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Upper Limb > Muscles of the Upper Limb > Flashcards

Muscles of the Upper Limb Flashcards

1
Q

Triceps Brachii (Lateral)

A

O: Posterolateral humerus proximal to radial groove
I: Olecranon process (triceps brachii tendon)
NS: Radial nerve (C6-C8)
A: Elbow extension

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2
Q

Triceps Brachii Medius

A

O: Posterolateral humerus distal to radial groove
I: Olecranon process (triceps brachii tendon)
NS: Radial nerve (C6-C8)
A: Elbow extension

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3
Q

Triceps Brachii (Long)

A

O: Infraglenoid tubercle of scapula
I: Olecranon process (triceps brachii tendon)
NS: Radial nerve (C6-C8)
A: Elbow extension, shoulder extension and adduction

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4
Q

Biceps Brachii (Long)

A

O: Supraglenoid tubercle of scapula
I: Radial tuberosity
NS: Musculocutaneous nerve
A: Supination, elbow flexion, arm flexion

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5
Q

Biceps Brachii (Short)

A

O: Coracoid process of scapula
I: Radial tuberosity
NS: Musculocutaneous nerve
A: Supination, elbow flexion, arm flexion

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6
Q

Brachialis

A

O: Distal anterior surface of humerus
I: Coronoid process of ulna
NS: Musculocutaneous nerve
A: Elbow flexion

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7
Q

Coracobrachialis

A

O: Coracoid process of scapula
I: Upper 1/3 anterior humerus
NS: Musculocutaneous nerve
A: Adduction, arm flexion, internal rotation

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8
Q

Pronator Teres

A

O: CFO
I: Lateral radius - distal to supinator
NS: Median nerve (C6-C7)
A: Pronation

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9
Q

Flexor Carpi Radialis

A

O: CFO
I: Base of 2nd and 3rd mets
NS: Median nerve (C6-C7)
A: Wrist flexion, hand abduction

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10
Q

Palmaris Longus

A

O: CFO
I: Palmar aponeurosis
NS: Median nerve (C6-C7)
A: Tightens palmar aponeurosis, wrist flexion

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11
Q

Flexor Carpi Ulnaris

A

O: CFO, medial olecranon
I: Pisiform, hook of hamate, base 5th met
NS: Ulnar nerve (C7-T1)
A: Wrist flexion, hand adduction

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12
Q

Flexor Digitorum Superficialis

A

O: Humeroulnar head: CFO; Radial head: middle 1/3 radius
I: Shafts of middle phalanges (2nd-5th)
NS: Median nerve (C8-T1)
A: Flexion of metacarpophalangeal and proximal interphalangeal joints (2nd-5th), wrist flexion

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13
Q

Flexor Digitorum Profundus

A

O: Posterior and medial ulnar borders, interosseous membrane
I: Base and palmar surface of distal phalanges (2nd-5th)
NS: Median and ulnar nerves
A: Wrist flexion, flexion of metacarpophalangeal, proximal/distal interphalangeal joints (2nd-5th)

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14
Q

Flexor Pollicis Longus

A

O: Interosseous membrane, anterior surface radius
I: Palmar side of distal phalanx (1st)
NS: Median nerve
A: Wrist abduction, flexion of carpometacarpal, metacarpophalangeal and interphalangeal joints

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15
Q

Pronator Quadratus

A

O: Anterior surface distal ulna
I: Anterior surface distal radius
NS: Median nerve
A: Pronation, stabilisation of distal radioulnar joint

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16
Q

Brachioradialis

A

O: Lateral supracondylar ridge
I: Lateral styloid process (radius)
NS: Radial nerve (C5-C6)
A: Elbow flexion, pronation, supination

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17
Q

Extensor Carpi Radialis Longus

A

O: Lateral supracondylar ridge
I: Dorsal base 2nd met
NS: Radial nerve (C5-C6)
A: Abduction of wrist

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18
Q

Extensor Carpi Radialis Brevis

A

O: CEO
I: Dorsal base 3rd met
NS: Deep Radial nerve (C7-C8)
A: Abduction of wrist

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19
Q

Extensor Digitorum

A

O: CEO
I: Dorsal digital expansion of 2nd-5th digits
NS: Deep radial nerve
A: Wrist extension, extension of metacarpophalangeal and interphalangeal joints (2nd-5th)

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20
Q

Extensor Digiti Minimi

A

O: CEO
I: Dorsal digital expansion 5th digit
NS: Posterior interosseous nerve
A: Wrist extension, ulnar abduction, abduction and extension of metacarpophalangeal and interphalangeal joints (5th digit)

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21
Q

Extensor Carpi Ulnaris

A

O: CEO
I: Base of 5th met (medial)
NS: Deep Radial nerve (C7-C8)
A: Wrist extension and abduction

22
Q

Anconeus

A

O: CEO
I: Lateral olecranon, superior/posterior ulna
NS: Radial nerve
A: Elbow extension, locking of elbow

23
Q

Supinator

A

O: CEO
I: Proximal 1/3 lateral radius
NS: Deep Radial nerve (C6-C7)
A: Supination

24
Q

Abductor Pollicis Longus

A

O: Medial 1/3 posterior surface radius and ulna, interosseous membrane
I: Base of 1st met (radial side)
NS: Deep Radial nerve
A: Abduction of radiocarpal and carpometacarpal joints

