Estimating Co-Contraction Activation of Trunk Muscles Using a Novel Musculoskeletal Model for Pregnant Women
نویسندگان
چکیده
Weight gain and stretched abdominal muscles from an enlarged gravid uterus are remarkable features during pregnancy. These changes elicit postural instability and place strain on body segments, contributing to lower back pain. In general, the agonist and antagonist muscles act simultaneously to increase joint stabilization; however, this can cause additional muscle stress during movement. Furthermore, this activation can be observed in pregnant women because of their unstable body joints. Hence, physical modalities based on assessments of muscle activation are useful for managing low back pain during pregnancy. Musculoskeletal models are common when investigating muscle load. However, it is difficult to apply such models to pregnant women and estimate the co-contraction of muscles using musculoskeletal models. Therefore, the purpose of this study is to construct a musculoskeletal model for pregnant women that estimates the co-contraction of trunk muscles. First, motion analysis was conducted on a pregnant woman and the muscle activations of the rectus abdominis and erector spinae were measured. Then, the musculoskeletal model was specifically modified for pregnant women. Finally, the co-contraction was estimated from the results of the musculoskeletal model and electromyography data using a genetic algorithm. With the proposed methods, weakened abdominal muscle torque and the co-contraction activation of trunk muscles were estimated successfully.
منابع مشابه
همزمانی انقباض عضلات شکمی با عضلات کف لگن: مروری نظام مند بر مطالعات گذشته
Background and purpose: Recent research indicated that there is a co-activation of pelvic floor muscles (PFM) and abdominal muscles during voluntary and involuntary activity as a normal function, which may be impaired in women with stress urinary incontinency (SÜÏ). The purpose of the present study was to review the previously published studies concerning co-activation of abdominal and PFM wi...
متن کاملInfluence of trunk muscle co-contraction on spinal curvature during sitting.
BACKGROUND AND PURPOSE Slumped sitting is known to increase disc pressure and aggravate chronic low back pain. In addition, it has been recognized that co-contraction of the deep spine-stabilizing muscles enhances lumbar segmental stability and the sacro-iliac joint. The purpose of this study was to compare the electromyographic (EMG) activity of the trunk muscles and the muscle thickness of th...
متن کاملThe effect of Swedish massage on pain, flexion range of motion, the electrical activity of the quadriceps muscles, and their co-contraction with the hamstring muscles during walking in women with medial compartment knee osteoarthritis: a randomized c
Introduction: Knee osteoarthritis (KOA) is associated with decreased muscle strength, muscle activity, and impaired knee range of motion (ROM). This study aimed to investigate the effect of Swedish massage on pain, the flexion of knee joint ROM, the electrical activity of the quadriceps muscles, and their co-contraction with the hamstring muscles during walking in women with medial compartment ...
متن کاملIs Abdominal Muscle Activity Different from Lumbar Muscle Activity during Four-Point Kneeling?
Background: Stabilization exercises can improve the performance of trunk and back muscles, which are effective in the prevention and treatment of low back pain. The four-point kneeling exercise is one of the most common types of stabilization exercises. This quasi-experimental study aimed to evaluate and compare the level of activation between abdominal and lumbar muscles in the different stage...
متن کاملEMG Activity of Trunk Muscles in Patients with Chronic Low Back Pain after Fatigue
Fatigue, Abdominal muscle, EMG, co-contraction, loading Background: Low back pain (LBP) is one of the most prevalent musculoskeletal disorders. Altered movement patterns in LBP patients can reflect changes in neuromuscular control. Objective: This study aimed to assess trunk muscle electromyographic (EMG) response after trunk extensor muscle fatigue in LBP subjects. Methods: Sixteen patients wi...
متن کامل