Skip to main content
main-content
Top

Tip

Swipe om te navigeren naar een ander artikel

01-12-2012 | Poster presentation | bijlage 1/2012 Open Access

Journal of Foot and Ankle Research 1/2012

Forefoot deformation during the stance phase of normal gait

Tijdschrift:
Journal of Foot and Ankle Research > bijlage 1/2012
Auteurs:
Saartje Duerinck, Friso Hagman, Ilse Jonkers, Peter Vaes, Peter Van Roy

Background

During human walking the ankle-foot complex executes seemingly contradictory functions: (1) stabilization of the human body at initial contact, (2) shock absorption during early stance [ 13], (3) Storing elastic energy during midstance and (4) providing a strong lever for push of during final stance [ 1]. This quadrupled function inevitably demands a transfer from a flexible and compliant foot towards a rigid lever [ 1]. Despite the viable role of the forefoot in this transfer, knowledge concerning the deformation of the forefoot is limited. The aim of this study is to provide a more detailed description of deformation occurring at the level of the forefoot during the stance phase of normal human walking.

Materials and methods

Using a seven-camera motion capture system (250Hz), a pressure platform (500Hz) and a forceplate (1250Hz), we measured forefoot deformation through kinematic and pressure related outcome measures in 60 healthy subjects.

Results

Small but significant changes in intermetatarsal distance are established during stance phase, with the largest change occurring between metatarsal head II/III and V (Table 1). The changes in intermetatarsal distance and metatarsal arch height show slightly different patterns. Both patterns are characterized by a rapid increase in distance during initial stance, reaching a stable platform throughout midstance. At the end of stance phase the intermetatarsal distances rapidly decrease to baseline, whereas the metatarsal arch height increases till a maximum at heel off (Figure 1- 5).
Table 1
Parameters characterizing the changes in medio-lateral arch height and mutual distances between metatarsal head I, II/III and V and metatarsal base I and V during stance phase and for the different subphases
 
StPh (mm)
HC (mm)
MF (mm)
MS (mm)
IPO (mm)
FPO (mm)
Max. MedioLat Height
1.13 ± 0.08
0.87 ± 0.07
0.87 ± 0.06
1.01 ± 0.04
1.13 ± 0.08
1.05 ± 0.10
Min. MedioLat Height
85.95 ± 8.95
4.39 ± 2.50
12.34 ± 3.32
47.25 ± 12.02
87.39 ± 7.73
95.88 ± 1.27
Max. distance HMTI-HMTV
1.01 ± 0.01
0.92 ± 0.02
0.96 ± 0.02
1.01 ± 0.01
1.00 ± 0.01
0.94 ± 0.02
Min. distance HMTI-HMTV
0.90 ± 0.02
0.90 ± 0.02
0.92 ± 0.02
0.96 ± 0.02
0.94 ± 0.02
0.91 ± 0.02
Max. distance HMTI-HMTII/III
1.01 ± 0.04
0.94 ± 0.04
0.95 ± 0.04
1.01 ± 0.03
1.01 ± 0.02
0.97 ± 0.04
Min. distance HMTI-HMTII/III
0.91 ± 0.04
0.92 ± 0.04
0.93 ± 0.04
0.95 ± 0.04
0.97 ± 0.04
0.93 ± 0.04
Max. distance HMTII/III- HMTV
1.01 ± 0.04
0.89 ± 0.05
0.94 ± 0.05
1.01 ± 0.04
1.01 ± 0.04
0.93 ± 0.04
Min. distance HMTII/III- HMTV
0.87 ± 0.05
0.87 ± 0.05
0.89 ± 0.05
0.94 ± 0.48
0.93 ± 0.04
0.90 ± 0.04
Max. distance BMTI-BMTV
1.00 ± 0.01
0.99 ± 0.01
0.99 ± 0.01
1.00 ± 0.01
1.00 ± 0.01
1.00 ± 0.01
Min. distance BMTI-BMTV
0.97 ±0.01
0.97 ± 0.01
0.99 ± 0.01
0.99 ± 0.01
0.98 ± 0.01
0.97 ± 0.01
Legend: StPh = stance phase, HC = heel contact, MF = metatarsal forming, MS = midstance, IPO = initial propulsion, FPO = final propulsion, max. = maximum, min. = minimum, HMT = head metatarsal, BMT = base metatarsal
High correlation values (>0.7 or <-0.7) are found between temporal pressure and temporal kinematic parameters.

Conclusion

Through stance the forefoot deforms according to a specific pattern, which is predominantly determined through forefoot-ground interaction. In addition, the changes in forefoot kinematics in combination with temporal contact data argue the existence of a mediolateral metatarsal arch and suggest the existence of an inverse arch during metatarsal forming and final propulsion phase.

Acknowledgement

The preparation of this abstract was funded by the Vrije Universiteit Brussel (i.e., GOA 59)

Onze productaanbevelingen

BSL Podotherapeut Totaal

Binnen de bundel kunt u gebruik maken van boeken, tijdschriften, e-learnings, web-tv's en uitlegvideo's. BSL Podotherapeut Totaal is overal toegankelijk; via uw PC, tablet of smartphone.

Literatuur
Over dit artikel

Andere artikelen bijlage 1/2012

Journal of Foot and Ankle Research 1/2012 Naar de uitgave