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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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Feb 16, 2021 · While the metacarpophalangeal joints at the base of the fingers are the only ones that form lexical boundaries (at least in English), there are two additional joints in each of the four fingers (i.e., the proximal and distal interphalangeal joints) and one interphalangeal joint in the thumb (Lewis 1989; Owen 1849/2007). To our knowledge, no ...
- Kasia A. Myga, Klaudia B. Ambroziak, Luigi Tamè, Luigi Tamè, Alessandro Farnè, Matthew R. Longo
- 2021
The brainstem is the lower extension of the brain, located in front of the cerebellum and connected to the spinal cord. It consists of three structures: the midbrain, pons and medulla oblongata. It serves as a relay station, passing messages back and forth between various parts of the body and the cerebral cortex.
Nov 13, 2023 · The phalanges are interconnected by interphalangeal joints and vascularized via the nutrient rami to phalanges, which stem from the palmar digital arteries. The digits have a universal labeling system using the anatomical position of the hand (palm facing anteriorly) as reference.
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. [1] Anatomy. There are two sets in each finger (except in the thumb, which has only one joint) Proximal interphalangeal joints" (PIJ or PIPJ), those between the first (also called proximal)
