Forces on the first metatarsophalangeal joint: a pilot study

Area of Science:

• Biomechanics
• Human gait analysis
• Orthopedics

Background:

• The first metatarsophalangeal (MTP) joint is crucial for normal gait.
• Understanding forces on the MTP joint aids in diagnosing and treating foot pathologies.

Purpose of the Study:

• To investigate the forces acting on the first MTP joint during the contact phase of gait.
• To correlate ground reaction forces with the angular displacement of the proximal phalanx.

Main Methods:

• A pilot study utilizing a force plate to measure ground reaction forces.
• Simultaneous video recording to capture angular displacement of the proximal phalanx at the first MTP joint.
• Analysis of the contact phase of the normal gait cycle.

Main Results:

• Peak ground reaction force measured was 1.16 times body weight.
• Maximal dorsiflexion of the proximal phalanx occurred 0.09 seconds post-peak ground reaction force.
• The mean range of motion observed was 31.54 degrees.

Conclusions:

• The study provides initial data on the biomechanics of the first MTP joint during gait.
• Findings suggest a specific temporal relationship between ground impact forces and joint movement.
• Further research is warranted to explore clinical implications.