Muscles of The Shoulder & Arm Group 2

Question 1

Deltoid (Anterior)

Answer 1

Action:
Flexes Humerus
Medially Rotates

Origin:
Lateral Clavicle
Spine of Scapula
Acromion Process

Insertion:
Deltoid Tuberosity

Question 2

Deltoid (Middle)

Answer 2

Action:
Abducts humerus

Origin:
Lateral Clavicle
Spine of Scapula
Acromion Process

Insertion:
Deltoid Tuberosity

Question 3

Deltoid (Posterior)

Answer 3

Action:
Laterally rotates humerus
Extends Humerus

Origin:
Lateral Clavicle
Spine of Scapula
Acromion Process

Insertion:
Deltoid Tuberosity

Question 4

Pectoralis Major

Answer 4

Action:
Flexes
Horizontally Flexes
Extends

Origin:
Media Clavicle
Costal Sternum
Cartilage of Ribs 1 - 7

Insertion:
Lateral Lip

Question 5

Supraspinatus

Answer 5

Action:
Abducts the Humerus at GH
Flexes

Origin:
Super spinous fossa

Insertion:
Greater Tubercle of Humerus
Superior facet

Question 6

Infraspinatus

Answer 6

Action:
Laterally Rotates

Origin:
Infraspinous fossa of Scapula

Insertion:
Greater Tubercle of Humerus

Question 7

Teres Minor

Answer 7

Action:
Laterally rotates Humerus
Abducts Humerus

Origin:
Superior 2/3 of Lateral Boarder of Scapula

Insertion:
Greater Tubercle of Humerus

Question 8

Subscapularis

Answer 8

Action:
Medially rotates the humerus

Origin:
subscapular fossa of Scapula

Insertion:
Lesser Tubercle of Humerus

Question 9

Teres Major

Answer 9

Action:
Medially Rotates
abducts arm
extends arm

Origin:
Inferior angle Lateral boarder
of the Scapula

Insertion:
Intertubercle groove of the Humerus

Question 10

Latisimus Dorsi

Answer 10

Action:
Medially rotes
Abducts
extends

Origin:
Spinous process T7 - L5

Insertion:
Medial Lip of bicipital groove of humerus

Question 11

Coracobrachialis

Answer 11

Action:
Flexes at GH Joint
abducts at GH Joint

Origin:
Coracoid Process

Insertion:
Medial shaft of humerus