A reliability study of biomechanical foot function in psoriatic arthritis based on a novel multi-segmented foot model

Reliability study of tibialis posterior and selected leg muscle EMG and multi-segment foot kinematics in rheumatoid arthritis associated pes planovalgus

“…We confirmed previous observations where larger foot segments have greater reliability both within- and between-days in the sagittal plane in comparison with smaller segments with smaller ranges of motion, particularly in the frontal and transverse planes. Inflammatory joint diseases present challenges for identification of surface landmarks, in particular when joints are swollen, tender and deformed [13]. Nevertheless, the model presented here showed excellent reliability for discrete variables both barefoot and shod.…”

Achilles tendon biomechanics in psoriatic arthritis patients with ultrasound proven enthesitis

“…The gastrocnemius and soleus muscles are the main muscles forming the AT and provide postural control and power during the propulsive phase of gait (2,10). The AT crosses the ankle and subtalar joints and is subject to complex rotational movements (2,9). Insufficient posterior calf muscle strength is associated with poor control of foot pronation during foot loading (10).…”

“…An eight-camera, 120-Hz, 3D motion analysis system (Qualysis Oqus, Gothenburg, Sweden) was used to track the motion during gait of a multi-segmented foot model as reported previously (9). Ground reaction forces (120 Hz) were measured using a single force plate (Kistler, Winterthur, Switzerland).…”

A multi-segment foot model based on anatomically registered technical coordinate systems: Method repeatability in pediatric feet

“…Variability: Most of the previous literature on foot model variability was conducted on adult subjects [25][26][27][28][29] which may not be applicable to pediatric subjects. Additionally, use of a plantar surface reference or normative based axis [28] result in lower variability.…”