Muscles Pec and Axilla region

Question 1

Deltoid Origin

Answer 1

Lateral third of clavicle, wraps around arcomion to the spine of scapula

Question 2

Deltoid Insertion

Answer 2

Deltoid tuberosity of humerus

Question 3

Deltoid Innervation

Answer 3

Axillary nerve

Question 4

Deltoid Action

Answer 4

1) Clavicular (anterior) part: flexes and medially rotates the arm
2) Acromial (middle) part: abducts the arm (15-90)
3) Spinal (posterior) part: extends and laterally rotates the arm

Question 5

Deltoid Blood Supply

Answer 5

Deltoid branch of thoracoacromial artery

Question 6

Pectoralis Major Origin

Answer 6

Clavicular head: medial half of clavicle

Sternocostal head: anterior surface of sternum, superior 6 costal cartilages

Question 7

Pectoralis Major Insertion

Answer 7

Lateral lip of intertubercular groove of humerus

Question 8

Pectoralis Major Innervation

Answer 8

Lateral and medial pectoral nerves

Question 9

Pectoralis Major Action

Answer 9

1) Adducts arm
2) Medially rotation
3) flexion of arm

Question 10

Pectoralis Major Blood Supply

Answer 10

Pectoral branch of thoracoacromial trunk

Question 11

Pectoralis Minor Origin

Answer 11

Ribs 3-5 near costal cartilage

Question 12

Pectoralis Minor Insertion

Answer 12

coracoid process of scapula

Question 13

Pectoralis Minor Innervation

Answer 13

Medial Pectoral Nerve

Question 14

Pectoralis Minor Action

Answer 14

1) Stabilize scapula
2) draw scapula anteriorly
3) Elevate ribs

Question 15

Pectoralis Minor Blood Supply

Answer 15

Pectoral branch of thoracoacromial trunk

Question 16

Subclavius Origin

Answer 16

Rib 1 close to costal cartilage

Question 17

Subclavius Insertion

Answer 17

Inferior surface of clavicle (so you can’t see it)

Question 18

Subclavius Innervation

Answer 18

Subclavius Nerve

Question 19

Subclavius Action

Answer 19

1) Anchor clavicle
2) Protect deeper neurovascular
3) Prevent dislocation of clavicle
4) Depress clavicle

Question 20

Subclavius Blood Supply

Answer 20

Clavicular branch of thoracoacromial artery and suprascapular artery

Question 21

Serratus Anterior Origin

Answer 21

lateral border of ribs 1-8

Question 22

Serratus Anterior Insertion

Answer 22

medial border of scapula

Question 23

Serratus Anterior Innervation

Answer 23

Long thoracic nerve

Question 24

Serratus Anterior Action

Answer 24

1) protracts scapula (give yourself a hug)
2) rotates scapula superiorly
3) stabilize scapula against thoracic wall

Question 25

Serratus Anterior Blood Supply

Answer 25

Circumflex scapular artery