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Based on the scientific evidence in published literature about precipitation of musculoskeletal injuries in the workplace, four theories have been proposed to explain these afflictions. Central to all theories is the presupposition that all occupational musculoskeletal injuries are biomechanical in nature. Disruption of mechanical order of a biological(More)
OBJECTIVES The objectives of the study were to determine the phasic recruitment of cervical muscles with increasing magnitudes of low velocity frontal impacts, and to determine quantitative effects of awareness of impending impact in comparison to being impacted unawares. BACKGROUND Biomechanics of low velocity frontal impact is poorly understood and(More)
The association between cumulative load (biomechanic load and exposure time integral over the entire work experience) and back pain was investigated in a group of institutional aides with physically stressful jobs. A questionnaire/interview was conducted with 161 of these institutional aides. The point prevalence of back pain in this sample was 62%. Men had(More)
STUDY DESIGN Experimental analysis was performed to determine the effects of low-velocity rear-end impacts on phasic and magnitudinal activity of the cervical muscles in expected and unexpected conditions. OBJECTIVES To determine the phasic response of the cervical muscles to increasing low-velocity rear-end impacts, and to compare the quantitative(More)
STUDY DESIGN To determine the functional capability in asymmetric trunk motion, isometric and isokinetic lateral flexion and axial rotation strengths of a normal and patient samples were measured. Seventy-three normal asymptomatic subjects (41 males and 32 females) and ten patients (9 males and 1 female) were tested. OBJECTIVES The dual objectives of the(More)
The purpose of the current study was twofold: (1) to determine the isometric force and electromyographic (EMG) relationship of the sternocleidomastoid, splenii and trapezii muscles bilaterally in graded and maximal exertions in the sagittal, coronal and oblique planes. and (2) to develop regression equations to predict force based on the EMG scores. A newly(More)
Low back pain (LBP) is a common problem that is costly in both financial and human terms. The impact of LBP on an individual varies greatly. For some, LBP is a minor inconvenience; but for others LBP is associated with significant disability and with psychosocial dysfunction for the individual and for the family. Whether psychosocial factors are causes or(More)
Studies show that the cumulative prevalence of low back pain (LBP) in juveniles was close to 30%. The majority of the LBP was mild. Of those with LBP approximately 8% sought medical treatment. Chronic or recurrent LBP averaged 8.1% of the adolescent populations studied. The cumulative prevalence of LBP increased with age. One study showed a cumulative(More)
To the memory of A. Ramanathan Let G be a semisimple, simply connected algebraic group over an algebraically closed field of characteristic p > 0. Let U be the unipotent radical of a Borel subgroup B ⊂ G and u the Lie algebra of U. Springer [16] has shown for good primes, that there is a B-equivariant isomorphism U → u, where B acts through conjugation on U(More)