The aim of this study is to model the hand–arm system during fastening operation using shear fasteners. Fastening using powered hand-tool generates considerable dynamic forces caused by the impact delivered to the hand–arm at the end of the operation because of fastener shear-off. The hand–arm is modeled as a rotational single-degree-of-freedom system. The values of the model parameters are obt...

A new system for measuring strength of the hand using a torsion dynamometer linked to a microprocessor is described. The system permits analysis of timed squeezes of both grip and pinch and is adjustable to all sizes of hand and degrees of hand deformity. Results obtained with the system were found to be reproducible, and the rigid device was acceptable to a group of patients with arthritic han...

We present and validate a test able to provide reliable body sway measurements in air pistol shooting, without the use of a gun. 46 senior male pistol shooters who participated in Spanish air pistol championships participated in the study. Body sway data of two static bipodal balance tests have been compared: during the first test, shooting was simulated by use of a dumbbell, while during the s...

The Madelung deformity can result in pain and decreased function of the wrist and hand. None of the surgical techniques available has been shown consistently to improve grip strength, range of movement or relieve pain. In this prospective study we have treated 18 patients with the Madelung deformity (25 wrists) by wedge subtraction osteotomy of the radius and shortening of the ulna. Our results...

The present investigation was aimed to assess the extent of variation in grip strength in relation to the sex and type of deformity among the orthopedically challenged persons affected with upper extremity and to compare the grip strength with that of control (normal) persons. For this purpose 213 subjects having the age range 20-60 years were selected at random. Among them 109 subjects were or...

BACKGROUND This study compares the wear characteristics in slipped capital femoral epiphysis (SCFE) with those of primary osteoarthritis (OA) in adult patients with advanced arthritis. METHODS One hundred femoral heads and proximal neck specimens were studied from SCFE patients (16 hips) and from primary OA (84 hips) patients undergoing total hip arthroplasties (THA). Grade 4 chondromalacia w...

BACKGROUND Femoroacetabular impingement (FAI) is reportedly a prearthritic condition in young adults that can progress to osteoarthritis. However, the prevalence of FAI is unknown in the young, active population presenting with hip complaints. QUESTIONS/PURPOSES We sought to determine (1) the prevalence of radiographic findings of FAI in a young, active patient population with complaints loca...

The handle of a commercial bar clamp was redesigned using ergonomic principles and then compared with an original clamp. Ten male and ten female students participated in simulated clamping tasks under various conditions, including different clamping heights, clamping methods, and handle-gripping methods, with respect to the dependent variables of clamping and handle-squeezing forces. The result...

BACKGROUND A cross-sectional study was performed to describe the upper limb deformity and function in cerebral palsy patients and to determine the correlation of deformity, spasticity, motor control, and sensation to hand function in the said population. MATERIALS AND METHODS Thirty patients satisfying our inclusion criteria underwent physical, sensory, and functional assessment using a stand...

Databases have been used to record data in forensic science, such as fingerprints, shoeprints, and photos. In traditional databases, we use "text" as the "keyword" for retrieving data (text-keyword retrieval); however, in some applications, "text" is not proper to describe the searching target, and in this case, "image" plays an important role. In this paper, we use "image features" as the "key...