TY - JOUR T1 - Dynamic Evaluation of Lumber Spine Motion in Patients with Segmental Instability TT - ارزیابی دینامیک حرکات ستون فقرات کمری در بیماران مبتلا به بی‌‌ثباتی قطعه‌ای کمری JF - USWR JO - USWR VL - 10 IS - 1 UR - http://rehabilitationj.uswr.ac.ir/article-1-307-en.html Y1 - 2009 SP - 0 EP - 0 KW - Video fluoroscopy KW - Lumber spine KW - Segmental instability KW - Kinematics KW - Motion N2 - Objective: Lumbar segmental instability (LSI) is one subgroup of nonspecific low back pain which its diagnosis has not been clarified. The aim of this study was to present a reliable and novel method for evaluation of lumbar spine kinematics in sagital plane. Materials & Methods: In this comparative and validity testing study, 15 low back patients suspected to have LSI and 15 matched healthy subjects were recruited. Pulsed digital videofluoroscopy was used to investigate kinematics of lumbar motion segments during flexion and extension movements. Segmental linear transition and angular displacement, and Pathway of Center of Rotation (PICR) were calculated for each lumbar motion segment. Movement pattern of lumbar spine between two groups and during range of motion were compared.Data were analyzed by statistical methods such as:Chi-square,Kolmogroff-Smirnoff, Independent T test avd ANOVA with repeated measurements. Results: Segmental linear transition was different in patients during both flexion and extension movements at L5-S1 segment (P M3 ER -