Facts about Tarsometatarsal joint
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Anatomical studies reveal that the second metatarsal base sits approximately 2-3 millimeters recessed relative to the first and third metatarsal bases at the tarsometatarsal joint, creating a critical keystone structure for midfoot stability.
- 09
Metatarsal base alignment at the tarsometatarsal joint normally maintains a consistent medial-to-lateral declination angle of approximately 10 degrees, which is critical for proper longitudinal arch mechanics.
- 08
Five tarsometatarsal joints exist in each foot, with the medial three articulating with the three cuneiforms and the lateral two connecting to the cuboid bone for a complex multi-segmented structure.
- 07
Surgical fusion of the tarsometatarsal joint typically involves two to three cortices of screw fixation to restore stability after ligamentous disruption.
- 06
Compression of the tarsometatarsal joint during weight-bearing activities can increase interarticular pressure by up to 300 percent compared to resting levels.
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Dorsiflexion at the tarsometatarsal joint occurs primarily through medial column movement, while the lateral metatarsals remain relatively rigid to provide propulsive force during gait.
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Disruption of the plantar Lisfranc ligament, which connects the medial cuneiform to the base of the second metatarsal, represents the most common ligamentous injury pattern in tarsometatarsal joint sprains.
- 03
Plantarflexion and inversion movements at the tarsometatarsal joint are restricted by multiple ligaments, including the strong plantar ligament that provides greater stability than the dorsal ligament.
- 02
Injuries to the tarsometatarsal joint account for approximately 0.2% of all foot fractures, yet they frequently go undiagnosed on initial radiographs in emergency departments.
- 01
The tarsometatarsal joint, also called Lisfranc joint, transmits approximately 50 percent of body weight during the push-off phase of walking.