Muscles of the Upper Limb - Axilla and Brachial Plexus

Question 1

Name nerves A, B and C

Answer 1

A - Upper subscapular nerve

B - Lower subscapular nerve

C - Long thoracic nerve

Question 2

Name muscle A

Answer 2

A - Long head of triceps brachii

Question 3

What are the origin and insertion sites for muscle A?

Answer 3

Origin - 1st rib at sternocostal junction

Insertion - Groove on inferior surface of middle 1/3rd of clavicle

A - Subclavius

Question 4

What is the innervation of muscle A?

Answer 4

Upper and lower subscapular nerves (C5, C6 and C7)

A - Subscapularis

Question 5

What is the innervation of muscle A?

Answer 5

Nerve to subclavius (C5 and C6)

A - Subclavius

Question 6

What are the origin and insertion sites for muscle A?

Answer 6

Origin - Medial 2/3rds of subscapular fossa

Insertion - Lesser tubercle of humerus

A - Subscapularis

Question 7

What is the function of muscle A?

Answer 7

1. Pulls tip of shoulder inferiorly
2. Pulls clavicle medially

A - Subclavius

Question 8

Name structures A and B

Answer 8

A - Medial cord (of brachial plexus)

B - Lateral cord (of brachial plexus)

Question 9

Name nerves A to E

Answer 9

A - Musculocutaneous nerve

B - Axillary nerve

C - Radial nerve

D - Median nerve

E - Ulnar nerve

Question 10

Name muscle A

Answer 10

A - Pectoralis major

Question 11

Name muscle A

Answer 11

A - Triceps brachii

Question 12

What is the function of muscle A?

Answer 12

1. Medial rotation of arm at glenohumeral joint

A - Subscapularis

Question 13

Name muscle A

Answer 13

A - Subclavius

Question 14

What is the function of muscle A?

Answer 14

1. Pulls tip of shoulder inferiorly
2. Protraction of scapula

A - Pectoralis minor

Question 15

Name nerve A and spinal nerves B, C and D from which it is derived

Answer 15

A - Long thoracic nerve

B - C5

C - C6

D - C7

Question 16

What is the innervation of muscle A?

Answer 16

Medial and lateral pectoral nerves

A - Pectoralis major

Question 17

Name the cords of the brachial plexus A, B and C

Answer 17

A - Lateral cord

B - Posterior cord

C - Medial cord

Question 18

Name muscle A

Answer 18

A - Pectoralis minor

Question 19

What are the origin and insertion sites for muscle A?

Answer 19

Origin - Posterior surface of scapula at inferior angle

Insertion - Intertubercular sulcus on the anterior surface of humerus

A - Teres major

Question 20

Name vessel A

Answer 20

A - Axillary artery

Question 21

What are the origin and insertion sites for muscle A?

Answer 21

Origin (Clavicular head) - Medial half of clavicle (anterior surface)

Origin (Sternocostal head) - Anterior sternum, first 7 costal cartilages, sternal end of 6th rib, aponeurosis of external oblique

Insertion - Lateral lip of intertubercular sulcus of humerus

A - Pectoralis major

Question 22

What is the innervation of muscle A?

Answer 22

Medial pectoral nerve (C5-T1)

A - Pectoralis minor

Question 23

Name structure A

Answer 23

A - Posterior cord (of brachial plexus)

Question 24

Name nerves A to D

Answer 24

A - Lateral pectoral nerve

B - Suprascapular nerve

C - Dorsal scapular nerve

D - Nerve to suclavius

Question 25

What is the innervation of muscle A?

Answer 25

Radial nerve (C6, C7, C8) A - Long head of triceps brachii

Question 26

Name muscle A

Answer 26

A - Teres major

Question 27

Name muscle A

Answer 27

A - Latissimus dorsi

Question 28

Name muscle A

Answer 28

A - Latissiumus dorsi

Question 29

Name nerve A

Answer 29

A - Radial nerve

Question 30

What is the function of muscle A?

Answer 30

1. Adduction of arm at glenohumeral joint 2. Medial rotation of arm at glenohumeral joint 3. Extension of arm at glenohumeral joint A - Latissimus dorsi

Question 31

Name nerve A

Answer 31

A - Long thoracic nerve

Question 32

Name muscle A

Answer 32

A - Serratus anterior

Question 33

Name muscle A

Answer 33

A - Subscapularis

Question 34

What is the innervation of muscle A?

Answer 34

Lower subscapular nerve (C5, C6 and C7) A - Teres major

Question 35

What is the function of muscle A?

Answer 35

1. Extension of forearm at elbow joint 2. Adduction (accessory) of arm at glenohumeral joint 3. Extensor (accessory) of arm at glenohumeral joint A - Long head of triceps brachii

Question 36

What is the function of muscle A?

Answer 36

1. Flexion at glenohumeral joint 2. Adduction at glenohumeral joint 3. Medial rotation at glenohumeral joint 4. Flexion of extended arm (clavicular head) 5. Extension of flexed arm (sternocostal head) A - Pectoralis major

Question 37

Name the sections of the brachial plexus A to E

Answer 37

A - Nerves B - Cords C - Divisions D - Trunks E - Roots (**_R_**eally **_T_**ired **_D_**rink **_C_**offee **_N_**ow)

Question 38

What is the innervation of muscle A?

Answer 38

Long thoracic nerve (C5, C6 and C7) A - Serratus anterior

Question 39

What is the function of muscle A?

Answer 39

1. Protraction of scapula 2. Rotation of scapula 3. Opposes medial scapular border and inferior angle to thoracic wall A - Serratus anterior

Question 40

What are the origin and insertion sites for muscle A?

Answer 40

Origin - **Infraglenoid tubercle** of scapula Insertion - **Olecranon process** of ulna A - Long head of triceps brachii

Question 41

Name nerves A to D

Answer 41

A - Median pectoral nerve B - Medial cutaneous nerve of arm C - Medial cutaneous nerve of forearm D - Thoracodorsal nerve

Question 42

What are the origin and insertion sites for muscle A?

Answer 42

Origin - Anterior surfaces and superior borders of **ribs 3-5** Insertion - **Coracoid process** of scapula A - Pectoralis minor

Question 43

What are the origin and insertion sites for muscle A?

Answer 43

Origin - Lateral surface of **upper 8-9 ribs** Insertion - Costal surface of **medial border of scapula** A - Serratus anterior

Question 44

Name muscle A

Answer 44

A - Serratus anterior

Question 45

What are the origin and insertion sites for muscle A?

Answer 45

Origin - Spinous processes of **T8-T12**, spinous processes of **lumbar vertebrae**, **iliac crest**, lower **3-4 ribs** Insertion - Floor of **intertubercular sulcus** A - Latissimus dorsi

Question 46

Name muscle A

Answer 46

A - Subclavius

Question 47

What is the innervation of muscle A?

Answer 47

Thoracodorsal nerve (C6, C7 and C8) A - Latissimus dorsi

Question 48

What is the function of muscle A?

Answer 48

1. Medial rotation of arm at glenohumeral joint 2. Extension of arm at glenohumeral joint A - Teres major

Question 49

Name muscle A

Answer 49

A - Subclavius