25
Extensor Pollicis Longus
O: Posterolateral surface of ulna, interosseous membrane I: Base of distal phalanx NS: Posterior interosseous nerve A: Wrist extension and radial abduction, adduction of carpometacarpal joint, extension of metacarpophalangeal and interphalangeal joints
26
Extensor Pollicis Brevis
O: Posterior surface distal radius, interosseous membrane I: Base of proximal phalanx NS: Posterior interosseous nerve A: Abduction at radiocarpal joint, extension of carpometacarpal and metacarpophalangeal joints
27
Extensor Indicis
O: Posterolateral surface ulna, interosseous membrane I: Joins extensor digitorum tendon 2nd digit and insert into proximal digital expansion NS: Posterior interosseous nerve A: Wrist extension, extension of metacarpophalangeal and interphalangeal joints (2nd digit)
28
Abductor Pollicis Brevis
O: Flexor retinaculum, scaphoid and trapezium tubercles I: Lateral proximal phalanx NS: Recurrent branch of Median nerve A: Abduction of carpometacarpal joint
29
Flexor Pollicis Brevis
O: Flexor retinaculum, trapezium, capitate I: Base of lateral proximal phalanx NS: Recurrent branch of Median nerve (superficial) and Deep Ulnar nerve (deep) A: Flexes thumb
30
Opponens Pollicis
O: Flexor retinaculum, scaphoid and trapezium tubercles I: Lateral side 1st met NS: Recurrent branch of Median nerve A: Draws thumb into opposition
31
Abductor Digiti Minimi
O: Pisiform I: Medial side, base of proximal phalanx (5th) NS: Deep Ulnar nerve A: Abducts 5th digit
32
Flexor Digiti Minimi
O: Hook of Hamate, flexor retinaculum I: Medial side, base of proximal phalanx (5th) NS: Deep Ulnar nerve A: Flexes proximal phalanx (5th)
33
Opponens Digiti Minimi
O: Hook of Hamate, flexor retinaculum I: Medial border 5th met NS: Deep Ulnar nerve A: Opposition of 5th digit
34
Adductor Pollicis
O: Base of 2nd and 3rd metacarpals, capitate, anterior surface of 3rd met I: Medial side, base of proximal phalanx (1st) NS: Deep Ulnar nerve A: Adducts thumb
35
Lumbricals 1 and 2
O: Lateral 2 tendons of FDP I: Lateral side, extensor expansions (2nd-3rd) NS: Median nerve A: Flexes metacarpophalangeal joints, extends interphalangeal joints
36
Lumbricals 3 and 4
O: Medial 3 tendons of FDP I: Lateral side, extensor expansions (4th-5th) NS: Deep Ulnar nerve A: Flexes metacarpophalangeal joints, extends interphalangeal joints
37
Dorsal Interossei
O: Adjacent 2 metacarpals I: Base of proximal phalanges, extensor expansions (2nd-4th) NS: Deep Ulnar nerve A: Abduct digits from axial line (assists lumbricals)
38
Palmar Interossei
O: Palmar surface of 2nd, 4th and 5th mets I: Extensor expansions (2nd, 4th, 5th) NS: Deep Ulnar nerve A: Adduct digits towards axial line (assists lumbricals)
39
Deltoid
O: Acromion, spine of scapula, lateral 1/3 clavicle I: Deltoid tuberosity NS: Axillary nerve A: Abduction, flexion, internal rotation, extension, external rotation
40
Subscapularis
O: Subscapular fossa I: Lesser tubercle NS: Subscapular nerve A: Internal rotation, extension
41
Supraspinatus
O: Supraspinous fossa I: Proximal aspect of greater tubercle NS: Suprascapular nerve A: Abduction
42
Infraspinatus
O: Infraspinous fossa I: Middle aspect of greater tubercle NS: Suprascapular nerve (C4-C6) A: External rotation
43
Teres Minor
O: Upper 2/3 lateral border scapula I: Distal aspect of greater tubercle NS: Axillary nerve A: External rotation, adduction
44
Pectoralis Major
O: Medial 1/2 clavicle, manubrium/sternum, ribs 1-6 I: Bicipital (intertubercular) groove (sulcus) NS: Medial and lateral pectoral nerves (C5-T1) A: Horizontal flexion, adduction, internal rotation
45
Pectoralis Minor
O: 3rd to 5th ribs I: Coracoid process of scapula NS: Medial pectoral nerve (C8-T1) A: Pulls scapula medially, forwards and downwards
46
Trapezius
O: C1-T12 vertebrae I: Lateral 1/3 clavicle, medial side acromion, upper crest of scapula spine NS: Accessory nerve (CN XI) A: Scapula retraction, superior rotation, elevation, depression
47
Levator Scapulae
O: Transverse processes C1-C4 vertebrae I: Superior angle to medial border of scapula NS: Dorsal scapular nerve (C5), C3 and C4 nerves A: Lateral head and neck flexion
48
Teres Major
O: Dorsal surface inferior angle of scapula I: Crest of lesser tubercle NS: Subscapular nerve A: Internal rotation, adduction, extension
49
Latissimus Dorsi
O: Inferior angle of scapula, 9th-12th ribs, T7-T12 vertebrae, posterior 1/3 iliac crest I: Bicipital (intertubercular) groove (sulcus) NS: Thoracodorsal nerve A: Extension, adduction, internal rotation
50
Serratus Anterior
O: 1st-9th ribs I: Medial margin of costal surface of scapula NS: Long thoracic nerve (C5-C7) A: Scapula superior external rotation and protraction, lowers arm, elevation of ribs
51
Rhomboids
O: C7-T5 vertebrae I: Median margin of scapula (inferior to spine) NS: Dorsal scapular nerve (C4-C5) A: Scapula stabilisation, retraction, elevation and internal rotation
52
Subclavius
O: Costal cartilage 1st rib I: Subclavian groove NS: Subclavian nerve A: Draws clavicle downward and forward, elevates 1st rib

Upper Limb (9 decks)

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