Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

KN 251 > Muscles of the Shoulder > Flashcards

Muscles of the Shoulder Flashcards

1
Q

These muscles cross the shoulder joint to insert in the arm and therefore actually move the arm.

A

Muscles of the shoulder

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

The 6 intrinsic shoulder muscles

A

Deltoid, Infraspinatus, subscapularis, supraspinatus,teres major, teres minor

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

Large fan shaped muscle that covers superior part of thorax

A

Pectoralis Major

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

Muscle of the shoulder that has two heads, on clavicular and one sternum forming the anterior wall of the axilla (anterior axillary wall)

A

Pectoralis Major

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

This muscle is a powerful adductor of the arm and medial rotator of the humerus, and its two parts can activate separately

A

Pectoralis Major

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

Originates at clavicle, sternum, and ribs 1-6 cartilage

Inserts into intertubercular sulcus of the humerus

A

Pectoralis Major

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

Innervated by the lateral and medial pectoral nerves, which arise from the brachioplexus

A

Pectoralis Major

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

Flexus, adducts, and rotates the humerus medially

A

Pectoralis Major

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

Widest muscle on the posterior side of the thorax, covers half of back (trunk) and inserts into the humerus

A

Latissimus Dorsi

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

Forms the posterior axillary fold

A

Latissimus Dorsi

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

Extends, Retracts, and rotates the humerus medially

Ex: touching scapula on the opposite side

A

Latissimus Dorsi

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

Powerful adductor of the humerus when working with the pectoralis major.

Ex: Important in restoring the upper limb to the shoulder from an abducted position like in climbing

A

Latissimus Dorsi

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

Raises the trunk to the arm like pullups

A

Latissimus Dorsi

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

Originates at thoracolumbar, or lumbardorsal fascia

A

Latissimus Dorsi

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

A wide band of fascia, like an aponeurosis that originates of spinous processes of T7-T12, the lumbar vertabrae, iliac crest, and sometimes the inferior angle of the scapula

A

Lumbodorsal Fascia

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

Inserts into intertubercular groove of the humerus

A

Latissimus Dorsi

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

Innervated by the thoracodorsal nerve

A

Latissimus Dorsi

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

Extends retracts and rotates the humerus medially and is a powerful adductor and depresses the shoulder

A

Latissimus Dorsi

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

Good area to hear the lungs because its not covered by muscle, good for identifying muscles

A

Triangle of Ausculation

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

Rounded part of the shoulder, shaped like triangle, divided into three parts

A

Deltoid

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

Anterior fibers in deltoid aid the pectoralis major in

A

flexing the arm and medial rotation

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

Posterior fibers of deltoid aid the latissimus dorsi with

A

extending the arm and lateral rotation

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

Posterior and anterior fibers do what to the arm while walking?

A

Swings the arm

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

Stabilizes the shoulder joint by holding the head of the humerus in the glenoid cavity during shoulder movement

A

Deltoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

Involved in abductory movement esp avove 15 degrees

A

Deltoid

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Axillary nerve runs deep to it from behind

A

Deltoid

27
Q

Originates from the lateral one third of clavicle, acromion process, and the lateral aspect of the spine of the scapula

Inserts into deltoid tuberosity on humerus

A

Deltoid

28
Q

Muscle that is trianglular and fills in the subscapular fossa and inserts into the lesser tubercle

A

Subscapularis

29
Q

This rotator cuff muscle is the primary medial rotator of the arm

A

Subscapularis

30
Q

Rotator cuff muscles do what to the humerus in the glenoid cavity?

A

Hold the head inside of it

31
Q

Helps to form part of posterior axillary fold along with latissimus dorsi

A

Subscapularis

32
Q

Origin is from the deep side of the scapula - the subscapular fossa (costal surface of the scapula) and inserts and at the lesser tubercle

A

Subscapularis

33
Q

Inervated by the subscapular nerve

A

Subscapularis

34
Q

Occupies the supraspinous fossa and inserts into the greater tubercle of the humerus

A

Supraspinatous

35
Q

To view this muscle, the trapezius and the deltoid must be reflected

A

Supraspinatus

36
Q

Muscle that initiates abduction until 15 degrees away from body.

A

Supraspinatus

37
Q

Origin is supraspinous fossa and insertion is in the greater tubercle of the humerus.

A

Supraspinatus

38
Q

Innervated by the suprascapular nerve

A

Supraspinatus

39
Q

Also helps to stabilize the shoulder during rotation

And prevents downward dislocation of the humerus when carrying a suitcase

A

Supraspinatus

40
Q

Muscle that occupies the infraspinous fossa and inserts into the greater tubercle of the humerus.

A

Infraspinatus

41
Q

Also must reflect the deltoid and the trapezius for this muscle

A

Infraspinatus

42
Q

A powerful lateral rotator of the humerus

Originates from infraspinus fossa of the scapula and inserts in the greater tubercle just posterior to the supraspinatus

A

Infraspinatus

43
Q

Innervated by the suprascapular nerve

A

Infraspinatus

44
Q

Narrow muscle that is not distinct from infraspinatus having the same action as the infraspinatus

A

Teres Minor

45
Q

Origin is on the lateral border of the posterior surface of the scapula and insertion is on the greater tubercle, posterior to the infraspinatus

A

Teres minor

46
Q

Innervated by the axillary nerve and has same action as infraspinatus (rotates laterally and stabilizes)

A

Teres minor

47
Q

Rotator cuff muscles can also be called

A

Scapulohumeral muscles

48
Q

Have a steadying effect on the head of the humerus and rotate in the glenohumeral joint

A

Rotator Cuff

49
Q

All muscles of rotator cuff help rotate the humerus except the…

A

supraspinatus

50
Q

All 4 rotator cuff muscles do this to hold the humeral head

A

Tonic contraction

51
Q

The most commonly injured injury occurs with the…

A

Supraspinatus

52
Q

Tearing of this muscle may follow dislocation of the humerus and

degenerative tendonitis is common in older people

ex of injury: Violently pushing into abduction like checking a shoulder into a board or throwing the ball hard or swimming.

A

rotator cuff muscle

53
Q

To diagnose, person is asked to lower their arm from a 90 degree angle. If injured, limb will quickly drop to the side.

A

Rotator cuff muscle

54
Q

Thick cylinder shaped muscle, forms rounded area on the inferior lateral third of scapula when arm is abducted against resistance and helps form posterior axillary fold with the latissimus dorsi

A

Teres Major

55
Q

Adducts and medially rotates the arm and is important stabilizer of humeral head by holding it in place against the pull of the deltoid

A

Teres Major

56
Q

Originates off the posterior surface of the scapula along the inferior angle and nserts into the intertubercular sulcus of the humerus and the tendon fuses with the latissimus dorsi

A

Teres Major

57
Q

Innervated by the subscapular nerve

A

Teres Major

58
Q

Adducts extends and medially rotates the arm, like the lattisimus dorsi

A

Teres major

59
Q

Name the three muscles that insert in the intertubercular sulcus. There is a major on both sides.

A 
Pectoralis Major (laterally)
Latissimus Dorsi (intermediate)
Teres Major (medial)
60
Q

Extends from the corocoid process to the brachium

A

Coracobrachialis

61
Q

The musculocutaneous nerve runs right through it

A

Coracobrachialis

62
Q

Originates from the corocoid process and inserts on medial surface of the humerus.

A

Coracobrachialis

63
Q

Flexes and adducts the arm

A

Coracobrachialis

KN 251 (17 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions