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Intrinsic Hand Muscles
Hand Interossei
Dorsal Interossei
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Created by
Hiri P
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Cards (6)
Dorsal Interossei:
4 bipennate
muscles
O (origin):
Sides
of
adjacent metacarpals
A)
Dorsal Interossei
1
R (direction):
Distally
A)
Dorsal Interossei
1
I (insertion):
Dorsal digital expansions
and
bases
of
proximal phalanges
of digits
2
–
4
A)
Dorsal Interossei
1
A (action):
Abduction
and
flexion
of
metacarpophalangeal
joints of digits
2
-
4
Extension
of
interphalangeal
joints (through
dorsal digital expansion
)
A)
Dorsal Interossei
1
NS (nerve supply):
Deep
branch
ulnar
nerve (
C7
-
T1
)
A)
Dorsal Interossei
1