Background: Femoroacetabular impingement (FAI) syndrome, or hip impingement, is a musculoskeletal condition affecting the joint. It involves motion- position-related pain originating from an abnormal, premature contact between femoral head-neck junction (femur) and acetabular rim (rim around socket). Cumulative repetitive mechanical overloads at joint appear to contribute development of FAI. Ho...

Because eye muscles never cocontract and do not deal with external loads, one can write an equation that relates motoneuron firing rate to eye position and velocity a very uncommon situation in the CNS. The semicircular canals transduce head velocity in a linear manner by using a high background discharge rate, imparting linearity to the premotor circuits that generate eye movements. This has a...

Rear-end impacts caused worse initial symptoms and specific clinical findings, not clearly distinguished from those occurring after frontal impacts. WAD III injuries, retro-orbital pain, and isolated contra-directional pro-/retraction pain occurred more frequently after rear-end impacts, indicating the importance of shear loads and craniocervical junction vulnerability. Head inward rotation dur...

Torsion shafts are the main elastic element of suspension systems a large number vehicles. To simulate their reaction to action torque, stress-strain state is analyzed taking into account contact interaction with spline sleeve. The features distribution pressure between these bodies established. nature stress concentration in splined hollows shaft head determined. Models and research methods ha...

The ability of a helmet to reduce injury to the wearer in the first instance depends on whether it is securely in place during the impact. A helmet may be displaced or even ejected during a crash if it has been incorrectly fastened, worn, or inappropriately sized for the wearer's head. In the current pedal and motorcycle helmet standards, the propensity of a helmet to roll off the head in a cra...

There is currently concern and controversy in the shrimp industries of the Americas about the risk posed by the importation and reprocessing of shrimp infected with white spot syndrome virus (WSSV) and yellow head virus (YHV). To further understand the risk, more knowledge concerning the quantitative virus load of infected shrimp is needed. The present study was carried out to better define, us...

A hybrid hydropower power plant is a conventional Hydro-Power Plant (HPP) augmented with Battery Energy Storage System (BESS) to decrease the wear of sensitive mechanical components and improve reliability regulation performance plant. central task controlling HPP determining how total setpoint split between BESS hydraulic turbine (power splitting). This paper describes Model Predictive Control...

Purpose. To study the effect of short-term hypoxic exposure on correlation between microcirculatory parameters (MCR) symmetric areas human head. Materials and methods. MCR 10 healthy male volunteer were measured by laser Doppler flowmetry method. Short-term was produced according to test method using ReOxy Cardio unit (S. A. Aimediq). We assessed perfusion metrics left right interest, neurogeni...

Proximal humerus fractures are common and have a bimodal age distribution. Fracture-dislocations in younger patients result from highenergy trauma and most surgeons attempt open reduction and internal fixation, if at all possible. Osteoporotic fractures in elderly patients are commonly associated with low-energy trauma such as groundlevel falls and most are minimally displaced, impacted fractur...

STUDY DESIGN In vitro experiments using cadaveric cervical spine motion segments to quantify facet capsular ligament strain during whiplash-like loading. OBJECTIVE To quantify facet capsule strains during whiplash-like loading with an axial intervertebral prerotation simulating an initial head-turned posture and to then compare these strains to previously-published strains for partial failure...