Tehran University of Medical Sciences

Science Communicator Platform

Stay connected! Follow us on X network (Twitter):
Share By
Goal Equivalent Manifold Analysis of Task Performance in Non-Specific Lbp and Healthy Subjects During Repetitive Trunk Movement: Effect of Load, Velocity, Symmetry Publisher Pubmed



Chehrehrazi M1 ; Sanjari MA2 ; Mokhtarinia HR3 ; Jamshidi AA4 ; Maroufi N4 ; Parnianpour M5
Authors

Source: Human Movement Science Published:2017


Abstract

Motor abundance allows reliability of motor performance despite its variability. The nature of this variability provides important information on the flexibility of control strategies. This feature of control may be affected by low back pain (LPB) and trunk flexion/extension conditions. Goal equivalent manifold (GEM) analysis was used to quantify the ability to exploit motor abundance during repeated trunk flexion/extension in healthy individuals and people with chronic non-specific LBP (CNSLBP). Kinematic data were collected from 22 healthy volunteers and 22 CNSLBP patients during metronomically timed, repeated trunk flexion/extension in three conditions of symmetry, velocity, and loading; each at two levels. A goal function for the task was defined as maintaining a constant movement time at each cycle. Given the GEM, flexibility index and performance index were calculated respectively as amounts of goal-equivalent variability and the ratio of goal-equivalent to non-goal-equivalent variability. CNSLBP group was as similar as healthy individuals in both flexibility index (p = 0.41) and performance index (p = 0.24). Performance index was higher in asymmetric (p < 0.001), high velocity (p < 0.001), and loaded (p = 0.006) conditions. Performance and flexibility in using motor abundance were influenced by repeated trunk flexion/extension conditions. However, these measures were not significantly affected by CNSLBP. © 2016 Elsevier B.V.
Other Related Docs
19. Back Muscle Function in Older Women With Age-Related Hyperkyphosis: A Comparative Study, Journal of Manipulative and Physiological Therapeutics (2019)
20. Reliability and Validity of Athletes Disability Index Questionnaire, Clinical Journal of Sport Medicine (2018)