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brau2308
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Flexor digitorum profundus
Origin:
anterior, middle ulna
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Flexor digitorum profundus
Insertion:
4 tendons run into bases of distal phalanges
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Flexor digitorum profundus
Action:
flexes following joints in fingers 2 (index)-5 (little): wrist, MP, PIP, and DIP
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Flexor digitorum profundus
Innervation:
- index and middle- Median
- ring and little- Ulnar
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Flexor digitorum superficialis
Origin:
common flexor tendon from medial epicondyle of humerus
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Flexor digitorum superficialis
Insertion:
sides of middle phalanges of the 4 fingers (not thumb)
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Flexor digitorum superficialis
Action:
flexes wrist and MP, PIP joints in fingers (not thumb)
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Flexor digitorum superficialis
Innervation:
median
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Extensor digitorum
Origin:
lateral epicondyle of humerus
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Extensor digitorum
Insertion:
extensor expansions of 4 digits and specifically into base of proximal phalanx
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Extensor digitorum
Action:
extend wrist and 4 fingers at MP joints; ext PIP and DIP joints
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Extensor digitorum
Innervation:
radial
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Lumbricales
Origin:
tendons of flexor digitorum profundus
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Lumbricales
Insertion:
radial border of extensor expansions of 2-5th digits
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Lumbricales
Action:
flex MP joints, extends PIP and DIP joints of fingers (not thumb)
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Palmar interossei
Origin:
ulnar side of 1, 2, 4, 5th metacarpals
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Palmar interossei
Insertion:
extensor expansions of 2, 4, 5 digits and bases of proximal phalanges
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Palmar interossei
Action:
adduct thumb, index, ring, and little fingers toward the axial line; assists w/ PIP and DIP joint extension
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Palmar interossei
Innervation:
ulnar
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Dorsal interossei
Origin:
adjacent sides of 2 metacarpals
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Dorsal interossei
Insertion:
bases of proximal phalanges extensor expansions of 2nd-4th digits
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Dorsal interossei
Action:
abduct 2nd-4th digits; assist with PIP and DIP joint extension
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Dorsal interossei
Innervation:
ulnar
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Abductor pollicis longus
Origin:
posterior surface of proximal ulna and radius
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Abductor pollicis longus
Insertion:
base of 1st metacarpal (radial side)
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Abductor pollicis longus
Action:
abducts and extends CMC joint of thumb, abducts (radially deviates) and flexes wrist
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Abductor pollicis longus
Innervation:
radial
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