Muscle

Question 1

Origin of biceps brachii

Answer 1

Short head: coracoid process

Long head: supraglenoid tubercle of scapula

Question 2

Insertion of biceps brachii

Answer 2

Both muscle bellies join to form a flattened tendon inserted into the radial tuberosity

Question 3

Innervation of biceps brachii

Answer 3

Musculocutaneous

C5 C6

Question 4

Coracobrachialis origin

Answer 4

Coracois process of scapula

Question 5

Insertion of coracobrachialis

Answer 5

Inserts into middle of medial surface and border of the humerus

Question 6

Innervation of coracobrachialis

Answer 6

Musculocutaneous

C6,C7

Question 7

Brachialis muscle origin ?

Answer 7

Distal half of the anterior humerus

Question 8

Insertion of Brachialis muscle?

Answer 8

Tuberosity and anterior surface of the Coronoid process of the ulna

Question 9

Innervation of the Brachialis muscle?

Answer 9

Musculocutaneous nerve
C5,C6,
Also the radial nerve sends a minor branch to the Brachialis C7

Question 10

Triceps brachii muscle origin

Answer 10

Long head-infraglenoid tubercle
Lateral head-posterior surface of humerus
Medial head-posterior surface of humerus inferior to radial groove

Question 11

Triceps brachii insertion

Answer 11

All 3 heads insert by a common tendon into posterior portion of the proximal olecranon of the ulna

Question 12

Innervation of triceps brachii

Answer 12

Radial nerve C7,C8

Question 13

Anconeus muscle origin

Answer 13

Lateral epicondyle of the humerus

Question 14

Anconeus innervation

Answer 14

Radial nerve C7 C8

Question 15

Anconeus insertion

Answer 15

Lateral aspect of olecranon and into upper dorsal surface of the body of the ulna

Question 16

Origin of the Trapezius muscle

Answer 16

Medial 3rd of the Super nuchal line of occipital bone

Ligamentum nuchae

External occipital protuberance

Spinous processes of C7 and all 12 of thoracic vertebrae

Question 17

Insertion of Trapezius muscle

Answer 17

Superior:
Clavicle (Posterior lateral 3rd)

Middle: Acromion (medial margin)
              Scapular spine (posterior)

Inferior: scapular spine (aponeurosis)

Question 18

What is the innervation of the Trapezius

Answer 18

Cervical nerve XI
(Accessory nerve)

Proprioceptor nerves C3,C4

Question 19

Blood supply of Trapezius muscle

Answer 19

Superficial cervical artery

Question 20

Actions of Trapezius

Answer 20

Acts on SCAPULA

• rotation
• retraction
• elevation
• depression

Question 21

Origin of latissimus Dorsi

Answer 21

Broad aponeurosis of Posterior layer of thoracolumbar fascia

Lower 6 thoracic vertebrae

Iliac crest

Caudal 3 or 4 ribs

Question 22

Insertion of latissimus dorsi

Answer 22

Converges at lower border of teres major, ends as a tendon inserting into the inter-tubercular groove of humerus

Question 23

Innervation of latissimus dorsi

Answer 23

Thoracodorsal nerve C6-8

Question 24

Blood supply of latissimus dorsi

Answer 24

Thoracodorsal artery 
(Branch of subscapular artery which arises from axillary artery)

Question 25

Action of latissimus dorsi

Answer 25

HUMERUS - extends - adducts - medially rotates

Question 26

Origin of levator scapulae muscle

Answer 26

Transverse process of the 1st 4 cervical vertebrae

Question 27

Insertion of levator scapulae

Answer 27

Scapula (superior medial border)

Question 28

Action of levator scapulae

Answer 28

Scapula - elevates superior angle and draws it medically - rotates so glenoid cavity is tilted inferiorly - when scapula fixed, bends neck laterally and rotates it slightly toward the same side

Question 29

Innervation of levator scapulae

Answer 29

C3 C4 -Branch from dorsal scapular nerve C5

Question 30

Origin Deltoid

Answer 30

- Clavicle (lateral 3rd) - Acromion (superior surface) - spine of scapula

Question 31

Insertion of deltoid

Answer 31

Fibres converge into a thick tendon attached to deltoid tuberosity (lateral aspect of the shaft of the humerus)

Question 32

Innervation of deltoid

Answer 32

Axillary nerve C5,C6

Question 33

Blood supply of deltoid

Answer 33

Thoraco-acromial artery | Anterior+posterior humeral circumflex arteries Axillary artery

Question 34

Origin of Supraspinatus

Answer 34

Occupies supraspinous fossa Arises from strong supraspinous fascia

Question 35

Insertion of supraspinatus

Answer 35

Greater tubercle of humerus (Converge to form tendon)

Question 36

Innervation of supraspinatus

Answer 36

Suprascapular nerve | C5 C6

Question 37

Action of supraspinatus

Answer 37

Strengthens shoulder joint by drawing humerus towards glenoid fossa With help from deltoid initiates abduction and Lateral rotator of humerus