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PHTH 510 > Muscles of the Forearm > Flashcards

Muscles of the Forearm Flashcards

1
Q

what is the origin of coracobrachialis?

A

coracoid process

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1
Q

what is the insertion of coracobrachialis?

A

mid shaft of humerus on antero-medial surface

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2
Q

what is the innervation of coracobrachialis?

A

musculocutaneous nerve

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3
Q

what is the action of coracobrachialis?

A

adduction and flexion of the arm

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4
Q

what is the origin of the brachialis

A

the anterior distal half of the humerus

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5
Q

what is the insertion of brachialis

A

the tuberosity of the ulna

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6
Q

what is the innervation of the brachialis

A

musculocutaneous nerve

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7
Q

what is the action of the brachialis

A

flexion of the forearm

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8
Q

what is the most powerful flexor?

A

the brachialis muscle because it only acts across one joint

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9
Q

what is the origin of the biceps brachii

A

the long head originates at the supraglenoid tubercle of the scapula.
the short head originates at the coracoid process.

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10
Q

what is the insertion of biceps brachii

A

radial tuberosity

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11
Q

what is the innervation of the biceps brachii

A

musculocutaneous nerve

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12
Q

what is the action of the biceps brachii

A

flexion and supination of forearm

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13
Q

what is the origin of the triceps brachii

A

Long head: infraglenoid tubercle
Lateral head: posterior surface of humerus
medial head: posterior surface of humerus

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14
Q

what is the insertion of the triceps brachii

A

olecrannon

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15
Q

what is the innervation of the triceps brachii

A

radial nerve

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16
Q

what is the action of the triceps brachii

A

extension of the forearm and the long head can also extend and adduct the arm

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17
Q

what is the origin of flexor carpi ulnaris?

A

medial epicondyle and olecranon

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18
Q

what is the insertion of flexor carpi ulnaris?

A

pisiform, hamate, and 5th metacarpal

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19
Q

what is the innervation of flexor carpi ulnaris

A

ulnar nerve (C7,C8)

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20
Q

what is the action of flexor carpi ulnaris

A

flex and adduct the wrist (ulnar deviation)

