muscles of the extremities
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Muscles of the Extremities. Justin R. Stone AH 129 Tortora : Ch 11. Muscles: Intrinsic Hand Muscles. Upper Extremity Adductor Pollicis Abductor Pollicis Brevis Opponens Pollicis Flexor Pollicis Brevis Abductor Digiti Minimi Flexor Digiti Minimi Brevis Lumbricals Palmar Interossei - PowerPoint PPT PresentationTRANSCRIPT
Muscles of the Extremities
Justin R. StoneAH 129
Tortora: Ch 11
Muscles:Intrinsic Hand Muscles
Upper ExtremityAdductor PollicisAbductor Pollicis BrevisOpponens PollicisFlexor Pollicis BrevisAbductor Digiti MinimiFlexor Digiti Minimi BrevisLumbricalsPalmar InterosseiDorsal Interossei
Muscles:Intrinsic Hand Muscles: THUMB
Upper Extremity: Intrinsic Hand Muscles: THUMB
Adductor PollicisAbductor Pollicis BrevisOpponens PollicisFlexor Pollicis Brevis
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
Adductor Pollicis
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
Abductor Pollicis
Brevis
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)
Opponens Pollicis
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
Flexor Pollicis
Brevis
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
Muscles:Intrinsic Hand Muscles: 5th FINGER
Upper Extremity: Intrinsic Hand Muscles: 5th FINGER
Abductor Digiti MinimiFlexor Digiti Minimi Brevis
Opponens Digiti Minimi
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
Abductor Digiti Minimi
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
Flexor Digiti Minimi (Brevis)
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)
Opponens Digiti
Minimi
Opponens Digiti
Minimi
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
Muscles:Intrinsic Hand Muscles
Upper Extremity: Intrinsic Hand Muscles
LumbricalsPalmar InterosseiDorsal Interossei
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
Lumbrica
ls
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
Palmar Interossei
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
Dorsal Interossei
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