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DPTR5001 - Clinical Anatomy I > Upper Extremity - Muscle Attachments, Actions, And Innervation > Flashcards

Upper Extremity - Muscle Attachments, Actions, And Innervation Flashcards

(114 cards)

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1
Q

Latissimus dorsi - attachments

A

From lower thoracic spinous processes, thoracolumbar fascia & iliac crest to the floor of the intertubercular sulcus of the humerus.

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2
Q

Latissimus dorsi - action

A

Adduction, extension & internal rotation of humerus.

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3
Q

Latissimus dorsi - innervation

A

Thoracodorsal nerve (C6-8).

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4
Q

Levator scapulae - attachments

A

From transverse processes of C1-C4 to the superior angle & superomedial border of the scapula.

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5
Q

Levator scapulae - action

A

Elevation & downward rotation of the scapula.

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6
Q

Levator scapulae - innervation

A

Dorsal scapular nerve (C4-5) (sensory: direct branches of C3-4).

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7
Q

Pectoralis major - attachments

A

From clavicle, costal cartilages, sternum & aponeurosis of the external oblique to the lateral lip of the intertubercular sulcus of the humerus.

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8
Q

Pectoralis major - action

A

Humeral adduction, flexion & internal rotation (sternocostal portion assists with extension of the flexed arm).

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9
Q

Pectoralis major - innervation

A

Medial & lateral pectoral nerves (clavicular head C5-7; sternocostal head C8-T1).

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10
Q

Pectoralis minor - attachments

A

From outer surfaces of ribs 3-5 to the coracoid process.

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11
Q

Pectoralis minor - action

A

Anterior tilt of scapula; assists with depression of the shoulder & forced inspiration.

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12
Q

Pectoralis minor - innervation

A

Medial & lateral pectoral nerves (C5-T1).

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13
Q

Rhomboids - attachments

A

Major: from spinous processes T2-5; Minor: from ligamentum nuchae & spinous processes C7-T1 to the medial border of the scapula.

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14
Q

Rhomboids - action

A

Scapular retraction, elevation (upper) & downward rotation.

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15
Q

Rhomboids - innervation

A

Dorsal scapular nerve (C4-5) (sensory: direct branches of C3-4).

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16
Q

Serratus anterior - attachments

A

From the outer surfaces & superior borders of upper eight-ten ribs to the costal surface of the medial border of the scapula.

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17
Q

Serratus anterior - action

A

Scapular protraction & upward rotation.

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18
Q

Serratus anterior - innervation

A

Long thoracic nerve (C5-7).

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19
Q

Subclavius - attachments

A

From 1st rib & cartilage to the undersurface of the clavicle.

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20
Q

Subclavius - action

A

Depresses & stabilizes the clavicle.

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21
Q

Subclavius - innervation

A

Subclavian nerve (C5-6).

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22
Q

Trapezius - attachments

A

From the superior nuchal line, external occipital protuberance, ligamentum nuchae, & cervical & thoracic spinous processes to the clavicle, acromion & scapular spine.

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23
Q

Trapezius - action

A

Scapular elevation (upper), depression (lower), retraction (middle) & upward rotation (upper & lower).

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24
Q

Trapezius - innervation

A

Accessory nerve (CN XI; motor) & C3-4 (sensory).

