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Musculoskeletal Anatomy > Muscles of shoulder, back, arm and forearm > Flashcards

Muscles of shoulder, back, arm and forearm Flashcards

0
Q

Latissimus dorsi

A

O: Medial creat of sacrum, iliac crest, spines of T6-L5
I: Intertubercular groove of humerus
A: Extends, adducts, medially rotates humerus
N: Thoracodorsal nerve

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1
Q

Trapezius

A

O: Superior nuchal line, external occipital protuberance, nuchal ligament, spinous processes of C7-T12
I: Spine of scapula, acromion, lateral 1/3 of clavicle
A: Depress, elevate, retract and lateral rotation of scapula
N: Accessory nerve

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2
Q

Levator scapulae

A

O: Transverse processes of C1-C4
I: Medial border of scapula, above the spine
A: Elevates, retract and medially rotate scapula
N: Dorsal scapular nerve

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3
Q

Rhomboid minor

A

O: Spinous processes of C7 & T1
I: Medial border of scapula, at level of the spine
A: Elevate, retract & medially rotate scapula
N: Dorsal scapular nerve

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4
Q

Rhomboid major

A

O: Spinous processes of T2-T5
I: Medial border of scapula, below level of spine
A: Elevate, retract and medially rotate scapula
N: Dorsal scapular nerve

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5
Q

Deltoid

A

O: Posterior deltoid- spine of scapula
Medial deltoid- acromion
Anterior deltoid- lateral 1/3 of clavicle
I: Deltoid tuberosity
A: all abduct the shoulder, posterior fibers laterally rotate and extend, anterior fibers medially rotate and flex humerus
N: Axillary nerve

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6
Q

Supraspinatus

A

O: Supraspinous fossa
I: Greater tubercle of humerus
A: Abducts humerus (with deltoid)
N: Suprascapular nerve

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7
Q

Infraspinatus

A

O: Infraspinous fossa
I: Greater tubercle
A: Laterally rotates humerus
N: Suprascapular nerve

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8
Q

Teres minor

A

O: Lateral border of scapula
I: Greater tubercle of humerus
A: Laterally rotates humerus
N: Axillary nerve

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9
Q

Subscapularis

A

O: Subscapular fossa
I: Lesser tubercle
A: Medially rotates scapula
N: Upper & lower subscapular nerve

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10
Q

Teres major

A

O: Lateral border of scapula
I: Intertubercular groove
A: Adduct, medially rotate and extend humerus
N: Lower subscapular nerve

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11
Q

Pectoralis major

A

O: Medial 1/2 of clavicle, sternum, upper 6 costal cartilages
I: Bicipital groove (humerus)
A: Medially rotate, adduct, flex the humerus
N: Lateral and medial pectoral nerve

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12
Q

Pectoralis minor

A

O: Ribs 3, 4, 5
I: Coracoid process of scapula
A: Depresses, protracts & medially rotates scapula
N: Medial pectoral nerve

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13
Q

Subclavius

A

O: 1st costal cartilage
I: Inferior groove of clavicle
A: Depresses and stabilizes clavicle
N: Nerve to subclavius

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14
Q

Serratus anterior

A

O: Upper 8 ribs
I: Vertebral (medial) border of scapula
A: Protracts, laterally rotates the scapula
N: Long thoracic nerve

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15
Q

Biceps brachii

A

O: Long head- supraglenoid tubercle
Short head- coracoid process
I: Radial ruberosity, bicipital aponeurosis
A: Flexes & supinates forearm, pronates a little
N: Musculocutaneous nerve

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16
Q

Brachialis

A

O: Lower 1/2 of humerus
I: Coronoid process of ulna
A: Flex forearm
N: Musculocutaneous & radial nerves

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17
Q

Coracobrachialis

A

O: Coracoid process of ulna
I: Middle 1/3 of humerus
A: Flex and adduct arm
N: Musculocutaneous nerve

18
Q

Triceps

A

O: Lateral head- posterior humerus (superior/lateral to radial groove)
Long head- infraglenoid tubercle
Medial head- posterior humerus (inferior/medial to radial groove)
I: Olecranon process of ulna
A: Extend arm and forearm
N: Radial nerve