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21
Q

what is the origin of palmaris longus

A

medial epicondyle

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22
Q

what is the insertion of palmaris longus

A

palmar aponeurosis and flexor retinaculum

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23
Q

what is the innervation of palmaris longus

A

median nerve

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24
what is the action of palmaris longus
flexes the wrist and tense the palmar aponeurosis
25
what test can you do to see if you have a palmaris longus
shaeffers test. palmaris longus is absent in about 15% of people
26
what is the origin of flexor carpi radialis
medial epicondyle
27
what is the insertion of flexor carpi radialis
base of metacarpal II and III
28
what is the innervation of flexor carpi radialis
median nerve
29
what is the action of flexor carpi radialis
flexed and abduct the wrist
30
what is the origin of pronator teres
medial epicondyle and coronoid process
31
what is the insertion of pronator teres
lateral surface mid shaft of radius
32
what is the innervation of pronator teres
median nerve
33
what is the action of pronator teres
pronation
34
what is the origin of the flexor digitorum superficialis
medial epicondyle and margin of coronoid process; oblique line of radius
35
what is the insertion of flexor digitorum superficialis
middle phalanges of the index, middle, ring, and little fingers
36
what is the innervation of flexor digitorum superficialis
median nerve
37
what is the action of flexor digitorum superficialis
flex the wrist, flex the middle and proximal phalanges of digits 2-5
38
what is the origin of flexor digitorum profundus
anterior and medial surface of ulna and interosseus membrane
39
what is the insertion of flexor digitorum profundus
distal phalanges of the index, middle, ring, and little fingers
40
what is the innervation of flexor digitorum profundus
interosseus branch od the medial and ulnar nerves
41
what is the action of the flexor digitorum profundus
flex the distal interphalangeal joints
42
what is the origin of flexor pollicis longus
anterior surface of radius and interosseus membrane
43
what is the insertion of flexor pollicis longus
base of distal phalanx of the thumb
44
what is the innervation of flexor pollicis longus
median nerve
45
what is the action of flexor pollicis longus
flexes the distal phalanx of the thumb
46
what is the origin of pronator quadratus
distal fourth of anterior surface of the ulna
47
what is the insertion of pronator quadratus
distal fourth of the anterior surface of the radius
48
what is the innervation of pronator quadratus
anterior interosseus
49
what is the origin of brachioradialis
lateral supracondylar ridge
50
what is the insertion of brachiradialis
lateral side of the base of the styloid process of the radius
51
what innervates the brachioradialis
radial nerve
52
what is the action of the brachioradialis
flex the forearm at the elbow
53
what is the origin of extensor carpi radialis longus
lateral Supracondylar ridge
54
what is the insertion of extensor carpi radialis longus
base of metacarpal II
55
what is the innervation of extensor carpi radialis longus
radial nerve
56
what is the innervation of extensor carpi radialis longus
radial nerve
57
what is the action of extensor carpi radialis longus
extend and abduct the wrist
58
what is the origin of extensor carpi radialis brevis
lateral epicondyle
59
what is the insertion of extensor carpi radialis brevis
base of metacarpal III
60
what is the innervation of extensor carpi radialis brevis
deep branch of the radial nerve
61
what is the origin of extensor digitorum
lateral epicondyle
62
what is the insertion of extensor digitorum
base of middle and phalanges of index, middle, ring, and little fingers
63
what innervates extensor digitorum
posterior interosseus
64
what is the action of extensor digitorum
extends the index, middle, ring, and little finger
65
what is the origin of extensor digiti minimi
lateral epicondyle
66
what is the insertion of extensor digiti minimi
dorsal digital expansion on the 1st phalanx of the little finger
67
what is the innervation of extensor digiti minimi
posterior interosseus
68
what is the action of extensor digiti minimi
extend the little finger
69
what is the origin of extensor carpi ulnaris
lateral epicondyle and posterior border of ulna
70
what is the insertion extensor carpi ulnaris
tubercle on the base of the medial side of metacarpal V
71
what is the innervation of extensor carpi ulnaris
posterior interosseus
72
what is the action of extensor carpi ulnaris
extend and adduct the wrist
73
what is the origin of anconeus
lateral epicondyle
74
what is the insertion of anconeus
olecranon process an proximal posterior surface of ulna
75
what is the innervation of anconeus
radial nerve
76
what is the action of anconeus
abduct the ulna in pronation to maintain the center of the palm over the same point when the hand is flipped. it is an accessory extensor of the elbow joint.
77
what is the origin of supinator
superior-lateral epicondyle deep- superior crest of ulna
78
what is the insertion of supinator
the lateral surface of radius superior to the anterior oblique line
79
what is the innervation of supinator
posterior interosseus
80
what is the origin of abductor pollicis longus
posterior surface of ulna and radius and interosseus membrane
81
what is the insertion of abductor pollicis longus
lateral side of base of metacarpal I
82
what is the innervation of abductor pollicis longus
posterior interosseus
83
what is the action of abductor pollicis longus
abduct CMC joint of thumb
84
what is the origin of extensor pollicis brevis
posterior surface of radius and interosseus membrane
85
what is the insertion of extensor pollicis brevis
dorsal surface of base of proximal phalanx of the thumb
86
what is the action of extensor pollicis brevis
extension of the thumb and adduction of the wrist
87
what is the origin of extensor pollicis longus
posterior surface of ulna and interosseus membrane
88
what is the insertion of extensor pollicis longus
dorsal surface of base of distal phalanx of thumb
89
what is the origin of extensor indicis
posterior surface of ulna and interosseus membrane
90
what is the insertion of extensor indicis
extensor hood of index finger
91
what is the innervation of extensor indicis
posterior interosseus
92
what is the action of extensor indicis
extension of the wrist and joints of the second digit

PHTH 510 (7 decks)

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