| Summary: | 碩士 === 高雄醫學大學 === 運動醫學系碩士班 === 104 === Due to technological progress and the popularization of cellphone, computer and other electronic devices, there are more and more people with Mechanical neck disorder (MND) which is the most common and high-cost disease of people with neck diseases. According to a report of Institute for occupational safety and Health (IOSH) in Taiwan, neck pain is on the third place (male 11.9%, female 14.7%) of musculoskeletal symptoms category. The past studies have proved that superficial neck muscle groups of patients with neck pain will experience over-activation and blood flow decrease. However, the mechanism of MND remains unknown. There are many studies using near-infrared spectroscopy (NIRS) to investigate the change of musculoskeletal and brain blood oxygen. In this study, we investigate tissue oxygenation of ster-nocleidomastoid for patients with mechanical neck disorder during isometric neck flexion.
This study recruited 10 diagnostic MND patients (5 males and 5 females, 24.00±5.09yr) and 10 healthy subjects without neck relative problems (6 males and 4 females, 23.61±4.17yr). The change of oxy-hemoglobin and deoxyhemoglobin during performing 25%/50% maxi-mum voluntary isometric contraction of neck flexion (30 sec of each) were measured on sternocleidomastoid muscle belly by NIRS (wave-length: 690 nm and 830 nm). Hyperbolic tangent method (tanh) was applied to analyze the parameters of oxygenation kinetic.
We found that during performing 25%/50% maximum voluntary isometric contraction of neck flexion, there were significantly longer in-flection time (p<0.001) and significantly higher depletion time (p=0.035) in MND patients. The change of total hemoglobin (THb) in MND pa-tients (p=0.019) was also significantly smaller than that in control group (p=0.035) during performing 25%/50% maximum voluntary isometric contraction of neck flexion.
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