8: Shoulder Girdle & Shoulder Muscles

Question 1

muscles that move the scapula

Answer 1

muscles of the shoulder girdle

Question 2

muscles anterior of scapula (SPS)

Answer 2

Subclavius, Pectoralis Minor, Serratus Anterior

Question 3

Subclavius OIA

Answer 3

O: 1st rib;
I: clavicle;
A: depresses clavicle, stabilizes shoulder girdle

Question 4

Pectoralis Minor OIA

Answer 4

O: ribs 3-5;
I: coracoid process of scapula;
A: depression, downward rotation, protraction

Question 5

assists in drawing the shoulder forward and downward, also to stabilize the shoulder girdle

Answer 5

pec minor

Question 6

Serratus Anterior OIA

Answer 6

O: ribs 1-9;
I: anterior vertebral border of SCAPULA;
A: protraction, upward rotation

Question 7

known as the “boxer’s muscle” because it helps with horizontal arm movement like punching and pushing during horizontal adduction

Answer 7

serratus anterior

Question 8

Levator Scapulae OIA

Answer 8

O: C1-C4;
I: vertebral border of SCAPULA;
A: elevation, assists in retraction and downward rotation

Question 9

Rhomboids (Major and Minor) OIA

Answer 9

O: C7-T5;
I: vertebral border of SCAPULA;
A: retraction, downward rotation, elevation

Question 10

Trapezius OIA

Answer 10

O: occipital protuberance to C7-T12;
I: lateral 1/3 of CLAVICLE, acromion process of SCAPULA, spine of SCAPULA;
A: elevation/depression, retraction, upward rotation

Question 11

action of Trap 1 (superior part)

Answer 11

elevation

Question 12

action of Trap 2 & 3 (middle part)

Answer 12

retraction

Question 13

action of Trap 4 (inferior part)

Answer 13

depression and upward rotation

Question 14

muscles posterior of scapula (LRT)

Answer 14

Levator Scapulae, Rhomboids, Trapezius

Question 15

Which muscles perform scapula elevation

Answer 15

levator scapulae and trapezius

Question 16

which muscles perform scapula depression

Answer 16

trapezius and pec minor

Question 17

which muscles perform scapula retraction

Answer 17

trapezius and rhomboids

Question 18

which muscles perform scapula protraction

Answer 18

serratus anterior and pec minor

Question 19

which muscles perform scapula upward rotation

Answer 19

trapezius and serratus anterior

Question 20

which muscles perform scapula downward rotation

Answer 20

pec minor and rhomboids

Question 21

what type of joint is the shoulder

Answer 21

triaxial

Question 22

superior shoulder joint muscles

Answer 22

deltoid and supraspinatus

Question 23

Anterior Deltoid OIA

Answer 23

O: lateral 1/3 CLAVICLE;
I: deltoid tuberosity;
A: flexion, internal rotation, horizontal adduction

Question 24

Middle Deltoid OIA

Answer 24

O: acromion process;
I: deltoid tuberosity;
A: abduction

Question 25

Posterior Deltoid OIA

Answer 25

O: spine of scapula; I: deltoid tuberosity; A: extension (hyper), external rotation, horizontal abduction

Question 26

superficial muscle that is a common site for injections

Answer 26

deltoid

Question 27

Supraspinatus OIA

Answer 27

O: supraspinous fossa of scapula; I: greater tuberosity of humerus; A: adduction, stabilization

Question 28

very deep muscle. when torn, pain is deep in the shoulder and gets worse as you try to abduct your arm. considered primary initiator of abduction until 30 deg

Answer 28

supraspinatus

Question 29

anterior shoulder joint muscles

Answer 29

coracobrachialis, pectoralis major, subscapularis

Question 30

Coracobrachialis OIA

Answer 30

O: coracoid process of scapula; I: anteromedial surface of humerus; A: flexion, adduction

Question 31

Pectoralis Major OIA

Answer 31

O: clavicle, sternum; I: lateral lip of intertubercular groove; A: adduction, internal rotation, flexion, horizontal adduction

Question 32

Subscapularis OIA

Answer 32

O: subscapular fossa of scapula; I: lesser tuberosity of humerus; A: internal rotation, stabilization

Question 33

posterior shoulder joint muscles

Answer 33

teres major, teres minor, latissimus dorsi, infraspinatus

Question 34

Teres Major OIA

Answer 34

O: posterior lower 1/3 of axillary border of scapula; I: medial lip of intertubercular groove; A: internal rotation, adduction, extension (hyper)

Question 35

Latissimus Dorsi OIA

Answer 35

O: T7-L5, iliac crest; I: intertubercular groove; A: adduction, internal rotation, extension (hyper)

Question 36

known as the "swimmer's muscle" because it is important in shoulder extension during the power stroke

Answer 36

latissimus dorsi

Question 37

Infraspinatus OIA

Answer 37

O: infraspinous fossa of scapula; I: greater tuberosity; A: external rotation, horizontal abduction, stabilization

Question 38

Teres Minor OIA

Answer 38

O: upper 2/3 of axillary border of scapula; I: greater tuberosity; A: external rotation, stabilization

Question 39

located more lateral and inferior to the infraspinatus

Answer 39

teres minor

Question 40

Rotator Cuff Muscles (SITS)

Answer 40

Supraspinatus, Infraspinatus, Teres Minor, Subscapularis

Question 41

where do all rotator cuff muscles insert

Answer 41

humerus

Question 42

rotator cuff muscles generate force needed by contracting _________ to throw something, and apply braking action through ________ contraction

Answer 42

concentrically, eccentric

Question 43

Biceps Brachii OIA

Answer 43

O: (long head)-supraglenoid tubercle of scapula, (short head)-coracoid process; I: radial tuberosity; Action: elbow and shoulder flexion, supination

Question 44

biarticular elbow muscles

Answer 44

biceps brachii and triceps brachii

Question 45

Triceps Brachii OIA

Answer 45

O: (long head)- infraglenoid tubercle of scapula, (lateral head)- upper lateral-posterior 1/2 of humerus, (medial head)- lower 2/3 of medial posterior humerus; I:olecranon process; A: elbow and shoulder extension