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- They articulate with the bases of the distal phalanges to form the distal interphalangeal (DIP) joints of hand. The middle phalanges are reinforced by the same ligaments supporting the proximal ones; digital fascial complex, collateral interphalangeal ligaments and extensor expansion of hand.
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Nov 13, 2023 · The collateral interphalangeal ligaments attach to the base and heads of the middle phalanges to reinforce the PIP and DIP joints. The middle phalanges are less mobile compared to the proximal phalanges. They are only capable of flexion and extension at the PIP joints.
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- 6 min
- Nutrient rami from palmar digital arteries
Oct 30, 2023 · 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 interphalangeal joint (DIPJ or DIJ) is found between the middle and distal phalanges.
- Medical Content
- Synovial hinge joint; uniaxial
- Proper palmar digital nerves
A good example is the elbow joint, with the articulation between the trochlea of the humerus and the trochlear notch of the ulna. Other hinge joints of the body include the knee, ankle, and interphalangeal joints between the phalanges of the fingers and toes. Condyloid Joint
- Lindsay M. Biga, Sierra Dawson, Amy Harwell, Robin Hopkins, Joel Kaufmann, Mike LeMaster, Philip Mat...
- 2019
- Overview
- Development
- Structure
- Function
- Clinical significance
A middle phalanx (plural: phalanges) is one of the tubular long bones found in the fingers [1, 2]. It may also be referred to as a medial phalanx or intermediate phalanx. Like the rest of the phalanges, each middle phalanx has a head, body/shaft, and a base.
The primary ossification center for the body of the middle phalanx appears quite early, around 8th-9th week of fetal development. There is another, a secondary center for the base, which starts to develop around 4-5 years of age. The ossification centers unite when one is 18-20 years old [5].
Proximal Interphalangeal (PIP) Joints (between the middle and proximal phalanges in each finger [6]) The base of each middle phalanx has two concave facets, with a smooth ridge separating them, for articulating with the head of the proximal phalanx [7]. This joint is marked by the second crease in each finger when you move down from the tip or fin...
Four flexor digitorum superficialis tendons, along with the flexor sheath, are attached to the middle phalanges at their sides [8]. These help with the flexion of the middle phalanges at the PIP joints. At the base of their dorsal aspect, these phalanges receive the extensor digitorum tendons [7], which help with the extension and separation of the...
Fracture and Dislocation: Middle phalanx fractures and dislocations are not as common as those of the proximal phalanx [11]. These may occur most commonly from sports injuries, but may also be caused by some other trauma or accident. Arthritis: The PIP and DIP joint arthritis are associated with this bone, with the index finger joints being more pr...
Highlights. 2:46. Proximal phalanges. 4:32. Middle phalanges. 5:11. Distal phalanges. Phalanges of the hand and related bony landmarks. Watch the video tutorial now.
Dec 20, 2023 · The proximal interphalangeal joint (PIPJ) refers to the articulation between the proximal and middle phalanx in the hand. It is present in all digits except the thumb. It is a synovial hinge joint which permits flexion and extension in center of the fingers, contributing to fine motor control.
the metacarpals – the five bones that comprise the middle part of the hand. the phalanges (singular phalanx) – the 14 narrow bones that make up the fingers of each hand. Each finger has three phalanges (the distal, middle, and proximal); the thumb has two. The hand is divided into three regions [6] Proximal region of the hand is the carpus (wrist)
