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Anatomy > upper limb muscles (o,i,a) > Flashcards

upper limb muscles (o,i,a) Flashcards

(48 cards)

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1
Q

pec major

A

O: medial 2/3 clavicle, sternum, ribs 1-6
I: lateral lip of intertubercular groove of humerus
A: adduction and medial rotation of arm, flexion & extension

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2
Q

pec minor

A

O: ribs 3-5
I: coracoid process of scapula
A: depression of shoulder, downward rotation of scapula

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3
Q

sternocleidomastoid

A

O: sternum, medial 1/3 of clavicle
I: mastoid process
A: flexion of neck towards same side (ear to shoulder)
N: accessory nerve (CN XI)

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4
Q

subclavius

A

O: rib 1
I: underside of clavicle
A: depression of clavicle, maintains integrity of sternoclavicular joint

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5
Q

Trapezius

A

O: external occipital protuberance, ligamentum nuchae, spinous process C7-T12
I: spine of scapula, acromion, lateral 1/3 of clavicle
A: elevation, retraction, depression of scapula and upward rotation of glenoid cavity
N: accessory nerve (C3 and C4 sensory)

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6
Q

Lat dorsi

A

O: spinous process of T6-T12, all lumbar and sacral vertebrae, and posterior iliac crest
I: medial lip and floor of intertubercular groove of humerus
A: extension, adduction, medial rotation of arm

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7
Q

Levator scapulae

A

O: transverse process of upper C1-C4
I: superior angle and upper medial border of scapula
A: elevation of scapula
N: C3, C4, and dorsal scapular nerve

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8
Q

Rhomboid minor

A

O: lower ligamentum nuchae, spinous process C7 and T1
I: medial border of scapula at base of spine
A: elevation and retraction of scapula, downward rotation of glenoid cavity

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9
Q

Rhomboid major

A

O: spinous process of T2-T5
I: medial border of scapula, inferior to rhomboid minor
A: elevation and retraction of scapula, downward rotation of glenoid cavity

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10
Q

Serratus Anterior

A

O: ribs 1-8 on anterolateral thoracic wall
I: medial borders of scapula
A: protraction of scapula, upward rotation of glenoid cavity, hold medial border against thoracic wall

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11
Q

Deltoid

A

O: lateral 1/3 of clavicle, acromion, scapular spine
I: deltoid tuberosity of humerus
A: abduction, flexion and medial rotation, extension and lateral rotation

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12
Q

Supraspinatus

A

O: supraspinous fossa of scapula
I: greater tubercle of humerus
A: abduction

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13
Q

Infraspinatus

A

O: infraspinous fossa of scapula
I: greater tubercle of humerus inferior to supraspinatus
A: lateral rotation

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14
Q

Teres minor

A

O: upper 2/3 of lateral border of scapula
I: greater tubercle below infraspinatus
A: lateral rotation

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15
Q

Teres major

A

O: inferior angle of scapula
I: medial lip of intertubercular groove of humerus
A: adduction, medial rotation, and extension

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16
Q

Subscapularis

A

O: subscapular fossa of scapula
I: lesser tubercle and crest of humerus
A: medial rotation

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17
Q

Biceps brachi

A

O: tip of coracoid process (short), supraglenoid tubercle of scapula (long)
I: radial tuberosity and bicipital aponeurosis into fascia of forearm
A: flexion and supination of forearm, flexion at elbow

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18
Q

Coracobrachialis

A

O: coracoid process
I: anteromedial surface of mid humerus
A: flexion and adduction of arm

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19
Q

Brachialis

A

O: lower 1/2 anterior surface of humerus, intermuscular septa
I: ulnar tuberosity
A: flexion of forearm

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20
Q

Triceps Brachii

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A

O: infraglenoid tubercle of scapula (long), posterior humerus and lateral to groove of radial nerve&lateral intermuscular septa (lat), posterior humerus and medial to groove of radial nerve and both intermuscular septa (medial)
I: proximal end of olecranon of ulna
A: extension or forearm, and extension of arm

21
Q

Anconeus

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A

O: lateral epicondyle of humerus
I: lateral side of olecranon of ulna
A: extension of forearm, stabilizes elbow joint against flexion/supination/pronation

22
Q

Pronator Teres

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A

O: medial epicondyle of humerus, coronoid process of ulna
I: lateral midshaft of humerus
A: pronation of forearm and hand

