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Anatomy > Muscles Of The Anterior And Posterior Arm And Forearm > Flashcards

Muscles Of The Anterior And Posterior Arm And Forearm Flashcards

1
Q

Biceps brachii origin and insertion

A

O: long head- supraglenoid tubercle, short head- coracoid process
I: radial tuberosity

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2
Q

Biceps brachii innervation and action

A

Innervation: musculocutaneous nerve (C5-C7)
Action: forearm supination, elbow flexion, long head- shoulder flexion, abduction (15%)

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3
Q

Brachialis origin and insertion

A

O: distal anterior humerus
I: coronoid process of the ulna and ulnar tuberosity

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4
Q

Brachialis innervation and action

A

Innervation: musculocutaneous nerve (C5-C7)
Action: elbow flexion

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5
Q

Coracobrachialis origin and insertion

A

(Not palpable)
O: coracoid process of the scapula
I: distal medial humerus

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6
Q

Coracobrachialis innervation and action

A

Innervation: musculocutaneous nerve (C5-C7)
Action: shoulder flexion and adduction

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7
Q

Triceps brachii origin and insertion

A

O: long head- infraglenoid tubercle of the scapula, lateral head- posterior aspect of the humerus superior to the radial groove, medial head- posterior aspect of the humerus inferior to the radial groove
I: olecranon process of the ulna

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8
Q

Triceps brachii innervation and action

A

Innervation: radial nerve (C6-C8)
Action: elbow extension, long head- helps with shoulder extension

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9
Q

Anconeus origin and insertion

A

(Not palpable)
O: lateral epicondyle of the humerus
I: posterior aspect of the ulna

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10
Q

Anconeus innervation and action

A

Innervation: radial nerve (C6-C8)
Action: assists with elbow extension, helps stabilize the lateral aspect of the elbow

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11
Q

Brachioradialis origin and insertion

A

O: lateral supracondylar ridge of the humerus
I: distal lateral radius

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12
Q

Brachioradialis innervation and action

A

Innervation: radial nerve (C6-T1)
Action: elbow flexion and assisting synergistic for forearm supination

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13
Q

Extensor carpi radialis longus origin and insertion

A

O: lateral supracondylar ridge of the humerus
I: second metacarpal

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14
Q

Extensor carpi radialis longus innervation and action

A

Innervation: radial nerve (C6-T1)
Action: wrist extension and radial deviation

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15
Q

Extensor carpi radialis brevis origin and insertion

A

O: lateral epicondyle of the humerus via the common extensor tendon
I: third metacarpal

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16
Q

Extensor carpi radialis brevis innervation and action

A

Innervation: radial nerve (C6-T1)
Action: wrist extension and radial deviation

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18
Q

Extensor digitorum communis innervation and action

A

Innervation: radial nerve (C6-T1)
Action: extension of digits 2-5 at the metacarpophalangeal (MCP) joints, can also help extend wrist

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19
Q

Extensor digitorum communis origin and insertion

A

O: lateral epicondyle of the humerus via the common extensor tendon
I: extensor expansions of digits 2-5 (4 tendons to each digit, central slip goes to middle phalanx, 2 collateral bands go to distal phalanx)

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20
Q

Extensor digiti minimi origin and insertion

A

O: lateral epicondyle of the humerus via the common extensor tendon
I: extensor expansion of digit 5

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21
Q

Extensor digiti minimi innervation and action

A

Innervation: radial nerve (C6-T1)
Action: extends digit 5 at MCP joint, can also help extend wrist

21
Q

Extensor carpi ulnaris origin and insertion

A

O: lateral epicondyle of the humerus via the common extensor tendon and the posterior border of the ulna
I: fifth metacarpal

22
Q

Extensor carpi ulnaris innervation and action

A

Innervation: radial nerve (C6-T1)
Action: wrist extension and ulnar deviation

23
Q

Supinator origin and insertion

A

(Not palpable)
O: lateral epicondyle of the humerus via the common extensor tendon, and proximal ulna (supinator crest)
I: proximal lateral radius

24
Q

Supinator innervation and action

A

Innervation: radial nerve (C6-T1)
Action: forearm supination

25
Q

Abductor pollicis longus origin and insertion

A

O: posterior surface of the radius, ulna, and interosseous membrane
I: first metacarpal

