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Oct 30, 2023 · The interphalangeal joints of the hand are synovial hinge joints that span between the proximal, middle, and distal phalanges of the hand. In digits 2-5 these joints can be further classified based on which bones are involved. The proximal interphalangeal joint (PIPJ or PIJ) is located between the proximal and middle phalanges, while the distal ...
- Articulating Surfaces
- Joint Capsule
- Ligaments
The proximal interphalangeal jointis formed by the articulation between the head of the proximal phalanx and the base of the middle phalanx: 1. Head of the proximal phalanx– formed by two curved condylar processes, which form a shallow groove in the middle. 2. Base of the middle phalanx– formed by two opposing concave sections which form a raised r...
Each proximal interphalangeal joint is surrounded by a small fibrous capsule. It is lined by a synovial membrane and filled with synovial fluid.
The proximal interphalangeal joint capsule is strengthenedby surrounding ligaments: 1. Proper and accessory collateral ligaments: 1.1. The collateral ligamentsare located on the radial and ulnar aspect of the joint. They prevent excessive adduction and abduction at the PIPJ. 1.2. They arise from the head of the proximal phalanx and pass volarly ont...
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What are the interphalangeal joints of the hand?
What are proximal and distal interphalangeal joints?
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How is the proximal interphalangeal joint formed?
The interphalangeal joints of the hand are the hinge joints between the phalanges of the fingers that provide flexion towards the palm of the hand . There are two sets in each finger (except in the thumb, which has only one joint): Anatomically, the proximal and distal interphalangeal joints are very similar. There are some minor differences in ...
Surrounding each interphalangeal joint is a fibrous joint capsule, the inner lining of which is comprised of a synovial membrane. Strengthening each joint capsule are two collateral ligaments and a palmar ligament, also known as a palmar/volar plate. Dorsally, the joint capsule is strengthened by a broadening of the extensor tendons.
Joints. The joints in our hands are made up of cartilage surfaces that cap the bones. Cartilage is a smooth surface that allows for gliding. When cartilage is healthy, there is a cushioning effect of the cartilage that absorbs and evens out the forces across the joint. Our joints typically have a capsule of tough, but flexible, fibrous tissue ...
Jan 7, 2024 · The carpal bone that connects to the thumb's MCP joint is the trapezium. Proximal interphalangeal joint (PIP): This is the joint in the middle of the finger, connecting the proximal and middle phalanges. Distal interphalangeal joint (DIP): This is the joint closest to your fingertip, connecting the middle and distal phalanges. The thumb does ...
