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Trail Guide To The Body Ch. 1-7 > Ch. 2 - Shoulder & Arm > Flashcards

Ch. 2 - Shoulder & Arm Flashcards

1
Q

Glenohumeral joint is made up of the:

A

Scapula and humerus
(Ball & socket joint)

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2
Q

The sternoclavicular joint:

A

Is made up of the sternum and clavicle
(movement for lifting arm)

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3
Q

Acromioclavicular joint:

A

Acromion + clavicle

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4
Q

What is a tubercle?

A

Smaller bump than fossa

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5
Q

What are the rotator cuff muscles?

A

Supraspinatus
Infraspinatus
Teres minor
Subscapularis

(SITS)

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6
Q

Where is the brachial artery located?

A

Runs between biceps and triceps brachii; can be felt in between these muscles on the medial side

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7
Q

Agonist muscles on shoulder flexion:

A

Deltoid (anterior fibers)
Pectoralis major (upper fibers)
Biceps brachii
Coracobrachilias

(Antagonists on extension)

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8
Q

Agonist muscles on extension:

A

Deltoid (posterior fibers)
Latissimus dorsi
Teres major
Pectoralis major (lower fibers)
Triceps brachii (long head)

(Antagonists on flexion)

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9
Q

Agonist muscles on shoulder horizontal abduction

A

Deltoid (posterior fibers)

(Antagonist on adduction)

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10
Q

Agonist muscles on shoulder horizontal adduction

A

Deltoid (anterior fibers)
Pectoralis major (upper fibers)

(Antagonists on horizontal abduction)

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11
Q

Agonists on shoulder abduction

A

Deltoid
Supraspinatus

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12
Q

Agonists on shoulder adduction

A

Latissimus dorsi
Teres major
Infraspinatus
Teres minor
Pectoralis major
Triceps brachii
Coracobrachialis

(Antagonists on abduction)

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13
Q

Agonists on lateral rotation of shoulder:

A

Deltoid (posterior fibers)
Infraspinatus
Teres minor

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14
Q

Agonist muscles on medial rotation of shoulder:

A

Deltoid (anterior fibers)
Latissimus dorsi
Teres major
Subscapularis
Pectoralis major

(Antagonists on lateral rotation)

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15
Q

What muscle is the most superficial in the back/shoulder?

A

Trapezius

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16
Q

Supra:

A

Above

17
Q

Deltoid

A

Actions:
(All fibers)
Abduct shoulder

(Anterior fibers)
Flex shoulder
Medically rotate shoulder
Horizontally adduct shoulder

(Posterior fibers)
Extend shoulder
Laterally rotate shoulder
Horizontally abduct shoulder

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

Insertion:
Deltoid tuberosity

18
Q

Trapezius

A

Actions:

(Upper fibers)

Bilaterally Extend head and neck
(Unilaterally)
- laterally flex head to same side
- rotate head to opposite side
- Elevate scapula
- upwardly rotate scapula

(Middle fibers)
- adduct scapula
- stabilize scapula

(Lower fibers)
- depress scapula
- upwardly rotate scapula

Origin:
External occipital protuberance, medial portion of superior nuchal line of occiput, ligamentum nuchae, spinous processes of c-7 through t-12

Insertion:
Lateral 1/3 of clavicle, acromion, spine of the scapula

19
Q

Latissimus dorsi

A

Actions:

Extend shoulder
Adduct shoulder
Medially rotate shoulder

Origin:
Inferior angle of scapula, spinous processes of last six thoracic vertebrae, last three or four ribs, thoracolombar fascia, and posterior iliac crest

Insertion:
Intertubercular groove of the humerus

20
Q

Teres major

A

Actions:
Extend shoulder
Adduct shoulder
Medially rotate shoulder

Origin:
Inferior angle and lower 1/3 of lateral border of scapula

Insertion:
Crest of lesser tubercle of humerus

21
Q

Supraspinatus

A

Action:
Abduct shoulder
Stabilize head of humerus

Origin:
Supraspinous fossa of scapula

Insertion:
Greater tubercle of humerus

22
Q

Infraspinatus

A

Action:
Laterally rotate shoulder
Adduct shoulder
Stabilize head of humerus

Origin:
Infraspinous fossa of scapula

Insertion:
Greater tubercle of humerus

23
Q

Teres minor

A

Action:
Laterally rotate shoulder
Adduct shoulder
Stabilize head of humerus

Origin:
Upper 2/3 of lateral border of scapula

Insertion:
Greater tubercle of humerus

24
Q

Subscapularis

A

Action:
Medially rotate shoulder
Stabilize head of humerus

Origin:
Subscapular fossa of scapula

Insertion:
Lesser tubercle of humerus

25
Q

Rhomboid major

A

Action:
Adduct scapula
Elevate scapula

Origin:
Spinous processes of t-2 to t-5

Insertion:
Medial border of scapula between the spine of the scapula and the inferior angle

26
Q

Rhomboid minor

A

Actions:
Adduct scapula
Elevate scapula
Downwardly rotate scapula

Origin:
Spinous processes of c-7 and t-1

Insertion:
Upper portion of medial border of scapula

27
Q

Levator scapula

A

Actions:

(Unilaterally)
Elevate scapula
Downward rotate scapula
Laterally flex head and neck
Rotate head to same side

(Bilaterally)
Extend neck/head

Origin:
Transverse processes of c-1 through c-4

28
Q

Serratus anterior

A

Actions:
Abduct scapula
Upward rotate scapula
Depress scapula

Origin:
External surfaces of upper eight or nine ribs

Insertion:
Anterior surface of medial border of scapula

29
Q

Pectoralis major

A

Actions:

(All fibers)
Adduct shoulder
Medially rotate shoulder
Elevate thorax

(Upper fibers)
Flex shoulder
Horizontally adduct shoulder

(Lower fibers)
Extend shoulder

Origin:
Medial half of clavicle, sternum, and cartilage of first through sixth ribs

Insertion:
Crest of greater tubercle of humerus

30
Q

Pectoralis minor

A

Actions:
Depress scapula
Abduct scapula
Downwardly rotate scapula

Origin:
Third, fourth, and fifth ribs

Insertion:
Medial surface of coracoid process of scapula

31
Q

Biceps brachii

A

Action:
Flex elbow
Supinate forearm
Flex shoulder

Origin:

Short head - coracoid process of scapula

Long head - supraglenoid tubercle of scapula

Insertion:
Tuberosity of the radius and aponeurosis of biceps brachii

32
Q

Triceps brachii

A

Actions:
(All heads)
Extend elbow

(Long head)
Extend shoulder
Adduct shoulder

Origin:
Long head - infraglenoid tubercle of scapula
Lateral head - posterior surface of proximal half of humerus
Medial head - posterior surface of distal half of humerus

Insertion:
Olecranon process of ulna

33
Q

Coracobrachialis

A

Action:
Flex shoulder
Adduct shoulder

Origin:
Coracoid process of scapula

Insertion:
Medial surface of mid-humeral shaft

Trail Guide To The Body Ch. 1-7 (10 decks)

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