Prone hip extension has been used as a self-perturbation task to test the stability of the lumbopelvic region. However, the relationship between recruitment patterns in the hip and trunk muscles and lumbopelvic kinematics remains unknown. The present study aimed to examine if the balance of hip and trunk muscle activities are related to pelvic motion and low back muscle activity during prone hi...

[Purpose] The purpose of this study was to examine the influence of the cervical flexion angle when using a smart phone on muscle fatigue of the cervical erector spinae (CES) and upper trapezius (UT). [Subjects] This study recruited 12 healthy adults. [Methods] Each subject sat on a chair, with his/her back against the wall and held a smart phone with both hands. Fatigue of the neck and shoulde...

In 55 normal adult subjects standing erect, stable EMG responses could be recorded from the lumbar erector spinae muscles in response to unilateral sudden are abduction produced by single electrical stimuli applied to the brachial plexus at Erb's point, or to knee and ankle movement produced by stimuli to the posterior tibial nerve in the popliteal fossa.

Computed tomography scans of 96 women aged between 40 and 63 years were systematically measured to determine torso muscle moment arms and cross-sectional areas at L 2L 3, L 3L 4 and L 4L 5 disc levels. The major findings were as follows: (1) the mean muscle moment arm and area data were not different bilaterally; (2) psoas, quadratus lumborum, and latissimus dorsi muscle moment arms consistentl...

Renal cell carcinoma has a widespread and unpredictable metastatic potential and it can metastasize virtually to any site,1 even after a very long time from removal of the primary tumor.2 The most common sites for RCC metastasis are lungs, lymph nodes, liver, bones and adrenal glands.2,5 Skeletal muscle metastasis from RCC are extremely rare accounting 0.4% of all RCC metastasis.1e3 A limited n...

PURPOSE: The purpose of this study was to investigate the effects of isometric upper limb contraction on the trunk and lower extremity muscles during the sit-to-stand activity in elderly females. METHODS: Eighteen healthy elderly females performed three directional isometric upper extremity contractions (flexion, extension, and horizontal abduction movements) using an elastic band during sit-to...

This study examined the effects of regular practice of Tai Chi and jogging on neuromuscular reaction indicated by muscle latency of the trunk and lower limb muscles on the unperturbated side in older people during lateral postural perturbation. A total of 42 people aged 65 or older participated in this study, and formed Tai Chi group, jogging group, and sedentary control group based on their ex...

introduction: in this study we compared transcranial magnetic stimulation (tms) elicited motor evoked potentials (meps) in a postural (bilateral low back extension: blbe) and a respiratory (forced expiration during breath holding: febh) task.methods: using tms of the left motor cortex, simultaneous patterns of corticospinal facilitation of the contralateral erector spinae (es) and rectus abdomi...

Workers in grocery stores are exposed to numerous musculoskeletal risks that can be reduced using assistive devices while performing stocking tasks. A regional grocery store has recently deployed a mobile cart without comprehension of its ergonomic impact on workers, which this paper investigates using normalized electromyography data (%MVC). This paper studies not only ergonomic impact based o...

Automated massage machines have been widely used in family for the past few years, but there was limit scientific evidence to support for them positive effects. This paper aims to evaluate the massage effects on recovery of muscle fatigue and explore the optimal massage machine design parameters. Two subjects participated in prone bridge exercises to make the erector spinae muscles fatigue befo...