Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

Anatomy 1 > Muscles - Shoulder/Arm > Flashcards

Muscles - Shoulder/Arm Flashcards

(69 cards)

Start Studying
1
Q

Action of the Deltoid

A

All fibers: /ABduct the shoulder (glenohumeral joint)

Anterior fibers:
Flex the shoulder
Medially rotate the shoulder
Horizontally ADduct the shoulder

Posterior fibers:
Extend the shoulder
Laterally rotate the shoulder
Horizontally ABduct the shoulder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Origin of the Deltoid

A

Lateral 1/3 of clavicle, acromion and spine of scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Insertion of the Deltoid

A

Deltoid tuberosity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Nerve - Deltoid

A

Axillary C5, C6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Action of the Trapezius

A 
Upper Fibers:
Bilaterally
Extend the head and neck
Unilaterally
Laterally flex the head and neck to the same side
Rotate the head and neck to the opposite side
Elevate the scapula
Upwardly rotate the scapula

Middle Fibers:
ADduct the scapula
Stabilize the scapula

Lower Fibers:
Depress the scapula
Upwardly rotate the scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Origin of the Trapezius

A

External occipital protuberance, medial portion of superior nuchal line of occiput, ligamentum nuchae and spinous processes of C7 through T12

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Insertion of Trapezius

A

Lateral one-third of clavicle, acromion and spine of scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Nerve - Trapezius

A

Spinal portion of Cranial Nerve XI (accessory) and ventral ramus C2, C3, C4

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Action of Latissimus Dorsi

A

Extend the shoulder
ADduct the shoulder
Medially rotate the shoulder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Origin - Latissimus Dorsi

A

Inferior angle of scapula, spinous processes of last six thoracic vertebrae, last three of four ribs, thoracolumbar aponeurosis and posterior iliac crest

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Insertion - Latissimus Dorsi

A

Intertubercular groove of the humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Nerve - Latissimus Dorsi

A

Thoracodorsal C6, C7, C8

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Action - Teres Major

A

Extend the shoulder
ADduct the shoulder
Medially rotate the shoulder

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Origin - Teres Major

A

Inferior angle and lower one-third of lateral border of scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Insertion - Teres Major

A

Crest of the lesser tubercle of the humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Nerve - Teres Major

A

Lower subscapular C5, C6, C7

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Rotator Cuff Muscles:
Supraspinatus
Action - Supraspinatus

A

ABduct the shoulder

Stabilize the head of humerus in glenoid cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Rotator Cuff Muscles:
Supraspinatus
Origin - Supraspinatus

A

Supraspinous fossa of the scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Rotator Cuff Muscles:
Supraspinatus
Insertion - Supraspinatus

A

Great tubercle of the humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Rotator Cuff Muscles:
Supraspinatus
Nerve - Supraspinatus

A

Suprascapular C4, C5, C6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Rotator Cuff Muscles:
Infraspinatus
Action - Infraspinatus

A

Laterally rotate the shoulder
ADduct the shoulder
Stabilize the head of the humerus in glenoid cavity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Rotator Cuff Muscles:
Infraspinatus
Origin - Infraspinatus

A

Infraspinous fossa of scapula

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Rotator Cuff Muscles:
Infraspinatus
Insertion - Infraspinatus

A

Greater tubercle of humerus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Rotator Cuff Muscles:
Infraspinatus
Nerve - Infraspinatus

