7 - Dissection - Back, Shoulder & Brachial Plexus

Question 1

Answer 1

Question 2

Answer 2

A = trapezius muscle
B = deltoid muscle
C = tendon of long head of biceps
D = supraspinatus tendon
E = trapezius muscle

Question 3

Answer 3

Question 4

Where does the subscapularis insert?

Answer 4

On the lesser tuberosity or the surgical neck of the humerus

Question 5

Where do the subraspinatus, infraspinatus and teres minor all insert on the humerus?

Answer 5

On the greater tuberosity

Question 6

Answer 6

A = deltoid muscle (anterior)
B = acromion process
C = deltoid muscle (anterior)
D = subscapularis muscle
E = scapula
F = infraspinatus muscle (teres minor sits between this and the deltoid)

Question 7

Answer 7

Question 8

Answer 8

AxA = axillary
SubScapA = subscapular
CircSubscapA = circumflex scapular
ThDorA = thoracodorsal
AntCircHum = anterior humeral circumflex
PostCircHum = posterior humeral circumflex
BrachA = brachial
DpArtofArm = deep artery of arm
DpBrachA = deep brachial artery
NutHumA = nutrient humeral
MuscBranchesA = muscular branch

Question 9

What is the anatomical name of the deep brachial artery?

Answer 9

The profunda brachii artery

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Question 14

Which rotator cuff muscle attaches to the lesser tubercle of the humerus?

• Infraspinatus
• Subscapularis
• Supraspinatus
• Teres major
• Teres minor

Answer 14

Subscapularis

Question 15

The anterior compartment of the arm is innervated by which terminal branch of the brachial plexus?

Answer 15

Musculocutaneous

Question 16

Which part of the brachial plexus is located around the second part of the axillary artery?

Answer 16

Cords

Question 17

Which terminal branch of the brachial plexus arises from the medial cord only?

Answer 17

Ulnar

Question 18

What is the name of the artery that passes through the quadrangular space?

Answer 18

Posterior humeral circumflex artery

Question 19

There terminal branches of the brachial plexus collectively arise from the posterior rami of spinal nerves C5-T1.

True or False?

Answer 19

False - they arise from the ANTERIOR rami of spinal nerves C5-T1

Question 20

The supraspinatus muscle attaches to the supraspinous fossa and the superior facet of the greater humeral tubercle.

True or False?

Answer 20

True

Question 21

The coracobrachialis, pectoralis minor and long head of the biceps brachii attach to the coracoid process.

True or False?

Answer 21

False - Coracobrachialis, pectoralis minor and short head of biceps brachii attach to the coracoid process.

Question 22

The axillary artery becomes the brachial artery at the superior border of the teres minor muscle.

True or false?

Answer 22

False - The axillary artery becomes the brachial artery at the inferior border of the teres minor muscle.

Question 23

The spinal root values of the axillary nerve are C5 & C6.

True or False?

Answer 23

True

Question 24

What are the boundaries of the quadrangular space?

Answer 24

Teres minor superiorly, long head of triceps medially, teres major inferiorly, surgical neck of humerus laterally.

Question 25

What are the cutaneous nerves that supply the arm?

Answer 25

Posterior cutaneous nerve of arm,

Medial cutaneous nerve of arm,

Intercostobrachial nerve,

Inferior cutaneous nerve of arm,

Axillary nerve (superior lateral cutaneous nerve of arm)

Question 26

What is the landmark origin of the axillary artery?

Answer 26

Lateral border of 1st rib

Question 27

What is the landmark of termination of the axillary artery and what vessel does it become?

Answer 27

Inferior border of teres major, becomes brachial artery

Question 28

What muscles attach to the coracoid process?

Answer 28

Coracoid process muscle attachments: pectoralis minor, coracobrachialis, short head
of biceps brachii