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48 Cards in this Set
- Front
- Back
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What are the muscles of the thenar group (thumb side)?
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- abductor pollicis brevis
- flexor pollicis brevis - opponens pollicis - adductor pollicis |
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Abductor pollicis brevis
O & I |
O:
1) flexor retinaculum 2) tubercles of scaphoid and trapezium I: lateral base of proximal phalanx of thumb |
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Abductor pollicis brevis
Innervation |
median
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Abductor pollicis brevis
Vasculature |
radial
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Abductor pollicis brevis
Main Action |
abducts thumb
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Flexor pollicis brevis (FPB)
O & I |
O:
1) flexor retinaculum 2) tubercles of trapezium I: base of proximal phalanx of thumb |
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Flexor pollicis brevis (FPB)
Innervation |
median
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Flexor pollicis brevis (FPB)
Vasculature |
radial
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Flexor pollicis brevis (FPB)
Main Action |
flexes thumb
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Opponens pollicis
O & I |
O:
1) flexor retinaculum 2) tubercles of scaphoid and trapezium I: lateral MC 1 |
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Opponens pollicis
Innervation |
median
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Opponens pollicis
Vasculature |
radial
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Opponens pollicis
Main Action |
oppose thumb
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Adductor pollicis
O & I |
O:
oblique head - base MC 2-3, capitate and adjacent carpals transverse head - anterior body MC3 I: medial base proximal phalanx of thumb |
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Adductor pollicis
Innervation |
ulnar
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Adductor pollicis
Vasculature |
radial
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Adductor pollicis
Main Action |
adducts thumb
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Name the muscles of the hypothenar group
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- abductor digiti minimi
- flexor digiti minimi - opponens digiti minimi |
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Abductor digiti minimi
O & I |
O: pisiform
I: medial base of proximal phalanx of digit 5 |
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Abductor digiti minimi
Innervation |
ulnar
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Abductor digiti minimi
Vasculature |
ulnar
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Abductor digiti minimi
Main Action |
abducts digit 5
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Flexor digiti minimi
O & I |
O:
1) hook of hamate 2) flexor retinaculum I: medial base of proximal phalanx of digit 5 |
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Flexor digiti minimi
Innervation |
ulnar
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Flexor digiti minimi
Vasculature |
ulnar
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Flexor digiti minimi
Main Action |
flexes digit 5
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Opponens digiti minimi
O & I |
O:
1) hook of hamate 2) flexor retinaculum I: medial MC 5 |
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Opponens digiti minimi
Innervation |
ulnar
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Opponens digiti minimi
Vasculature |
ulnar
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Opponens digiti minimi
Main Action |
opposes digit 5
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Name the short muscles
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- lumbricals 1-4
- dorsal interossei - palmar interossei |
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Lumbricals 1 and 2
O & I |
O: lateral 2 tendons of FDP
I: lateral side of external expansion of digits 2-3 |
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Lumbricals 1 and 2
Innervation |
median
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Lumbricals 1 and 2
Vasculature |
palmar MC of deep palmar arch
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Lumbricals 1 and 2
Main Action |
flexes at MCP joint
extends at IP joint |
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Lumbricals 3 and 4
O & I |
O: medial 3 tendons of FDP
I: lateral side of external expansion of digits 3-4 |
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Lumbricals 3 and 4
Innervation |
ulnar
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Lumbricals 3 and 4
Vasculature |
palmar MC of deep palmar arch
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Lumbricals 3 and 4
Main Action |
flexes at MCP joint
extends at IP joint |
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Dorsal interossei 1-4
O & I |
O: adjacent sides of 2 MC
I: external expansion and base of proximal phalanges of digits 2-4 |
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Dorsal interossei 1-4
Innervation |
ulnar
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Dorsal interossei 1-4
Vasculature |
palmar MC of deep palmar arch
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Dorsal interossei 1-4
Main Action |
abducts digits 2-3-4
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Palmar interossei 1-3
O & I |
O: palmar MC 2-4-5
I: external expansion and base of proximal phalanges of digits 2-4-5 |
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Palmar interossei 1-3
Innervation |
ulnar
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Palmar interossei 1-3
Vasculature |
palmar MC of deep palmar arch
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Palmar interossei 1-3
Main Action |
adducts digits 2-4-5
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Whats the difference between extrinsic and intrinsic hand muscles?
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extrinsic - originate outside of hand, insert in hand
intrinsic - originate and insert inside hand |
