Extensor expansion | |
---|---|
TA2 | 2502 |
Anatomical terminology |
An extensor expansion (extensor hood, [1] dorsal expansion, dorsal hood, dorsal aponeurosis[ citation needed]) is the special connective attachments by which the extensor tendons insert into the phalanges.
These flattened tendons ( aponeurosis) of extensor muscles span the proximal and middle phalanges. [2]
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.
The expansion soon divides into three bands:
The extensor expansion allows for contractile forces from the extensor compartment muscles to be transferred to the phalanges. It also balances the forces across the phalanges. [1]
Extensor expansion | |
---|---|
TA2 | 2502 |
Anatomical terminology |
An extensor expansion (extensor hood, [1] dorsal expansion, dorsal hood, dorsal aponeurosis[ citation needed]) is the special connective attachments by which the extensor tendons insert into the phalanges.
These flattened tendons ( aponeurosis) of extensor muscles span the proximal and middle phalanges. [2]
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.
The expansion soon divides into three bands:
The extensor expansion allows for contractile forces from the extensor compartment muscles to be transferred to the phalanges. It also balances the forces across the phalanges. [1]