26
Q

Abductor pollicis longus innervation and action

A

Innervation: radial nerve (C6-T1)
Action: abduction of the thumb (at the first CMC joint)

27
Q

Extensor pollicis brevis origin and insertion

A

O: posterior surface of radius and interosseous membrane
I: proximal phalanx of digit 1

28
Q

Extensor pollicis brevis innervation and action

A

Innervation: radial nerve (C6-T1)
Action: extension of the thumb (first MCP joint)

29
Q

Extensor pollicis longus origin and insertion

A

O: posterior surface of the ulna and interosseous membrane
I: distal phalanx of digit 1

30
Q

Extensor pollicis longus innervation and action

A

Innervation: radial nerve (C6-T1)
Action: extension of the thumb (MCP and interphalangeal (IP) joint of the first digit)

31
Q

Extensor indicis origin and insertion

A

O: posterior surface of the ulna and interosseous membrane
I: extensor expansion of digit 2

32
Q

Extensor indicis innervation and action

A

Innervation: radial nerve (C6-T1)
Action: extension of digit 2 at the second MCP joint

33
Q

Carpals

A

Proximal row: scaphoid, lunate, triquetrum, pisiform
Distal row: trapezium, trapezoid, capitate, hamate
“Some lovers try positions that they cannot handle”

34
Q

Pronator teres origin and insertion

A

Layer 1
O: humeral head- medial epicondyle of the humerus via the common flexor tendon, ulnar head- coronoid process of the ulna
I: middle lateral radius

35
Q

Pronator teres innervation and action

A

Innervation: median nerve (C6-C8)
Action: forearm pronation and assisting synergist for elbow flexion

36
Q

Flexor carpi radialis origin and insertion

A

Layer 1
O: medial epicondyle of the humerus (common flexor tendon)
I: second and third metacarpal

37
Q

Flexor carpi radialis innervation and action

A

Innervation: median nerve (C7-T1)
Action: wrist flexion and radial deviation

38
Q

Palmaris longus origin and insertion

A

Layer 1
O: medial epicondyle of the humerus (common flexor tendon)
I: palmar aponeurosis and flexor retinaculum

39
Q

Palmaris longus innervation and action

A

Innervation: median nerve (C8-T1)
Action: wrist flexion

40
Q

Flexor carpi ulnaris origin and insertion

A

Layer 1
O: humeral head- medial epicondyle of the humerus (common flexor tendon), ulnar head- posterior border of the ulna
I: pisiform bone, hook of the hamate, fifth metacarpal

41
Q

Flexor carpi ulnaris innervation and action

A

Innervation: ulnar nerve (C7-T1)
Action: wrist flexion and ulnar deviation

42
Q

Flexor digitorum superficialis origin and insertion

A

Layer 2
O: humeroulnar head- medial epicondyle of the humerus (common flexor tendon) and the coronoid process of the ulna, radial head- proximal one half of the radius
I: middle phalanges of digits 2 to 5

43
Q

Flexor digitorum superficialis innervation and action

A

Innervation: median nerve (C8-T1)
Action: flexion of the proximal interphalangeal (PIP) joints of digits 2 to 5

44
Q

Flexor digitorum profundus origin and insertion

A

Layer 3
O: proximal three fourths of the anterior surface of the ulna and interosseous membrane
I: distal phalanges of digits 2 to 5

45
Q

Flexor digitorum profundus innervation and action

A

Innervation: tendon 1 and 2 median nerve, tendon 3 and 4 ulnar nerve (C8-T1)
Action: flexion of the distal interphalangeal (DIP) joints of digits 2 to 5

46
Q

Flexor pollicis longus origin and insertion

A

Layer 3
O: anterior radius and interosseous membrane
I: distal phalanx of digit 1

47
Q

Flexor pollicis longus innervation and action

A

Innervation: median nerve (C8-T1)
Action: flexion of all joints of the first digit

48
Q

Pronator quadratus origin and insertion

A

Layer 4
O: distal 1/4 of the ulna
I: distal 1/4 of the radius

49
Q

Pronator quadratus innervation and action

A

Innervation: median nerve (C8-T1)
Action: forearm pronation

Anatomy (21 decks)

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