A

Suprascapular C4, C5, C6

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Rotator Cuff Muscles: Teres Minor Action - Teres Minor
Laterally rotate the shoulder ADduct the shoulder Stabilize the head of humerus in glenoid cavity
26
Rotator Cuff Muscles: Teres Minor Origin - Teres Minor
Upper two-thirds of lateral border of scapula
27
Rotator Cuff Muscles: Teres Minor Insertion - Teres Minor
Greater tubercle of humerus
28
Rotator Cuff Muscles: Teres Minor Nerve - Teres Minor
Axillary C5, C6
29
Rotator Cuff Muscles: Subscapularis Action - Subscapularis
Medially rotate the shoulder | Stabilize the head of the humerus in glenoid cavity
30
Rotator Cuff Muscles: Subscapularis Origin - Subscapularis
Subscapular fossa of the scapula
31
Rotator Cuff Muscles: Subscapularis Insertion - Subscapularis
Lesser tubercle of the humerus
32
Rotator Cuff Muscles: Subscapularis Nerve - Subscapularis
Upper and lower subscapular C5, C6, C7
33
Action - Rhomboid Major and Minor
ADduct the scapula Elevate the scapula Downwardly rotate the scapula
34
Origin - Rhomboid Major and Minor
Major: Spinous processes T2-T5 Minor: Spinous processes C7 and T1
35
Insertion - Rhomboid Major and Minor
Major: Medial border of the scapula between the spine of the scapula and inferior angle Minor: Upper portion of medial border of the scapula, across from spine of scapula
36
Nerve - Rhomboid Major and Minor
Dorsal scapular C4, C5
37
Action - Levator Scapula
``` Unilaterally: Elevate the scapula Downwardly rotate the scapula Laterally flex the neck and head Rotate the head and neck at the same time ``` Bilaterally: Extend the head and neck
38
Origin - Levator Scapula
Transverse processes of first through fourth cervical vertebrae
39
Insertion - Levator Scapula
Medial border of scapula between superior angle and superior portion of spine of scapula
40
Nerve - Levator Scapula
Cervical and Dorsal scapular C4, C5
41
Action - Serratus Anterior
``` With origin fixed: ABduct the scapula Upwardly rotate the scapula Depress the scapula Hold the medial border of the scapula against the rib cage ``` With scapula fixed: May act to elevate the thorax during forced inhalation
42
Origin - Serratus Anterior
External surfaces of upper eight or nine ribs
43
Insertion - Serratus Anterior
Anterior surface of medial border of scapula
44
Nerve - Serratus Anterior
Long Thoracic - C5, C6, C7, C8
45
Sternalis
Present in only 5% of population. Superficial muscle lying on sternum, vertical fibers run from manubrium down to level of the 7th costal cartilage. Fx unknown.
46
Action - Pectoralis Major
All fibers: ADduct the shoulder Medially rotate the shoulder Assist to elevate the thorax during forced inhalation Upper fibers: Flex the shoulder Horizontally ADduct the shoulder Lower fibers: Extend the shoulder
47
Origin - Pectoralis Major
Medial half of clavicle, sternum and cartilage of ribs 1-6
48
Insertion - Pectoralis Major
Crest of greater tubercle of humerus
49
Nerve - Pectoralis Major
Upper fibers: Lateral pectoral C5, C6, C7 | Lower fibers: Lateral and medial pectoral C6, C7, C8, T1
50
Action - Pectoralis Minor
Depress the scapula ABduct the scapula Downwardly rotate the scapula With scapula fixed: Assist to elevate the thorax during forced inhalation
51
Origin - Pectoralis Minor
Ribs 3-5
52
Insertion - Pectoralis Minor
Medial surface of coracoid process of the scapula
53
Nerve - Pectoralis Minor
Medial pectoral C6, C7, C8, T1
54
Action - Subclavius
Depress the clavicle and draw it anteriorly Elevate the first rib (to assist during inhalation) Stabilize the sternoclavicular joint
55
Origin - Subclavius
First rib and cartilage
56
Insertion - Subclavius
Inferior surface of middle 1/3 of clavicle
57
Nerve - Subclavius
Subclavian C5, C6
58
Action - Biceps Brachii
Flex the elbow Supinate the forearm Flex the shoulder
59
Origin - Biceps Brachii
Short head: Coracoid process of scapula | Long head: Supraglenoid tubercle of scapula
60
Insertion - Biceps Brachii
Tuberosity of the radius and aponeurosis of the biceps brachii
61
Nerve - Biceps Brachii
Musculocutaneous C5, C6
62
Action - Triceps Brachii
All heads: Extend the elbow Long head: Extend the shoulder ADduct the shoulder
63
Origin - Triceps Brachii
Long head: Infraglenoid tubercle of the scapula Lateral head: Posterior surface of proximal half of the humerus Medial head: Posterior surface of distal half of the humerus
64
Insertion - Triceps Brachii
Olecranon process of ulna
65
Nerve - Triceps Brachii
Radial C6, C7, C8, T1
66
Action - Coracobrachialis
Flex the shoulder | ADduct the shoulder
67
Origin - Coracobrachialis
Coracoid process of the scapula
68
Insertion - Coracobrachialis
Medial surface of mid-humeral shaft
69
Nerve - Coracobrachialis
Musculocutaneous C6, C7

Anatomy 1 (4 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions