Deltoid Muscle

Origin:

1.❌ ❌ of the ❌
2. ❌ of the ❌
3. ❌ of the ❌

Insertion: Deltoid tuberosity

Action:

Anterior fibers: ❌, ❌, ❌, & ❌
Middle fibers: abduction

Posterior fibers: Posterior fibers: abduction, ❌, ❌, & ❌

Pectoralis Major

Origin:
1.❌ of the ❌ of the ❌
2. ❌ of the ❌ of the ❌
3. ❌ of the ❌

Insertion:
1. ❌ 2 or 3 inches wide to ❌ of the ❌ of the humerus

Action:

1.Upper fibers (clavicular head): ❌ rotation, ❌ adduction, ❌, ❌ (once arm is ❌, upper fibers assist in further abduction), & ❌ (with arm ❌)

2. Lower fibers (sternal head): ❌, ❌, ❌, & adduction

Latissimus Dorsi

Origin:

1. ❌ of the ❌
2. ❌ and spinous processes of ❌ and ❌ vertebrae
3. Slips from the ❌

Insertion: ❌ of the ❌ of the humerus

Actions:

1.❌
2.❌
3. ❌
4.❌

Teres Major

Origin: The ❌ of the ❌ of the ❌

Insertion: The ❌ of the ❌ of the humerus

Action:

1. ❌, particularly from the ❌ to the ❌
2.Internal rotation
3.❌, particularly from the ❌ down to the side & toward midline of body

Coracobrachialis Muscle

Origin: ❌

Insertion: ❌ of the ❌ of the humeral shaft

Action:

1. ❌
2. ❌
3. ❌

Subscapularis Muscle

Origin: ❌ surface of the subscapular fossa

Insertion: ❌ tubercle of the humerus

Action:

1.❌
2. ❌
3.❌
4.❌ of the humeral ❌

Supraspinatus

Origin: ❌ of the supraspinatus fossa

Insertion: ❌ on the greater tubercle of the humerus

Action:

1.❌
2. ❌ of the humeral ❌

Infraspinatus Muscle

Origin: ❌ of the scapula just ❌
Insertion: ❌ on the ❌

Action:

1.❌
2. ❌
3.❌
4. ❌ of humeral head in the ❌

Teres Minor

Origin: ❌, ❌

Insertion: ❌ of humerus on the ❌

Action:

1.❌
2.❌
3.❌
4.❌ of humeral head in the ❌