Intermetatarsal joints

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Intermetatarsal joints

The intermetatarsal joints are the articulations between the bases of the metatarsal bones in the foot. These joints play a crucial role in the stability and flexibility of the foot, allowing for the distribution of weight and the accommodation of various surfaces during movement.

Anatomy

The intermetatarsal joints are formed by the bases of the five metatarsal bones. These bones are numbered from one to five, starting from the medial (inner) side of the foot. The joints are classified as synovial joints, specifically plane type, which allows for limited gliding movements.

Ligaments

The stability of the intermetatarsal joints is maintained by several ligaments:

• The dorsal intermetatarsal ligaments connect the dorsal aspects of the adjacent metatarsal bases.
• The plantar intermetatarsal ligaments connect the plantar aspects of the adjacent metatarsal bases.
• The interosseous intermetatarsal ligaments are strong bands that connect the adjacent metatarsal bones.

Joint Capsule

Each intermetatarsal joint is enclosed by a joint capsule, which is lined with a synovial membrane. The synovial fluid within the capsule helps to lubricate the joint, reducing friction during movement.

Function

The primary function of the intermetatarsal joints is to provide stability to the foot while allowing for slight movements that contribute to the flexibility and adaptability of the foot during walking, running, and other activities. These joints help in the distribution of weight across the foot and play a role in maintaining the arches of the foot.

Clinical Significance

Problems with the intermetatarsal joints can lead to various foot conditions, such as:

• Intermetatarsal bursitis: Inflammation of the bursa located between the metatarsal bones.
• Morton's neuroma: A painful condition affecting the nerves between the metatarsal bones, often associated with the intermetatarsal joints.
• Metatarsalgia: Pain and inflammation in the ball of the foot, which can be related to issues with the intermetatarsal joints.

See Also

• Metatarsal bones
• Foot
• Synovial joint
• Ligament

References

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