Extensor expansion
An extensor expansion (extensor hood, dorsal expansion, dorsal hood, dorsal aponeurosis) is the special connective attachments by which the extensor tendons insert into the phalanges.
| Extensor expansion | |
|---|---|
Extensor expansion covers the tendon of extensor digitorum tendons over the proximal phalanges | |
| TA2 | 2502 |
| Anatomical terminology | |
These flattened tendons (aponeurosis) of extensor muscles span the proximal and middle phalanges.
At the distal end of the metacarpal, the extensor tendon will expand to form a hood, which covers the back and sides of the head of the metacarpal and the proximal phalanx.
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