Muscles of the Back and Upper Limb

Question 1

Origin of Trapezius muscle

Answer 1

C7-T12, Nuchal line, Occipital protuberence, ligament nuchae

Question 2

Insertion of Trapezius

Answer 2

Acromion, Spine of scapula and Clavicle

Question 3

Innervation of Trapezius

Answer 3

Cranial nerve 9

Question 4

Action of Trapezius

Answer 4

Extend, Depress and retracts, rotates scapula

Question 5

Origin of Latissimus dorsi

Answer 5

Iliac crest, inferior three ribs, T7-L5

Question 6

Insertion of Latissimus dorsi

Answer 6

Humerus

Question 7

Innervation of Latissimus dorsi

Answer 7

Thoracodorsal or medial sub-scapular nerve

Question 8

Action of Latissimus dorsi

Answer 8

Adduct, extend and medially rotates humerus at shoulder

Question 9

Levator scapulae origin

Answer 9

Transverse process of C1-C4

Question 10

Levator scapulae insertion

Answer 10

Medial border of scapula

Question 11

Levator scapulae innervation

Answer 11

Dorsal scapula n and C3-C4 n

Question 12

Levator scapulae action

Answer 12

Elevates scapula and rotates it (by tilting glenoid cavity inferiorly)

Question 13

Rhomboid major and minor origin

Answer 13

Minor: Ligamentum niche, C7-T1
Major: T2-T5

Question 14

Rhomboid major and minor innervation

Answer 14

Dorsal scapular n

Question 15

Rhomboid major and minor insertion

Answer 15

Medial border of scapula

Question 16

Rhomboid major and minor action

Answer 16

Retracts scapula and rotates it to depress glenoid cavity. Fixes scapula to thoracic wall

Question 17

Deltoid origin

Answer 17

Clavicle, Acromium, Spine of scapula

Question 18

Deltoid insertion

Answer 18

Deltoid tuberosity on humerus

Question 19

Deltoid innervation

Answer 19

Axillary nerve (C5-C6)

Question 20

Deltoid action

Answer 20

Anterior part: Flexes and medially rotates
Middle part: Abduct
Posterior part: Extend and laterally rotates arm at shoulder

Question 21

Teres major origin

Answer 21

inferior angle scapula

Question 22

Teres major insertion

Answer 22

humerus

Question 23

Teres major innervation

Answer 23

lower sub scapular n (C5-C6)

Question 24

Teres major action

Answer 24

adducts arm and medially rotates shoulder

Question 25

Serratus anterior origin

Answer 25

upper eight ribs

Question 26

Serratus anterior insertion

Answer 26

scapula

Question 27

Serratus anterior action

Answer 27

rotates and protracts scapular, pulls it anteriorly to thoracic wall

Question 28

Serratus anterior innervation

Answer 28

long thoracic n

Question 29

Subclavius origin

Answer 29

junction between costal cartilage and 1st rib

Question 30

Subclavius insertion

Answer 30

clavicle

Question 31

Subclavius innervation

Answer 31

subclavius (C5-C6)

Question 32

Subclavius action

Answer 32

depress and anchors clavicle

Question 33

Pectoralis major origin

Answer 33

Clavicle, Sternum, Costal cartilages; aponeurosis of external abdominal oblique

Question 34

Pectoralis major insertion

Answer 34

humerus

Question 35

Pectoralis major innervation

Answer 35

lateral (C5-C7) and medial pectoral (C8-T1)

Question 36

Pectoralis major action

Answer 36

Flexes, adducts and medially rotates arm at shoulder

Question 37

Pectoralis minor origin

Answer 37

3rd to 5th ribs and deep fascia

Question 38

Pectoralis minor insertion

Answer 38

Coracoid process of scapula

Question 39

Pectoralis minor innervation

Answer 39

medial pectoral nerve (C8-T1)

Question 40

Pectoralis minor action

Answer 40

depresses and protracts scapula

Question 41

Capsule and Articular disc

Answer 41

Surrounds acromioclavicular joint Allows gliding and sliding movement when arm is raised and rotated

Question 42

Coracoclavicular ligament

Answer 42

Between the coracoid process and the clavicle Reinforces the joint by stabilizing the clavicle

Question 43

Acromioclavicular joint

Answer 43

Between the acromium and the clavicle Supports the joint superiorly

Question 44

Fibrous capsule of glenohumeral joint

Answer 44

Surrounds joint. Permits abduction, adduction, flexion, extension, circumduction. Most commonly dislocated joint

Question 45

Glebohumeral ligament

Answer 45

Has middle, inferior and superior thickenings Glenoid cavity to humerus

Question 46

Coracohumeral

Answer 46

Between the coracoid process and greater tubercule of humerus

Question 47

Transverse humeral

Answer 47

Spans the greater and lesser tubercle of humerus Holds long head of biceps tendon in intertubercular groove

Question 48

Glenoid labrum

Answer 48

Fibrocartilagionous ligament that deepens glenoid cavity Margin of glenoid cavity of scapula

Question 49

Subacromial

Answer 49

Between the coracoacromial arch and suprascapular muscle

Question 50

Subdeltoid

Answer 50

Between the deltoid muscle and capsule

Question 51

Subscapular

Answer 51

Between subscapularis tendon and scapular neck