19
Q

Anterior, superficial group

A

Pronator teres
Palmaris longus
Flexor carpi radialis
Flexor carpi ulnaris

20
Q

Anterior, intermediate group

A

Flexor digitorum superificialis

21
Q

Anterior, deep layer

A

Flexor digitorum profundus
Flexor pollicis longus
Pronator quadratus

22
Q

Pronator teres

A

O: Common flexor origin
I: Radius
A: Pronates forearm
N: Median nerve

23
Q

Palmaris longus

A

O: Common flexor origin
I: Palmar aponeurosis
A: Flexes and tenses palmar aponeurosis
N: Median nerve

24
Q

Flexor carpi radialis

A

O: Common flexor origin
I: Metacarpals 2, 3
A: Flexes and radially deviates wrist
N: Median nerve

25
Q

Flexor carpi ulnaris

A

O: Common flexor origin
I: Metacarpal 5
A: Flexes and ulnar deviates wrist
N: Ulnar nerve

26
Q

Flexor digitorum superficialis

A

O: Common flexor origin
I: Middle phalanges of 4 fingers
A: Flexes fingers
N: Median nerve

27
Q

Flexor digitorum profundus

A

O: Radius and ulna
I: Distal phalanges
A: Flexes distal phalanges 4 & 5
N: Median nerve to radial half, ulnar nerve to ulnar half

28
Q

Flexor pollicis longus

A

O: Common flexor origin
I: Distal phalanx of thumb
A: Flexes phalanges of 1st digit
N: Median nerve

29
Q

Pronator quadratus

A

O: Medial, anterior surface of ulna
I: Lateral, anterior surface of radius
A: Pronates forearm
N: Median nerve

30
Q

Posterior, superficial group

A 
Brachioradialis
Extensor carpi radialis longus
Extensor carpi radialis brevis
Extensor digitorum 
Extensor digiti minimi
Extensor carpi ulnaris
31
Q

Posterior, deep group

A

Supinator
Abductor pollicis longus
Extensor pollicis longus
Extensor pollicis brevis

32
Q

Brachioradialis

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Radius
A: Flexes elbow and maintains half pronated position
N: Radial nerve

33
Q

Extensor carpi radialis longus

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Metacarpals 2, 3
A: Extend and radially deviates wrist
N: Radial nerve

34
Q

Extensor carpi radialis brevis

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Metacarpals 2, 3
A: Extend and radially deviates wrist
N: Radial nerve

35
Q

Extensor digitorum

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Extensor expansions over middle and distal phalanges
A: Extends fingers
N: Radial nerve

36
Q

Extensor digiti minimi

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Extensor expansions over middle and distal phalanges
A: Extends fingers
N: Radial nerve

37
Q

Extensor carpi ulnaris

A

O: Common extensor origin or (lateral) supracondylar ridge
I: Metacarpal 5
A: Extend wrist and ulnar deviates
N: Radial nerve

38
Q

Supinator

A

O: Supinator crest of ulna, lateral epicondyle of humerus, radial collateral and annular ligaments
I: Lateral surface of proximal radius
A: Supinates forearm
N: Radial nerve

39
Q

Abductor pollicis longus

A

O: Posterior surface of middle third of ulna, radius and interosseous membrane
I: Base of first metacarpal (thumb)
A: Abducts and extends thumb, abducts the wrist
N: Radial nerve

40
Q

Extensor pollicis longus

A

O: Proximal surface of middle third ulna and interosseus membrane
I: Base of distal phalanx of thumb
A: Extends distal phalanx of thumb
N: Radial nerve

41
Q

Extensor pollicis brevis

A

O: Posterior surface of radius & interosseus membrane
I: Base of proximal phalanx of thumb
A: Extends proximal phalanx of thumb
N: Radial nerve

42
Q

Extensor indicis

A

O: Proximal surface of ulna and interosseus membrane
I: Extensor expansion of second digit
A: Extends 2nd digit, helps extend hand at wrist
N: Radial nerve

43
Q

Anatomical snuffbox

A

Space between tendons of extensor pollicis longus, extensor pollicis brevis, abductor pollicis longus

Musculoskeletal Anatomy (9 decks)

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