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25
Deltoid - attachments
From the clavicle, acromion & spine of the scapula to the deltoid tuberosity of the humerus.
26
Deltoid - action
Flexion & internal rotation (anterior), abduction (primarily middle), extension & external rotation, horizontal extension (posterior) of humerus.
27
Deltoid - innervation
Axillary nerve (C5-6; anterior, middle, & posterior portions).
28
Supraspinatus - attachments
From the medial 2/3 of the supraspinous fossa to the superior facet of the greater tubercle of the humerus & to shoulder joint capsule.
29
Supraspinatus - action
Initiates humeral abduction & externally rotates humerus; stabilizes glenohumeral joint (reinforces superior aspect of joint capsule).
30
Supraspinatus - innervation
Suprascapular nerve (C4-6).
31
Infraspinatus - attachments
From the medial 2/3 of the infraspinous fossa to the middle facet of the greater tubercle of the humerus & to shoulder joint capsule.
32
Infraspinatus - action
External rotation of humerus; stabilizes glenohumeral joint.
33
Infraspinatus - innervation
Suprascapular nerve (C5-6).
34
Teres minor - attachments
From the upper 2/3 of the dorsal surface of the lateral border of the scapula to the inferior facet of the greater tubercle of the humerus & to shoulder joint capsule.
35
Teres minor - action
External rotation of humerus; stabilizes glenohumeral joint.
36
Teres minor - innervation
Axillary nerve (C5-6).
37
Subscapularis - attachments
From the subscapular fossa to the lesser tubercle of the humerus.
38
Subscapularis - action
Internal rotation of humerus; stabilizes glenohumeral joint.
39
Subscapularis - innervation
Upper & lower subscapular nerves (C5-6).
40
Teres major - attachments
From the dorsal surface of the inferior angle scapula & lower 1/3 of the lateral border of the scapula to the medial lip of the intertubercular sulcus of the humerus.
41
Teres major - action
Humeral adduction, internal rotation, & extension.
42
Teres major - innervation
Lower subscapular nerve (C5-6).
43
Anconeus - attachments
From the lateral epicondyle of the humerus to the lateral surface of the olecranon process
44
Anconeus - action
Extension of the elbow
45
Anconeus - innervation
Radial nerve (C7-8)
46
Biceps brachii - attachments
From coracoid process (short head) & supraglenoid tubercle (long head) of the scapula to the radial tuberosity & the deep antebrachial fascia (through the bicipital aponeurosis)
47
Biceps brachii - action
Flexion of the shoulder & elbow, & supination of the forearm
48
Biceps brachii - innervation
Musculocutaneous nerve (C5-6)
49
Brachialis - action
From the distal anterior shaft of the humerus & lateral & medial intermuscular septa to the coronoid process & ulnar tuberosity
50
Brachialis - action
Flexion of the elbow
51
Brachialis - innervation
Musculocutaneous (C5-6) & small branch from radial nerve
52
Coracobrachialis - attachments
From the coracoid process to the proximal medial shaft of the humerus
53
Coracobrachialis - action
Flexion & adduction of the shoulder
54
Coracobrachialis - innervation
Musculocutaneous nerve (C6-7)
55
Triceps brachii - attachments
From the infraglenoid tubercle of the scapula (long head), & proximal posterolateral (lateral head) & distal posteromedial (medial) shaft of the humerus to the olecranon process of the ulna
56
Triceps brachii - action
Extension of the shoulder (long head) & extension of the elbow (long, lateral & medial heads)
57
Triceps brachii - innervation
Radial nerve (C6-T1)
58
Abductor pollicis longus - attachments
From proximal posterior radius, ulna & interosseous membrane to the base of the 1st metacarpal & trapezium
59
Abductor pollucis longus - action
Abducts & extends thumb at carpometacarpal joint & abducts hand at wrist (radial deviation)
60
Abductor pollucis longus - innervation
Radial nerve (C6-8)
61
Brachioradialis - attachments
From the lateral supracondylar ridge of the humerus to the distal radius, lateral to the styloid process
62
Brachioradialis - action
Flexes the elbow
63
Brachioradialis - innervation
Radial nerve (C5-6)
64
Extensor carpi radialis brevis - attachments
From the lateral epicondyle of the humerus (common extensor origin) to the base of the 3rd metacarpal
65
Extensor carpi radialis brevis - action
Extends and abducts the hand at the wrist (radial deviation)
66
Extensor carpi radialis brevis - innervation
Radial nerve (C6-8)
67
Extensor carpi radialis longus - attachments
From the lateral supracondylar ridge of the humerus to the base of the 2nd metacarpal
68
Extensor carpi radialis longus - action
Extends & abducts hand at wrist (radial deviation) & assists in flexion of the elbow
69
