CONTEXT Hip-muscle impairments are associated with a variety of lower-extremity dysfunctions. Accurate assessment in the clinical setting can be challenging due to the strength of hip muscles relative to examiner strength. OBJECTIVE To examine the influence of examiner strength and technique on manual hip-strength testing using a handheld dynamometer. DESIGN Repeated measures. SETTING Res...

As clinicians become more involved in preventative screening, assessment, and treatment of newborns and infants, an increasing need exists for quantitative, normal joint range-of-motion data for this population. We used a goniometer to assess in 40 healthy, full-term newborns the following passive ranges of motion: hip extension, knee extension, ankle plantar flexion, ankle dorsiflexion, and th...

Hip position and loading of limb extensors are major sensory cues for the initiation and duration of different phases during walking. Although these inputs have pathways projecting to the locomotor rhythm generator, their effects may vary in different parts of the locomotor cycle. In the present study, the plantaris (Pl), sartorius (Sart), rectus femoris (RF), and caudal gluteal (cGlu) nerves w...

OBJECTIVE To differentiate hip and trunk motion during double-leg stance. DESIGN Trunk and hip angular position variances were measured on different support surfaces with and without vision. BACKGROUND Postural control results from motion about the hips and trunk during bilateral stance. While the hip joint has been studied extensively, information concerning relative amounts of hip and tru...

Instability of the hip joint in the young adult is a difficult problem. Patients with an unstable hip secondary to any aetiology usually have loss of bone from the proximal femur or shortening of the limb or both. In this study we report our results in the treatment of the unstable hip joint in young adults by pelvic support osteotomy using the Ilizarov method. From 1997 to 2004, 25 patients (1...

[Purpose] To investigate the features of backward walking in stroke patients with hemiplegia by focusing on the joint movements and moments of the paretic side, walking speed, stride length, and cadence. [Subjects and Methods] Nine stroke patients performed forward walking and backward walking along a 5-m walkway. Walking speed and stride length were self-selected. Movements were measured using...

The purpose of this study was to develop regression equations predicting torque output throughout the range of motion for the human elbow, shoulder, knee, and hip. Twenty-two healthy males participated. Torque values throughout the sagittal plane range of motion (i.e., flexion and extension) of the right elbow, shoulder, knee and hip were recorded (isokinetic dynamometer, 1 rad/sec) and express...

The purpose of this study was to investigate the correlations between biomechanical outcome measures and weightlifting performance. Joint kinematics and kinetics of the hip, knee, and ankle were calculated while 10 subjects performed a clean at 85% of 1 repetition maximum (1RM). Kinematic and kinetic time-series patterns were extracted with principal components analysis. Discrete scores for eac...

Extensive osseous adaptations of the lumbar spine, pelvis, hip and femur characterize the emergence of the human bipedal gait with its 'double extension' of the lumbar spine and hip. To accommodate lumbar lordosis, the pelvis was 'compacted', becoming wider and shorter, as compared with the non-human apes. The hip joint acquired a much more extended position, which can be seen in a broader evol...

The Host Identity Protocol (HIP) is a recent protocol proposal for secure host mobility and multihoming using a cryptographic-based name space for Internet hosts. HIP aims to decouple IP addresses from transport connections in a secure manner, thereby admitting network-level mobility and multihoming solutions that do not require the use of a single IP address as a host identifier. Although HIP ...