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Nov 13, 2023 · The heads of the middle phalanges have a pulley-like appearance. 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 ...
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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...
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May 20, 2021 · The median nerve is responsible for the movement of the thenar eminence muscles and the rest of the lumbricals. It is also responsible for the perception of skin sensations on the palm, thumb, index finger, and middle finger, as well as sensations on the side of the ring finger closest to the middle finger.
- 2021/05/20
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. Proximal region of the hand is the carpus (wrist) The middle region the metacarpus (palm)
Its pectoral fin is the precursor of our hand, which has 4 fingers, each with 3 phalanges, and a thumb with only 2 phalanges. It is known that almost without exception, the first ray of mammals, reptiles and amphibians, and humans had 2 phalanges. Galen (AD 165) thought the bones of the thumb were really 3 phalanges and that it lacked a metacarpal.
- Adrian E. Flatt
- 2002/10
- 10.1080/08998280.2002.11927870
Dec 5, 2016 · The hand has 14 phalanges. The phalanges within each finger are referred to as proximal, middle, and distal (see Figure 7-4). The thumb has only a proximal and a distal phalanx. Except for differences in size, all phalanges within a particular digit have similar morphology (see Figure 7-3).
The long finger bones are known as phalanges (singular = phalanx). While the thumb (pollex) only has distal and proximal phalanges, the other fingers have distal, middle and proximal phalanges. The middle and proximal phalanges have a base (proximal), body, and head (distal).
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