3.1 Upper Limb Anatomy

Question 1

What nerve is most likely damaged if a break occurs at the surgical neck?

Answer 1

Axillary nerve

Question 2

What nerve is most likely damaged if a break occurs at the radial groove?

Answer 2

Radial nerve

Question 3

What nerve is most likely damaged if a break occurs at the distal humerus?

Answer 3

Median nerve

Question 4

What nerve is most likely damaged if a break occurs at the medial epicondyle?

Answer 4

Ulnar nerve

Question 5

What are the Trapezius attachment points?

Answer 5

C-spine, T-spine, scapular spine, and clavicle

Question 6

What are the actions of the Trapezius?

Answer 6

Scapular rotation and retraction

Question 7

Action of the Rhomboids?

Answer 7

Scapular retraction

Question 8

Action of the Levator Scapula?

Answer 8

Scapular elevation

Question 9

Attachment of the Serratus Anterior?

Answer 9

Medial border of scapula to ribs

Question 10

Action of Serratus Anterior?

Answer 10

Scapular protraction

Question 11

Innervation of Serraturs Anterior?

Answer 11

Long thoracic nerve

Question 12

Injury to the Long thoracic nerve causes what?

Answer 12

Scapular winging

Question 13

Deltoid Attachment?

Answer 13

Scapular spin, clavicle, deltoid tuberosity

Question 14

Actions of Deltoid?

Answer 14

Abduction, flexion, extension

Question 15

Innervation of the deltoid?

Answer 15

Axillary Nerve

Question 16

What are the rotator cuff muscles?

Answer 16

1) Supraspinatus
2) Infraspinatus
3) Teres minor
4) Subscapularis

Question 17

Which muscle of the posterior arm crosses both shoulder and elbow joints?

Answer 17

Long head of the triceps brachii

Question 18

Boundaries of the cubital fossa?

Answer 18

1) Line between the lateral and medial epicondyles
2) Pronator tores
3) Brachialradiallis

Question 19

Contents of the cubital fossa?

Answer 19

1) Radial Nerve
2) Biceps Tendon
3) Brachial Artery
4) Medial Nerve

Question 20

Which subcutaneous vein travels along the lateral side of the arm?

Answer 20

Cephalic vein

Question 21

Which subcutaneous vein travels along the medial side of the arm?

Answer 21

Basilic vein

Question 22

Action of Pectoralis Major?

Answer 22

Adducts and medially rotates humerus; draws scapula anteriorly and inferiorly

Question 23

Innervation of the pectorals major?

Answer 23

Lateral and medial pectoral nerves

Question 24

Pectoralis minor Innervation?

Answer 24

Medial pectoral nerve

Question 25

Action pectoralis minor?

Answer 25

Stabilizes scapula by drawing it inferiorly and anteriorly against thoracic wall

Question 26

Serratus anterior action?

Answer 26

Protrracts scapula and holds it agains thoracic wall; rotates scapula

Question 27

Serratus anterior innervation?

Answer 27

Long thoracic nerve

Question 28

Trapezius innervation?

Answer 28

Spinal accessory nerve and C3/C4 spinal nerves

Question 29

Trapezius Action?

Answer 29

Elevates, depresses, and retracts scapula. Rotate glenoid cavity superiorly

Question 30

Latissimus dorsi innervation?

Answer 30

Thoracodorsal nerve

Question 31

Latissimus dorsi actions?

Answer 31

Extends adducts and medially rotates humerus

Question 32

Levator Scapulae action?

Answer 32

Elevates scapula and rotates glenoid cavity inferiorly

Question 33

Levator Scapulae innervation?

Answer 33

Dorsal scapular nerve and cervical nerves

Question 34

Rhomboid minor and major innervation?

Answer 34

Dorsal scapular nerve

Question 35

Rhomboid minor and major action?

Answer 35

Retract scapula and rotate glenoid cavity inferiorly

Question 36

Deltoid Innervation?

Answer 36

Axillary nerve

Question 37

Supraspinatus innervation?

Answer 37

Suprascapular nerve

Question 38

Action of supraspinatus?

Answer 38

initiates and assists deltoid in abduction of arm and acts with rotator cuff muscles

Question 39

Infraspinatus innervation?

Answer 39

suprascapular nerve

Question 40

Action of infraspinatus?

Answer 40

Latterally rotate arm and acts with rotator cuff muscles

Question 41

Teres minor action?

Answer 41

Laterally rotates arm and acts with rotator cuff muscles

Question 42

Teres minor innervation?

Answer 42

Axillary nerve

Question 43

Teres major action?

Answer 43

Adducts and medially rotates arm

Question 44

Teres major innervation?

Answer 44

lower sub scapular nerve

Question 45

Subscapularis action?

Answer 45

Medially rotates arm

Question 46

Biceps brachii action?

Answer 46

Supinates forearm and when it is supine flexes forearm, short head resists dislocation of shoulder.

Question 47

Biceps brachii innervation?

Answer 47

Musculocutaneous nerve

Question 48

Coracobrachialis action?

Answer 48

Helps flex and adduct arm and resists dislocation of shoulder.

Question 49

Coracobrachialis innervation?

Answer 49

Musculocutaneous nerve

Question 50

Triceps brachii innervation?

Answer 50

Radial nerve

Question 51

Triceps brachii action?

Answer 51

Extensor of forearm, log head resists dislocation of humerus, especially important during adduction.