Interphalangeal joints of the foot

Interphalangeal joints of the foot are the hinge joints located between the phalanges (bones) of the human foot. There are two types of interphalangeal joints in the foot: the proximal interphalangeal joints (PIP) and the distal interphalangeal joints (DIP).

Etymology

The term "interphalangeal" comes from the Latin words "inter" meaning between, and "phalanges" referring to the bones of the fingers or toes.

Anatomy

The interphalangeal joints of the foot are similar to those in the hand. They are synovial joints, which means they are surrounded by a fibrous capsule lined by synovium and have a joint cavity filled with synovial fluid. The bones involved in these joints are the phalanges, which are the bones of the toes. Each toe, except the big toe, has three phalanges and two interphalangeal joints, while the big toe has two phalanges and one interphalangeal joint.

Proximal Interphalangeal Joints

The proximal interphalangeal joints (PIP) are the joints in the foot located closest to the ankle. They are formed by the connection of the proximal and middle phalanges.

Distal Interphalangeal Joints

The distal interphalangeal joints (DIP) are the joints in the foot located closest to the tip of the toes. They are formed by the connection of the middle and distal phalanges.

Function

The interphalangeal joints of the foot allow for flexion and extension movements, which are essential for walking, running, and other activities involving the feet.

Related Terms

• Phalanges
• Synovial joint
• Hinge joint
• Flexion
• Extension

See Also

• Interphalangeal joints of the hand
• Metatarsophalangeal joints

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