research data.
The Effects of Intensive Serratus Anterior and Lower Trapezius Muscle Training with Thera-band on Muscle Activation, Height of Shoulder in People with Rounded Shoulder • 25 Purpose This study was to investigated the effect of intensive serratus anterior muscle and lower trapezius muscle training with Thera band on muscle activation and height of shoulder in people with round shoulder. Method Sixteen students with rounded shoulder were recruited in D college and randomly allocated both groups. Both serratus anterior training group(n=8) and lower trapezius group(n=8) were performed intensive muscle training with Thera band for 6 weeks(10 sessions/time, 3times/week, total 18 times). We measured height of shoulder and muscle activation with EMG MR 3.8 software(NORAXON Desktop DTS, USA) for comparing the results of pre post training. Result There were significant difference on scapular height and muscle activation in both serratus anterior group and lower trapezius group(p<0.05). However, in correlation between height of shoulder and muscle activation, we could not find significant difference in both group(p>0.05). Conclusion This study indicated that both of serratus anterior muscle and lower trapezius muscle intensive training using Thera band effect the improvement rounded shoulder in college students.
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