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Human Anatomy Exam #1 > Arm Muscles > Flashcards

Arm Muscles Flashcards

1
Q

Biceps brachii

A

O: Long head: supraglenoid tubercle of scapula; Short head: coracoid process of scapula
I: radial tuberosity, bicipital aponeurosis
N: Musculocutaneous n.
A: supination and flexion of forearm; flexion of arm (weakly)

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2
Q

Coracobrachialis

A

O: coracoid process of scapula
I: medial surface of mid-shaft of humerus
N: Musculocutaneous n.
A: flexion and adduction of arm

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3
Q

Brachialis

A

O: distal half of anterior humerus
I: coronoid process and tuberosity of ulna
N: Musculocutaneous n.
A: flexion of forearm

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4
Q

Pronator teres

A

O: medial epicondyle of humerus, coronoid process of ulna
I: lateral surface of radius
N: Median n.
A: pronation of forearm

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5
Q

Flexor carpi radialis (FCR)

A

O: medial epicondyle of humerus
I: base of 2nd metacarpal
N: Median n.
A: flexion and abduction of wrist

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6
Q

Palmaris longus

A

O: medial epicondyle of humerus
I: palmar aponeurosis
N: Median n.
A: flexion of wrist

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7
Q

Flexor digitorum superficialis (FDS)

A

O: medial epicondyle of humerus, coronoid process, shaft of radius
I: middle phalanges of digits 2-5
N: Median n.
A: flexion of PIP joints of digits 2-5

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8
Q

Flexor pollicis longus (FPL)

A

O: radius, interosseous membrane
I: distal phalanx of digit 1 (pollex/thumb)
N: Median n.
A: flexion of PIP and DIP joints of pollex

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9
Q

Flexor carpi ulnari (FCU)

A

O: medial epicondyle of humerus
I: pisiform, hook of hamate, base of 5th metacarpal
N: Ulnar n.
A: flexion and adduction of wrist

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10
Q

Flexor digitorum profundus (FDP)

A

O: ulna, interosseous membrane
I: distal phalanges of digits 2-5
N: Lateral: 1/2 of Median n.; Medial: 1/2 of Ulnar n.
A: flexion of DIP joints 2-5

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11
Q

Pronator quadratus

A

O: distal anterior ulna
I: distal anterior radius
N: Median n.
A: pronation of forearm

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12
Q

Triceps brachii

A

O: Long head: infraglenoid tubercle of scapula; Medial head: posterior humerus below radial groove; Short head: posterior humerus above radial groove
I: olecranon process of ulna
N: Radial n.
A: extension of forearm; Long head: extension of arm

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13
Q

Anconeus

A

O: lateral epicondyle of humerus
I: olecranon process/proximal ulna
N: Radial n.
A: accessory for extension of forearm

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14
Q

Brachioradialis

A

O: lateral supraepicondylar ridge of humerus
I: distal radius
N: Radial n.
A: flexion of forearm in mid-pronated position

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15
Q

Extensor carpi radialis longus

A

O: lateral supraepicondylar ridge of humerus
I: base of metacarpal 2
N: Radial n.
A: extension and abduction of wrist

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16
Q

Extensor carpi radialis brevis

A

O: lateral epicondyle of humerus
I: base of metacarpal 3
N: Radial n.
A: extension and abduction of wrist

17
Q

Extensor digitorum

A

O: lateral epicondyle of humerus
I: extensor expansions of digits 2-5
N: Radial n.
A: extension of wrist; extension of all joints of digits 2-5

18
Q

Extensor carpi ulnaris

A

O: lateral epicondyle of humerus, ulna
I: base of metacarpal 5
N: Radial n.
A: extension and adduction of wrist

19
Q

Supinator

A

O: lateral epicondyle of humerus, ulna
I: proximal radius
N: Radial n.
A: supination of forearm

20
Q

Abductor pollicis longus

A

O: ulna, radius, interosseous membrane
I: base of metacarpal 1
N: Radial n.
A: abduction of pollex

21
Q

Extensor pollicis brevis

A

O: radius, interosseous membrane
I: proximal phalanx of digit 1 (pollex)
N: Radial n.
A: extension of pollex

22
Q

Extensor polices longus

A

O: ulna, interosseous membrane
I: distal phalanx of digit 1 (pollex)
N: Radial n.
A: extension of pollex

23
Q

Extensor indicis

A

O: ulna, interosseous membrane
I: extensor expansion of digit 2
N: Radial n.
A: extension of digit 2; extension of wrist

24
Q

Extensor digiti minimi

A

O: lateral epicondyle of humerus
I: extensor expansion of digit 5
N: Radial n.
A: extension of wrist; extension of all joints of digit 5

25
Q

Abductor pollicis brevis

A

O: trapezium, scaphoid, flexor retinaculum
I: proximal phalanx of digit 1 (pollex)
N: Median n. (via recurrent branch)
A: abduction of pollex

26
Q

Flexor pollicis brevis (superficial head)

A

O: trapezium, scaphoid, flexor retinaculum
I: proximal phalanx of digit 1 (pollex)
N: Median n. (via recurrent branch)
A: flexion of pollex at MCP joint

27
Q

Opponens pollicis

A

O: trapezium, scaphoid, flexor retinaculum
I: metacarpal 1
N: Median n. (via recurrent branch)
A: opposition of pollex

28
Q

Flexor pollicis brevis (deep head)

A

O: trapezoid and capitate
I: proximal phalanx of digit 1 (pollex)
N: Ulnar n.
A: flexion of pollex at MCP joint

29
Q

Adductor pollicis

A

O: Transverse head: metacarpal 3; Oblique head: capitate and metacarpals 2 & 3
I: medial base of proximal phalanx of digit 1 (pollex)
N: Ulnar n.
A: adduction of pollex

30
Q

Abductor digiti minimi

A

O: pisiform
I: proximal phalanx of digit 5
N: Ulnar n.
A: abduction of digit 5

31
Q

Flexor digiti minimi

A

O: hook of hamate, flexor retinaculum
I: proximal phalanx of digit 5
N: Ulnar n.
A: flexion of MCP joint of digit 5

32
Q

Opponens digiti minimi

A

O: hook of hamate, flexor retinaculum
I: metacarpal 5
N: Ulnar n.
A: opposition of digit 5

33
Q

Lateral Lumbricals

A

Lumbricals 1 & 2
O: lateral two tendons of FDP (Flexor digitorum profundus)
I: extensor expansions of digits 2-5
N: Median n.
A: flexion of MCP joints of digits 2-5, extension of PIP and DIP joints of digits 2-5

34
Q

Medial Lumbricals

A

Lumbricals 3 & 4
O: medial three tendons of FDP (Flexor digitorum profundus)
I: extensor expansions of digits 2-5
N: Ulnar n.
A: flexion of MCP joints of digits 2-5, extension of PIP and DIP joints of digits 2-5

35
Q

Palmar interosseous

A

O: sides of metacarpals 2, 4, and 5
I: proximal phalanges, and extensor expansions of digits 2, 4 and 5
N: Ulnar n.
A: adduction of digits 2, 4 and 5 (PAD); assist in flexion of MCP joints and extension of PIP/DIP joints

36
Q

Dorsal interosseous

A

O: adjacent sides of two metacarpals
I: proximal phalanges, and extensor expansions of digits 2, 3 and 4
N: Ulnar n.
A: abduction of digits 2, 3 and 4 (DAB); assist in flexion of MCP joints and extension of PIP/DIP joints

Human Anatomy Exam #1 (4 decks)

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