Pectoral region and breast

Question 1

Deltoid origin

Answer 1

Lateral 1/3 clavicle, spine of scapula and acromion

Question 2

Deltoid insertion

Answer 2

Deltoid tuberosity

Question 3

Deltoid Action

Answer 3

Spinal: Lateral rotation and extension
Acromial: Abduction
Clavicular: Medial rotation and flexion

Question 4

Deltoid innervation

Answer 4

Axillary nerve (CN 5,6)

Question 5

Deltoid Arterial Supply

Answer 5

Thoracoacromial artery, circumflex scapular artery, and anterior and posterior circumflex humeral artery

Question 6

Pectoralis Major origin

Answer 6

Clavicular head: anterior surface of medial
half of clavicle
Sternocostal head: anterior surface of sternum,
superior six costal cartilages, aponeurosis of
external oblique muscle

Question 7

Pectoralis Major Insertion

Answer 7

lateral lip of intertubercular sulcus of the
humerus

Question 8

Pectoralis Major Innervation

Answer 8

lateral and medial pectoral nerves,
clavicular head (C5, C6), sternocostal head (C7, C8,
T1)

Question 9

Pectoralis Major Action

Answer 9

adducts and medially rotates shoulder joint,
draws scapula anteriorly and inferiorly
Clavicular head – flexes shoulder
Sternocostal head – extend from the flexed position

Question 10

Pectoralis Major Arterial supply

Answer 10

Superior and Lateral thoracic artery, internal thoracic artery, and pectoral branches of thoracoacromial artery

Question 11

Pectoralis Minor Origin

Answer 11

3-5th ribs near costal cartilages

Question 12

Pectoralis Minor Insertion

Answer 12

Medial border and the superior surface of the coracoid process

Question 13

Pectoralis Minor Innervation

Answer 13

Median Pectoral Nerve (C8,T1)

Question 14

Pectoralis Minor Action

Answer 14

stabilizes scapula by drawing
inferiorly and anteriorly against
thoracic wall

Question 15

Pectoralis Minor Arterial Supply

Answer 15

Pectoral and deltoid
branches of thoracoacromial
artery, superior and lateral thoracic
arteries

Question 16

Subclavius Origin

Answer 16

Junction of 1st rib and its costal cartilage

Question 17

Subclavius Insertion

Answer 17

Inferior surface middle third of clavicle

Question 18

Subclavian Innervation

Answer 18

Subclavian Nerve (C5,C6)

Question 19

Subclavian Action

Answer 19

Anchors and depresses clavicle

Question 20

Subclavian Arterial Supply

Answer 20

clavicular branch
of thoracoacromial artery and
suprascapular artery

Question 21

Serratus Anterior Origin

Answer 21

External Surface of the lateral parts of ribs 1-8

Question 22

Serratus Anterior Insertion

Answer 22

Anterior surface of medial border of scapula

Question 23

Serratus Anterior Innervation

Answer 23

Long Thoracic Nerve (C5,C6,C7)

Question 24

Serratus Anterior Action

Answer 24

Protracts and rotates scapula

Question 25

Serratus Anterior Arterial Supply

Answer 25

Superior and lateral thoracic arteries, thoracodorsal artery

Question 26

Coracobrachialis origin

Answer 26

Coracoid process of scapula

Question 27

Coracobrachialis Insertion

Answer 27

middle third of medial surface of humerus

Question 28

Coracobrachialis Innervation

Answer 28

Musculocutaneous (C5,C6,C7)

Question 29

Coracobrachialis Action

Answer 29

Flex and adduct the shoulder, resist shoulder dislocation

Question 30

Coracobrachialis Arterial Supply

Answer 30

Brachial Artery and anterior circumflex humeral artery

Question 31

Biceps brachii Origin

Answer 31

Short head – tip of coracoid process of scapula Long head – supraglenoid tubercle of scapula

Question 32

Biceps brachii Insertion

Answer 32

Radial Tuberosity and bicipital aponeurosis

Question 33

Biceps brachii Innervation

Answer 33

Musculocutaneous nerve (C5,C6)

Question 34

Biceps brachii action

Answer 34

supinates forearm, flexes supinated elbow, Flexes shoulder short head – resists shoulder dislocation

Question 35

Biceps brachii Arterial Supply

Answer 35

Brachial artery and anterior circumflex humeral artery

Question 36

Platysma Origin

Answer 36

Pectoral Fascia

Question 37

Platysma Insertion

Answer 37

Inferior border of mandible

Question 38

Platysma Innervation

Answer 38

Cervical branches of facial nerve

Question 39

Platysma Action

Answer 39

Tenses skin of neck and depress mandible

Question 40

Platysma Arterial Supply

Answer 40

Submental and suprascapular artery