Foot structure is significantly associated to subtalar joint kinetics and mechanical energetics

NewsBot · Jul 22, 2017

Members do not see these Ads. Sign Up.
Foot structure is significantly associated to subtalar joint kinetics and mechanical energetics
Jayishni N. Maharaj et al
Gait and Posture July 21, 2017

Highlights
•Foot posture measurements did not predict subtalar joint (STJ) kinematics.
•Arch-height ratio was positively related to STJ moments and energy absorption.
•Step width may be a modifiable gait parameter that may reduce STJ moments.
Click to expand...

Introduction/Aim
Foot structure has been implicated as a risk factor of numerous overuse injuries, however, the mechanism linking foot structure and the development of soft-tissue overuse injuries is not well understood. The aim of this study was to identify factors that could predict foot function during walking.

Methods
A total of eleven variables (including measures of foot structure, anthropometry and spatiotemporal gait characteristics) were investigated for their predictive ability on identifying kinematic, kinetic and energetic components of the foot. Three-dimensional motion capture and force data were collected at preferred walking speed on an instrumented treadmill. Mechanical measures were subsequently assessed using a custom multi-segment foot model in Opensim. Factors with significant univariate associations were entered into multiple linear regression models to identify a group of factors independently associated with the mechanical measures.

Results
Although no model could be created for any of the kinematic measures analysed, approximately 46% and 37% of the variance in the kinetic and energetic measures were associated with three or two factors respectively. Arch-height ratio, foot length and step width were associated with subtalar (STJ) joint moments, while greater STJ negative work was correlated to a low arch-height ratio and greater foot mobility.

Conclusion
The models presented in this study suggest that the soft-tissue structures of a flat-arched, mobile foot are at a greater risk of injury as they have greater requirements to absorb energy and generate larger forces. However, as these associations are only moderate, other measures may also have an influence.
Click to expand...

NewsBot · Sep 29, 2018

Relative movement on the articular surfaces of the tibiotalar and subtalar joints during walking.
Phan CB et al
Bone Joint Res. 2018 Sep 15;7(8):501-507.

OBJECTIVES:
The objective of this study was to quantify the relative movement between the articular surfaces in the tibiotalar and subtalar joints during normal walking in asymptomatic individuals.

METHODS:
3D movement data of the ankle joint complex were acquired from 18 subjects using a biplanar fluoroscopic system and 3D-to-2D registration of bone models obtained from CT images. Surface relative velocity vectors (SRVVs) of the articular surfaces of the tibiotalar and subtalar joints were calculated. The relative movement of the articulating surfaces was quantified as the mean relative speed (RS) and synchronization index (SIENT) of the SRVVs.

RESULTS:
SIENT and mean RS data showed that the tibiotalar joint exhibited translational movement throughout the stance, with a mean SIENT of 0.54 (sd 0.21). The mean RS of the tibiotalar joint during the 0% to 20% post heel-strike phase was 36.0 mm/s (sd 14.2), which was higher than for the rest of the stance period. The subtalar joint had a mean SIENT value of 0.43 (sd 0.21) during the stance phase and exhibited a greater degree of rotational movement than the tibiotalar joint. The mean relative speeds of the subtalar joint in early (0% to 10%) and late (80% to 90%) stance were 23.9 mm/s (sd 11.3) and 25.1 mm/s (sd 9.5), respectively, which were significantly higher than the mean RS during mid-stance (10% to 80%).

CONCLUSION:
The tibiotalar and subtalar joints exhibited significant translational and rotational movement in the initial stance, whereas only the subtalar joint exhibited significant rotational movement during the late stance. The relative movement on the articular surfaces provided deeper insight into the interactions between articular surfaces, which are unobtainable using the joint coordinate system.
Click to expand...

NewsBot · Jul 2, 2020

Walking With Added Mass Magnifies Salient Features of Human Foot Energetics
Nikolaos Papachatzis et al
J Exp Biol. 2020 Jun 26;223

The human foot serves numerous functional roles during walking, including shock absorption and energy return. Here, we investigated walking with added mass to determine how the foot would alter its mechanical work production in response to a greater force demand. Twenty-one healthy young adults walked with varying levels of added body mass: 0%, +15% and +30% (relative to their body mass). We quantified mechanical work performed by the foot using a unified deformable segment analysis and a multi-segment foot model. We found that walking with added mass tended to magnify certain features of the foot's functions. Magnitudes of both positive and negative mechanical work, during stance in the foot, increased when walking with added mass. Yet, the foot preserved similar amounts of net negative work, indicating that the foot dissipates energy overall. Furthermore, walking with added mass increased the foot's negative work during early stance phase, highlighting the foot's role as a shock-absorber. During mid to late stance, the foot produced greater positive work when walking with added mass, which coincided with greater work from the structures spanning the midtarsal joint (i.e. arch). While this study captured the overall behavior of the foot when walking with varying force demands, future studies are needed to further determine the relative contribution of active muscles and elastic tissues to the foot's overall energy.
Click to expand...

NewsBot · Oct 6, 2023

Anatomical Features of the Tarsal Sinus in Patients with Pes Planus: Implications for Clinical Management
Taiyuan Guan , Yong Ma
Med Sci Monit. 2023 Sep 21:29:e940687. doi: 10.12659/MSM.940687.

BACKGROUND In the treatment of pes planus, if the implant does not match the anatomical structures of the sinus tarsi, synovitis can develop, causing pain symptoms. In the interest of making clinical recommendations for extra-osseous talotarsal stabilization, the goal of the present study was to characterize the anatomical characteristics of the sinus tarsi in patients with pes planus using magnetic resonance imaging (MRI) scans. MATERIAL AND METHODS This was a retrospective study involving 56 pes planus patients and 56 healthy volunteers from January 2014 to May 2022. The sinus tarsi was measured for length and width, for angle with the coronal and sagittal axes, and for length of the subtalar implant. RESULTS All examined metrics showed a difference between pes planus patients and healthy participants, with the exception of the subtalar implant's length. The average sinus tarsi length and width among pes planus patients were 19.23 mm and 2.91 mm, respectively. The angle between the sinus tarsi and the coronal and sagittal axes was 21.418° and 25.077°, while the length of approach was 33.06 mm and 0.76°. The only gender differences that were statistically significant were in the length and width of the sinus tarsi. There were no notable variations between the left and right sides. CONCLUSIONS Sinus tarsi morphology may be impacted by pes planus. When treating patients with pes planus, clinicians should take these anatomical factors into consideration since they might more completely characterize the anatomical features of the sinus tarsi.
Click to expand...

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

NewsBot The Admin that posts the news.

Personality Traits linked to Foot Structures

Vascular Structure of the Foot

"Haleem’s Hen"; A mnemonic for the anatomy of hindfoot structures

A New Classification of Foot Structures Based on Foot Embryology is proposed

Palpation Skills in Foot and Ankle Anatomic Structures

A New Classification of Foot Structures Based on Foot Embryogenesis

Increasing Physical Activity Might Be More Effective to Improve Foot Structure and Function Than Wei

Share This Page