Learn Extremity 1 Muscles by StudyGallery.com

Extremity 1

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Flexor Digiti Minimi Brevis Hand

O: Hook of hamate and flexor retinaculum
I: Medial side of base of proximal phalanx of little finger
A: Flexes proximal phalanx of little (5th) finger
Wikipedia Questions

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Flexor Digitorum Profundus
Profundus for deep

O: Top of ulna
I: Base of the distal phalanx of digits 2 - 5
A: Flexes distal phalanges at distal interphalangeal joints of medial four digits; assists with flexion of hand
Wikipedia Questions

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Flexor Digitorum Superficialis

O: Humerus ulna head
I: Bodies of middle phalanges of digits 2 - 5
A: Flexes middle phalanges at proximal interphalangeal joints of medial four digits; acting more strongly, it also flexes proximal phalanges at metacarpophalangeal joints and hand
Wikipedia Questions

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Flexor Pollicis Brevis

O: Flexor retinaculum, scaphoid and trapezium
I: Lateral side of base of proximal phalanx of thumb
A: Flexes thumb
Wikipedia Questions

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Flexor Pollicis Longus

O: Front radius surface
I: Base of distal phalanx of thumb
A: Flexes phalanges of 1st digit (thumb)
Wikipedia Questions

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Iliacus

O: Ilium
I: Lesser trochanter
A: Flex the torso and thigh with respect to each other
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Inferior Gemellus

O:
I: Medial surface of greater trochanter of femur, in common with obturator internus
A: Rotates the thigh laterally; also helps abduct the flexed thigh Questions

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Infraspinatus

O: Scapula
I: Middle facet on greater tuberosity of humerus
A: Laterally rotate arm; helps to hold humeral head in glenoid cavity of scapula
Wikipedia Questions

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Interosseous Muscles, Dorsal

O:
I:
A: Questions

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Interosseous Muscles, Palmar

O:
I:
A: Questions

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Latissimus Dorsi

O: Spine and thoracic vertebrae
I: Floor of intertubercular groove of humerus
A: Extends, adducts, and medially rotates humerus; raises body toward arms during climbing
Wikipedia Questions

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Levator Scapulae

O: Back of C1 - C4 vertebrae
I: Superior part of medial border of scapula
A: Elevates scapula and tilts its glenoid cavity inferiorly by rotating scapula
Wikipedia Questions

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Obturator Externus

O:
I: Posteromedial surface of greater trochanter of femur
A: Rotates the thigh laterally; also helps adduct thigh Questions

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Obturator Internus

O:
I: Medial surface of greater trochanter of femur, in common with superior and inferior gemelli
A: Rotates the thigh laterally; also helps abduct the thigh when it is flexed Questions

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Pectineus

O: Pelvis pubic
I: Pectineal line of femur
A: Adducts the thigh and flexes the hip joint
Wikipedia Questions

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Peroneus Tertius

O:
I: Dorsal surface of the base of the fifth metatarsal
A: Works with the extensor digitorum longus to dorsiflex, evert and abduct the foot
Wikipedia Questions

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Piriformis

O:
I: Superior border of greater trochanter
A: Lateral rotator of the hip joint; also helps abduct the hip if it is flexed Questions

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Plantaris

O: Base of femur
I: Middle 1/3 of the posterior calcaneal surface, just medial to Achilles tendon
A: Plantar flexor of ankle; also flexes knee Questions