Extensor carpi radialis longus - innervation
Radial nerve (C6-8)
70
Extensor carpi ulnaris - attachments
From the lateral epicondyle of the humerus (common extensor origin) to the base of the 5th metacarpal
71
Extensor carpi ulnaris - action
Extends & adducts the hand at the wrist
72
Extensor carpi ulnaris - innervation
Radial nerve (C6-8)
73
Extensor digitorum - attachments
From the lateral epicondyle of the humerus (common extensor origin) to the extensor expansions of digits 2-5
74
Extensor digitorum - action
Extends phalanges (primarily at metacarpophalangeal, secondarily at interphalangeal) & hand at wrist
75
Extensor digitorum - innervation
Radial nerve (C6-8)
76
Extensor digiti minimi - attachments
From the lateral epicondyle of the humerus (common extensor origin) to the digital expansion of the 5th digit
77
Extensor digiti minimi - action
Extends 5th digit (metacarpophalangeal & interphalangeal)
78
Extensor digiti minimi - innervation
Radial nerve (C7-8)
79
Extensor indicis - attachments
From the posterior surface of the ulna & interosseous membrane to the digital expansion of the 2nd digit
80
Extensor indicis - action
Extends 2nd digit (metacarpophalangeal & interphalangeal)
81
Extensor indicis - innervation
Radial nerve (C7-8)
82
Extensor pollicis brevis - attachments
From the posterior radial surface & interosseous membrane to the base of the 1st proximal phalanx
83
Extensor pollicis brevis - action
Extends thumb (metacarpophalangeal) & extends & abducts CMC joint
84
Extensor pollicis brevis - innervation
Radial nerve (C6-8)
85
Extensor pollicis longus - attachments
From the middle 1/3rd of the posterior surface of the ulna & interosseous membrane to the base of the 1st distal phalanx
86
Extensor pollicis longus - action
Extends thumb (CMC & metacarpophalangeal & interphalangeal)
87
Flexor carpi radialis - attachments
From the medial epicondyle (common flexor origin) to the palmar aspect of the base of the 2nd metacarpal
88
Flexor carpi radialis - action
Flexes & abducts hand at wrist (radial deviation) & may assist in pronation of forearm & flexion of the elbow
89
Flexor carpi radialis - innervation
Median nerve (C6-8)
90
Flexor carpi ulnaris - attachments
From the medial epicondyle (common flexor origin) of the humerus & proximal ulnar shaft to the pisiform
91
Flexor carpi ulnaris - action
Flexes & adducts hand at wrist (ulnar deviation) & assists in flexion of the elbow
92
Flexor carpi ulnaris - innervation
Ulnar nerve (C7-T1)
93
Flexor digitorum profundus - attachments
From the anterior proximal two-thirds of the ulna & interosseous membrane to the base of the distal phalanges of digits 2-5
94
Flexor digitorum profundus - action
Flexion of digits 2-5 (metacarpophalangeal & distal interphalangeal & proximal interphalangeal), & flexion of hand at wrist
95
Flexor digitorum profundus - innervation
Median nerve (C7-T1)
96
97
Flexor digitorum superficialis - attachments
From the medial epicondyle (common flexor origin) of the humerus to the sides of the middle phalanges of digits 2-5
98
Flexor digitorum superficialis - action
Flexion of digits (metacarpophalangeal & proximal interphalangeal), & hand at wrist
99
Flexor digitorum superficialis - innervation
Median nerve (C7-T1)
100
Flexor pollicis longus - attachments
From the anterior surface of the radius & interosseous membrane to the base of the distal phalanx of the thumb
101
Flexor pollicis longus - action
Flexes thumb (metacarpophalangeal & interphalangeal)
102
Flexor pollicis longus - innervation
Median nerve (C7-T1) (anterior interosseous nerve)
103
Palmaris longus - attachments
From the medial epicondyle of the humerus (common flexor origin) to the palmar aponeurosis
104
Palmaris longus - action
Flexes hand at wrist & tenses palmar fascia
105
Palmaris longus - innervation
Median nerve (C7-8)
106
Pronator quadratus - attachments
From the anterior surface of the distal ulna to the anterior surface of the distal radius
107
Pronator quadratus - action
Pronates the forearm
108
Pronator quadratus - innervation
Median nerve (C8-T1) (anterior interosseous nerve)
109
Pronator teres - attachments
From the medial epicondyle & ulnar coronoid process to lateral aspect of the radius
110
Pronator teres - action
Pronates & flexes the forearm
111
Pronator teres - innervation
Median nerve (C6-7)
112
Supinator - attachments
From the lateral epicondyle of the humerus, the radial collateral ligament & supinator crest of the ulna to the lateral surface of the proximal radius
113
Supinator - action
Supinates forearm
114
Supinator - innervation
Radial nerve (C5-6)

DPTR5001 - Clinical Anatomy I (1 decks)

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