23
Q

Palmaris longus

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A

O: medial epicondyle of humerus
I: palmar aponeurosis
A: flexion of hand

24
Q

Flexor carpi radialis

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A

O: medial epicondyle of humerus
I: base of 2nd metacarpal and possibly 3rd
A: flexion and radial deviation of hand

25
Flexor carpi ulnaris
O: medial epicondyle of humerus I: pisiform bone A: flexion and ulnar deviation of hand
26
flexor digitorum superficialis
O: medial epicondyle of humerus, medial aspect of coronoid process of ulna, proximal 1/2 of radius distal to radial tuberosity I: base of middle phalanx of each of 4 fingers A: flexion of middle phalanx of each 4 fingers, flexion of each proximal phalanx, and helps to flex hand
27
flexor digitorum profundus
O: anterior and medial proximal 2/3 ulna, interosseous membrane, aponeurosis of flexor carpi ulnaris I: distal phalanx of each of 4 fingers A: flexion of distal phalanx and middle/proximal phalanx of 4 fingers, aids in flexion of hand
28
flexor pollicis longus
O: anterior middle 1/2 radius, adjacent interosseous membrane I: distal phalanx of thumb A: flexion of distal phalanx of thumb
29
pronator quadratus
O: distal fourth of ulna I: distal part of radius A: pronation of forearm and hand
30
brachioradialis
O: lateral supracondylar ridge of humerus, lateral intermuscular septa of arm I: lateral side of distal end of radius A: flexion of forearm
31
Extensor carpi radialis longus
O: lateral supracondylar ridge&lateral intermuscular septa, epicondyle of humerus I: base of 2nd metacarpal A: extension and radial deviation of hand
32
Extensor carpi radlialis brevis
O: lateral epicondyle of humerus, intermuscular septa, antebrachial fascia I: base of 3rd metacarapl A: extension of hand
33
Extensor digitorum
O: lateral epicondyle of humerus, intermuscular septa, and antebrachial fascia I: middle and distal phalanges of each of 4 fingers A: extension of each of 4 fingers
34
Extensor digit minimi
O: lateral epicondyle of humerus and intermuscular septa in common with extensor digitorum I: middle and distal phalanges of little finger A: extension and abduction of pinky
35
Extensor carpi ulnaris
O: lateral epicondyle of humerus, proximal 1/2 of posterior border of ulna I: base of fifth metacarpal A: extension and ulnar deviation of hand
36
Supinator
O: posterolateral surface of ulna below radial notch, lateral epicondyle, radial collateral and annular ligaments I: lateral and adjacent posterior and anterior aspects of proximal shaft of humerus A: supination of forearm
37
abductor pollicis longus
O: posterior surface of ulna and radius, interosseous membrane I: base of first metacarpal A: abduction and extension of thumb, abduction and flexion of hand at wrist
38
Extensor pollicis brevis
O: posterior surface of radius, interosseous membrane I: proximal phalanx of thumb A: extension of proximal phalanx and metacarpal of thumb, abduction of hand at wrist
39
Extensor pollicis longus
O: posterior surface of middle 1/3 of ulna, interosseous membrane I: distal phalanx of thumb A: extension of proximal and distal phalanges of thumb, extension and adduction of metacarpal of thumb
40
Extensor indicis
O: posterior surface of ulna, interosseous membrane I: extensor expansion of index finger A: extension and adduction of index finger
41
Palmaris brevis
O: palmar aponeurosis, medial border I: skin on ulnar side of hand A: stabilization of skin of palm for gripping
42
Abductor digit minimi
O: pisiform bone I: base of proximal phalanx of pinky A: flexion of pinky
43
flexor digiti minimi brevis
O: flexor retinaculum, hook of hamate I: proximal phalanx of pinky A: flexion of pinky
44
Opponens digiti minimi
O: flexor retinaculum, hook of hamate I: fifth metacarpal A: opposition of little finger to thumb
45
Abductor pollicis brevis
O: flexor retinaculum, scaphoid and trapezium I: base of proximal phalanx A: abduction of thumb
46
Opponens pollicis
O: flexor retinaculum, trapezium I: first metacarpal A: opposition of thumb
47
Flexor pollicis brevis
O: flexor retinaculum (superficial), trapezoid and capitate (deep) I: base of proximal phalanx A: flexion of thumb, aids in opposition and adduction
48
Abductor pollicis
O: third metacarpal (transverse), capitate, trapezoid, trapezium, and bases of first 3 metacarpals I: base of proximal phalanx A: adduction and flexion of thumb

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