STUDY DESIGN In vivo laboratory studies were conducted to investigate the spine loads imposed on men and women during a series of lifting tasks that varied in the degree of lifting control required by the subject. OBJECTIVE To identify and understand differences in spine loading and musculoskeletal control strategies between men and women performing lifts of varying task complexity. SUMMARY...

s 8 Session 1: Intervertebral Discs 9 Session 2: Spinal Motion Segment: Load Sharing and Failure 16 Session 3: Spinal Loads: In vivo Measurements 20 Session 4: Spinal Biomechanics: Loading-Deformation 25 Session 5: Spinal Posture: Deformation 29 Session 6: Spinal Stability: Perturbations 34 Session 7: Spine Biomechanics: Computational Models 39 Session 8: Spine Biomechanics: Implants 44 Index o...

Masonry workers face some of the highest physical demands in the construction industry where large bags of masonry material weighing 42.7 kg are commonly handled by mason tenders who mix the mortar, distribute mortar and bricks/blocks, and erect/dismantle scaffolding throughout the day. The objective of this study was to determine the effectiveness of using half-weight bags (21.4 kg) on reducin...

Current neck injury criteria do not include limits for lateral bending combined with axial compression and this has been observed as a clinically relevant mechanism, particularly for rollover motor vehicle crashes. The primary objectives of this study were to evaluate the effects of lateral eccentricity (the perpendicular distance from the axial force to the centre of the spine) on peak loads, ...

background & importance: hydatid disease of the spine is rare but constitutes approximately 50% of bone involvement cases in human hydatidosis. it is a severe condition associated with a high rate of morbidity, disability and mortality. case presentation: in the present paper, we report an intriguing case of cervical spinal hydatid disease mimicking traumatic burst fracture. conclusion: a high ...

Previous curved muscle models have typically examined their robustness only under simple, single-plane static exertions. In addition, the empirical validation of curved muscle models through an entire lumbar spine has not been fully realized. The objective of this study was to empirically validate a personalized biologically-assisted curved muscle model during complex dynamic exertions. Twelve ...

spinal traumatic injuries are the major damage which is associated with morbidity and mortality rates. in this study the epidemiological characteristics of spinal trauma and their outcome were investigated. in this cross sectional study, trauma patients who admitted to imam reza hospital were included. their information such as age, sex, type of injury, severity of injury and site of injury was...

background: one of the important sites for extrapulmonary tb involvement is the skeleton. tuberculous spondylitis (pott’s disease) comprises 50-70% of the skeletal tuberculosis. methods: in this case series study, we prospectively investigated the result of anterior surgery alone (anterior debridement, fusion and instrumentation) in the patients with spinal tuberculosis. the patients with immat...

White and Panjabi (1) defined the concept of “clinical stability” as the ability of spine to limit the deformation examples to prevent damaging and irritation of the spinal cord and nerve roots by the spine under physiological loads and to prevent pain arising from deformation or structural changes. Spinal stability responds differently to various forms of physiological loading and provides the...

The objective of this study was to investigate potential associations between an individual's psychophysical maximum acceptable force (MAF) during pushing tasks and biomechanical tissue loads within the lumbar spine. Ten subjects (eight males, two females) pushed a cart with an unknown weight at one push every two minute for a distance of 3.9 m. Two independent variables were investigated, cart...