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1

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

Muscles of the shoulder

2

The 6 intrinsic shoulder muscles

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

3

Large fan shaped muscle that covers superior part of thorax

Pectoralis Major

4

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

Pectoralis Major

5

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

Pectoralis Major

6

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

Inserts into intertubercular sulcus of the humerus

Pectoralis Major

7

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

Pectoralis Major

8

Flexus, adducts, and rotates the humerus medially

Pectoralis Major

9

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

Latissimus Dorsi

10

Forms the posterior axillary fold

Latissimus Dorsi

11

Extends, Retracts, and rotates the humerus medially

Ex: touching scapula on the opposite side

Latissimus Dorsi

12

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

Latissimus Dorsi

13

Raises the trunk to the arm like pullups

Latissimus Dorsi

14

Originates at thoracolumbar, or lumbardorsal fascia

Latissimus Dorsi

15

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

Lumbodorsal Fascia

16

Inserts into intertubercular groove of the humerus

Latissimus Dorsi

17

Innervated by the thoracodorsal nerve

Latissimus Dorsi

18

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

Latissimus Dorsi

19

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

Triangle of Ausculation

20

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

Deltoid

21

Anterior fibers in deltoid aid the pectoralis major in

flexing the arm and medial rotation

22

Posterior fibers of deltoid aid the latissimus dorsi with

extending the arm and lateral rotation

23

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

Swings the arm

24

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

Deltoid

25

Involved in abductory movement esp avove 15 degrees

Deltoid

26

Axillary nerve runs deep to it from behind

Deltoid

27

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

Deltoid

28

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

Subscapularis

29

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

Subscapularis

30

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

Hold the head inside of it