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Evidence for early stance phase pre-loading of the plantar aponeurosis

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An inverse dynamics approach has been used to gain an insight into the mechanical behaviour of the plantar aponeurosis (PA) at different walking speeds... Mechanical and finite element models have evaluated its biomechanics in quasi static conditions... To our knowledge only one study has addressed the dynamic behaviour of the PA with relation to the Achilles tendon force... An ad hoc 12 markers protocol, modification of, was designed to record the kinematics of heel, metatarsal bones and toes at different walking speeds... Commercial software for multibody dynamics analysis (MSC.Adams) was used to build the model geometry and to calculate the elongation trajectories for five segments of the PA based on stance phase kinematics data (Figure 1)... The metatarsal heads were modelled as cylinders under the metatarso-phalangeal joints... The windlass mechanism of the PA was modelled by contact elements that constrained the PA segments to wrap around the metatarsal heads... Bulk PA stiffness was distributed equally among the five digits and was used to estimate segmental PA tension... Peak PA tension occurred in late stance phase (~1.5 BW) for all walking speeds and was similar in magnitude to cadaver simulation data... Early stance phase PA tension increased systematically with walking speed (Figure 2).

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The 7 segments multibody model. In yellow the motion agents driving the segments in the inverse dynamics analysis.
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Figure 1: The 7 segments multibody model. In yellow the motion agents driving the segments in the inverse dynamics analysis.

Mentions: Commercial software for multibody dynamics analysis (MSC.Adams) was used to build the model geometry and to calculate the elongation trajectories for five segments of the PA based on stance phase kinematics data (Figure 1). The metatarsal heads were modelled as cylinders under the metatarso-phalangeal joints. The windlass mechanism of the PA was modelled by contact elements that constrained the PA segments to wrap around the metatarsal heads. Bulk PA stiffness [5] was distributed equally among the five digits and was used to estimate segmental PA tension.


Evidence for early stance phase pre-loading of the plantar aponeurosis
The 7 segments multibody model. In yellow the motion agents driving the segments in the inverse dynamics analysis.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC2562124&req=5

Figure 1: The 7 segments multibody model. In yellow the motion agents driving the segments in the inverse dynamics analysis.
Mentions: Commercial software for multibody dynamics analysis (MSC.Adams) was used to build the model geometry and to calculate the elongation trajectories for five segments of the PA based on stance phase kinematics data (Figure 1). The metatarsal heads were modelled as cylinders under the metatarso-phalangeal joints. The windlass mechanism of the PA was modelled by contact elements that constrained the PA segments to wrap around the metatarsal heads. Bulk PA stiffness [5] was distributed equally among the five digits and was used to estimate segmental PA tension.

View Article: PubMed Central - HTML

AUTOMATICALLY GENERATED EXCERPT
Please rate it.

An inverse dynamics approach has been used to gain an insight into the mechanical behaviour of the plantar aponeurosis (PA) at different walking speeds... Mechanical and finite element models have evaluated its biomechanics in quasi static conditions... To our knowledge only one study has addressed the dynamic behaviour of the PA with relation to the Achilles tendon force... An ad hoc 12 markers protocol, modification of, was designed to record the kinematics of heel, metatarsal bones and toes at different walking speeds... Commercial software for multibody dynamics analysis (MSC.Adams) was used to build the model geometry and to calculate the elongation trajectories for five segments of the PA based on stance phase kinematics data (Figure 1)... The metatarsal heads were modelled as cylinders under the metatarso-phalangeal joints... The windlass mechanism of the PA was modelled by contact elements that constrained the PA segments to wrap around the metatarsal heads... Bulk PA stiffness was distributed equally among the five digits and was used to estimate segmental PA tension... Peak PA tension occurred in late stance phase (~1.5 BW) for all walking speeds and was similar in magnitude to cadaver simulation data... Early stance phase PA tension increased systematically with walking speed (Figure 2).

No MeSH data available.