Rotator Cuff and arm

Question 0

Insertion of deltoid

Answer 0

Deltoid tuberosity of humerus

Question 1

Origin of deltoid

Answer 1

Spine of scapula, acromion, lateral end of clavicle

Question 2

Innervation of deltoid

Answer 2

Axillary nerve C5,C6

Question 3

Action of deltoid

Answer 3

Anterior: flexes and medially rotates shoulder joint
Middle: abducts shoulder joint
Posterior: extens and laterally rotates shoulder joint

Question 4

Origin of supraspinatus

Answer 4

Supraspinous fossa of scapula

Question 5

Insertion of supraspinatus

Answer 5

Superior facet of greater tubercle

Question 6

Innervation of supraspinatus

Answer 6

Suprascapular nerve C4,C5,C6

Question 7

Action of supraspinatus

Answer 7

Initiates and assists deltoid in abduction of shoulder joint

Question 8

Origin of infraspinatus

Answer 8

Infraspinatus fossa of scapula

Question 9

Insertion of infrapsinatus

Answer 9

Middle facet of greater tubersity

Question 10

Innervation of infraspinatus

Answer 10

Suprascapular C5 C6

Question 11

Action of infraspinatus

Answer 11

Laterally rotates shoulder joint and helps hold humerus head and glenoid cavity of scapula

Question 12

Origin of teres minor

Answer 12

Middle part of lateral border of scapula

Question 13

Insertion of teres minor

Answer 13

Inferior facet of greater tuberosity

Question 14

Innervation of teres minor

Answer 14

Axillary nerve C5 C6

Question 15

Action of teres minor

Answer 15

Laterally rotate shoulder joint and helps hold humeral head in glenoid cavity of scapula

Question 16

Origin of teres major

Answer 16

Inferior part of lateral border of scapula and posterior surface of inferior angle of scapula

Question 17

Insertion of teres major

Answer 17

Medial lip of intertubercular sulcus of humerus

Question 18

Innervation of teres major

Answer 18

Lower subscapular nerve C5 C6

Question 19

Action of teres major

Answer 19

Adducts and medially rotates shoulder joint

Question 20

Origin of subscapularis

Answer 20

Subscapular fossa

Question 21

Insertion of subscapularis

Answer 21

Lesser tubercle of humerus

Question 22

Innervation of subscapularis

Answer 22

Upper and lower subscapular nerve C5, C6, C7

Question 23

Action of subscapularis

Answer 23

Medially rotates and adducts shoulder joint, helds head of humerus of cavity

Question 24

Origin of the pectoralis major

Answer 24

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 25

Insertion of pectoralis major

Answer 25

Lateral lip of intertubercle groove

Question 26

Innervation of pectoralis major

Answer 26

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

Question 27

Actions of pectoralis major

Answer 27

Adducts and medially rotates shoulder joint, draws scapula anteriorly and inferiorly

Question 28

Origin of pectoralis minor

Answer 28

3-5th ribs near costal cartilage

Question 29

Insertion of pectoralis minor

Answer 29

Medial border and superior surface of coracoud process of scapula

Question 30

Innervation of pectoralis minor

Answer 30

Medial pectoralis nerve C8, T1

Question 31

Actions of pectoralis minor

Answer 31

Stabilizies scapula by drawing inferiorly and anteriorly against thoracic wall

Question 32

Origin of subclavious

Answer 32

Junction of 1st rib and cartilage

Question 33

Insertion of subclavius

Answer 33

Inferior surface of middle third of clavicle

Question 34

Innervation of subclavius

Answer 34

Subclavian nerve C5 and C6

Question 35

Action of subclavius

Answer 35

Anchors and depresses clavicle

Question 36

Origin of serratus anterior

Answer 36

External surface of lateral parts of 1st | -8th rib

Question 37

Insertion of serratus anterior

Answer 37

Anterior surface of medial border of scapula

Question 38

Innervation of serratus anterior

Answer 38

Long thoracic nerve C5, C6, C7

Question 39

Action of serratus anterior

Answer 39

Protracts scapula and holds against thoracic wall and rotates scapula

Question 40

Origin of biceps brachii

Answer 40

Short head: tip of coracoid process of scapula | Long head: supraglenoid tubercle of scapula

Question 41

Insertion of biceps brachii

Answer 41

Tuberosity of radius and fascia of forearm via bicipital aponeurosis

Question 42

Innervation of biceps brachii

Answer 42

Musculocutaneous nerve C5 and C6

Question 43

Action of biceps brachii

Answer 43

Supinates forearm and when it is supinated, flexes elbow joint, flexes shoulder joint, short head resist dislocation of shoulder

Question 44

Origin of brachialis

Answer 44

Distal half of anterior surface of humerus

Question 45

Insertion of brachialis

Answer 45

Coronoid process and tuberosity of ulna

Question 46

Innervation of brachialis

Answer 46

Musculocutaneous C5 and C6

Question 47

Action of brachialis

Answer 47

Flexes elbow joint in all positions

Question 48

Origin of coracobrachialis

Answer 48

Tip of coracoid process of scapula

Question 49

Insertion or coracobrachialis

Answer 49

Middle third of medial surface of humerus

Question 50

Innervation of coracobrachialis

Answer 50

Musculocutaneous nerve C5,6,7

Question 51

Action of coracobrachialis

Answer 51

Helps flex and adduct shoulder joint, resists dislocation of shoulder

Question 52

Origin of tricpeps brachii

Answer 52

Long head: infraglenoid tubercle of scapula Lateral head: posterior surface of humerus, superior to radial groove Medial head: posterior surface of humerus, inferior to radial groove

Question 53

Insertion of triceps brachii

Answer 53

Proximal end of olecranon of ulna and forearm fascia

Question 54

Innervation of triceps brachii

Answer 54

Radial nerve C6,7,8

Question 55

Action of triceps brachii

Answer 55

Cheif extensor of elbow joint, long head extends shoulder joint and resists dislocation of humerus