AU - Amiri, Mohsen AU - Salmanderis, H TI - Comparison of the abdominal muscles thickness in chronic nonspecific low back pain subjects in position of hook lying over unstable surfaces utilizing diagnostic ultrasonography PT - JOURNAL ARTICLE TA - USWR JN - USWR VO - 3 VI - 2 IP - 2 4099 - http://ptj.uswr.ac.ir/article-1-72-en.html 4100 - http://ptj.uswr.ac.ir/article-1-72-en.pdf SO - USWR 2 ABĀ  - Abstract Objective: Comparison of global and local abdominal muscles thickness in chronic non-‎specific low back pain patients with healthy controls in position of hook-lying over variant ‎stability surface utilizing diagnostic ultrasonography Methods and Materials: ‎ ‎20 chronic non-specific low back pain male patients compared with a convenient sample of ‎age and gender matched healthy controls in a semi-experimental study.‎ Thickness of abdominal muscles was measured in end of inspiration and expiration phases ‎by B-mode linear ultrasound transducer in three different hook-lying positions over: 1- ‎stable surface, 2- foam roller under spine and finally 3- foam roller under spine and one ‎foot. Data were analyzed utilizing SPSS.‎ Results: ‎ In healthy controls internal oblique and transverse abdomens muscles in expiration phase ‎revealed significant differences between three positions. P< 0.001 ‎ In patients internal oblique and transverse abdomens muscles only revealed significant ‎differences between position one and two. P< 0.005‎ Conclusion: ‎ In low back pain subjects internal oblique and transverse abdomens muscles were unable to ‎activate in more difficult position over unstable surface due to chronic pain process such as ‎functional deficiency and decrease number of muscle spindle and muscle fiber atrophy. ‎ CP - IRAN IN - Dept. of PT LG - eng PB - USWR PG - 9 PT - Research YR - 2013