Download - Muscles of the Extremities
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Muscles of the Extremities
Justin R. StoneAH 129
Tortora: Ch 11
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Muscles:Intrinsic Hand Muscles
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Upper ExtremityAdductor PollicisAbductor Pollicis BrevisOpponens PollicisFlexor Pollicis BrevisAbductor Digiti MinimiFlexor Digiti Minimi BrevisLumbricalsPalmar InterosseiDorsal Interossei
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Muscles:Intrinsic Hand Muscles: THUMB
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Upper Extremity: Intrinsic Hand Muscles: THUMB
Adductor PollicisAbductor Pollicis BrevisOpponens PollicisFlexor Pollicis Brevis
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Upper Extremity:Intrinsic Hand Muscles: THUMB
Adductor Pollicis◦O/I:
O: Oblique Head: Capitate and 2nd-3rd Metacarpals O: Transverse Head: 3rd Metacarpal I: Medial aspect of proximal phalynx of thumb
(CONTAINS SESMOID)◦N: Ulnar◦A: Adducts Thumb at CMC and MCP
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Adductor Pollicis
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Upper Extremity:Intrinsic Hand Muscles: THUMB
Abductor Pollicis Brevis◦O/I:
O: Flexor retinaculum, scaphoid, trapezium I: Lateral aspect of 1st proximal phalynx
◦N: Median◦A: Abducts thumb at CMC
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Abductor Pollicis
Brevis
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Upper Extremity:Intrinsic Hand Muscles: THUMB
Opponens Pollicis◦O/I:
O: Flexor Retinaculum, Trapezium I: Lateral aspect of 1st Metacarpal
◦N: Median◦A: Opposition (Moves thumb to meet tip of 5th finger at CMC)
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Opponens Pollicis
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Upper Extremity:Intrinsic Hand Muscles: THUMB
Flexor Pollicis Brevis◦O/I:
O: Flexor Retinaculum, Trapezium, Trapezoid, Capitate
I: Lateral aspect of 1st proximal phalynx◦N: Median and Ulnar◦Flex Thumb at CMC and MCP
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Flexor Pollicis
Brevis
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Upper Extremity: Intrinsic Hand MusclesTHUMB
Lab: Intrinsic Hand Muscles: Thumb◦Color: Netter’s◦Color: Sieg and Adams p.46-49 ◦Flashcards◦Palpate: O/I of Intrinsic Hand Muscles of the
Thumb and Palpate muscle while performing Action
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Muscles:Intrinsic Hand Muscles: 5th FINGER
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Upper Extremity: Intrinsic Hand Muscles: 5th FINGER
Abductor Digiti MinimiFlexor Digiti Minimi Brevis
Opponens Digiti Minimi
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Upper Extremity:Intrinsic Hand Muscles: 5th FINGER
Abductor Digiti Minimi◦O/I:
O: Pisiform, tendon of flexor carpi ulnaris I: Medial aspect of 5th proximal phalanx
◦N: Ulnar◦A: Abducts and Flexes 5th finger at MCP
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Abductor Digiti Minimi
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Upper Extremity:Intrinsic Hand Muscles: 5th FINGER
Flexor Digiti Minimi (Brevis)◦O/I:
O:Flexor retinaculum, hamate I: Medial aspect of 5th proximal phalanx
◦N: Ulnar◦A: Flexes 5th finger at CMC and MCP
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Flexor Digiti Minimi (Brevis)
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Upper Extremity:Intrinsic Hand Muscles: 5th FINGER
Opponens Digiti Minimi◦O/I:
O: Flexor retinaculum, hamate I: Medial aspect of 5th metacarpal
◦N: Ulnar◦A: Opposition (moves 5th finger at CMC across palm to meet tip of 1st finger)
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Opponens Digiti
Minimi
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Opponens Digiti
Minimi
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Upper Extremity: Intrinsic Hand Muscles 5th FINGER
Lab: Intrinsic Hand Muscles: 5th Finger◦Color: Netter’s◦Color: Sieg and Adams p.50-52◦Flashcards◦Palpate: O/I of Intrinsic Hand Muscles of the 5th
Finger and Palpate muscle while performing Action
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Muscles:Intrinsic Hand Muscles
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Upper Extremity: Intrinsic Hand Muscles
LumbricalsPalmar InterosseiDorsal Interossei
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Upper Extremity:Intrinsic Hand Muscles
Lumbricals: 4◦O/I:
O: Flexor Digitorum Profundus Tendons I: Extensor Expansion of Dorsal Hand (Aponeurosis
of Tendons of Extensor Digitorum Muscles)◦N: Median and Ulnar◦A: Allow Flexion at MCP while maintaining Extension at IP
**2 Unipennate, 2 Bipennate
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Lumbrica
ls
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Upper Extremity:Intrinsic Hand Muscles
Palmar Interossie: 3◦O/I:
O: Palmar Aspect of Shaft of 2nd, 4th, and 5th Metacarpals
I: Base of Proximal Phalanges and Extensor Expansion of 2nd, 4th, and 5th Metacarpals
◦N: Ulnar◦A:
Adduct 2nd, 4th, and 5th Fingers (PAD) Assist in Flexion of 2nd, 4th, and 5th Fingers
**Unipennate
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Palmar Interossei
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Upper Extremity:Intrinsic Hand Muscles
Dorsal Interossei: 4◦O/I:
O: Each has 2 heads, Arising from Dorsal Surfaces of Adjacent Metacarpals
I: Extensor Expansion and Proximal Base of 2nd, 3rd, and 4th Phalanges
◦N: Ulnar◦A:
Abducts 2nd, 3rd, and 4th fingers (DAB) Assists in Flexion of 2nd, 3rd, and 4th fingers Assists in Extension of all fingers
**Bipennate
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Dorsal Interossei
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Upper Extremity: Intrinsic Hand Muscles
Lab: Intrinsic Hand Muscles◦Color: Netter’s◦Color: Sieg and Adams p.53-55◦Flashcards◦Palpate: O/I of Intrinsic Hand Muscles and
Palpate muscle while performing Action