Arm

Question 1

What are the muscles located in the arm?

Answer 1

Triceps, biceps choracobrachialis, and brachialis

Question 2

What are the muscles located in the arm?

Answer 2

Triceps, biceps choracobrachialis, and brachialis

Question 3

What nerves innervate the arm?

Answer 3

Musculocutaneous and median nerve

Question 4

The long head of the triceps and the long head of the biceps cross which joint(s)?

Answer 4

The shoulder and the elbow joint.

Question 5

What are the dermatomes of the upper limbs?

Answer 5

C6: Lateral arm, forearm, and thumb
C7: Back of arm, back of forearm, and 2nd and 3rd digits
C8: Medial arm, forearm, and hypothenar

Question 6

What are some distinguishing features of the median cubital vein?

Answer 6

It is usually very prominent and crosses over from the basilic side to the cephalic side

Question 7

What muscle, located in the arm, sits across the bone and is really tight/close

Answer 7

The brachialis - the most powerful forearm flexor

Question 8

What nerves innervate the arm?

Answer 8

Musculocutaneous and median nerve

Question 9

The long head of the triceps and the long head of the biceps cross which joint(s)?

Answer 9

The shoulder and the elbow joint.

Question 10

What are the dermatomes of the upper limbs?

Answer 10

C6: Lateral arm, forearm, and thumb
C7: Back of arm, back of forearm, and 2nd and 3rd digits
C8: Medial arm, forearm, and hypothenar

Question 11

What are some distinguishing features of the median cubital vein?

Answer 11

It is usually very prominent and crosses over from the basilic side to the cephalic side

Question 12

What muscle, located in the arm, sits across the bone and is really tight/close

Answer 12

The brachialis - the most powerful forearm flexor

Question 13

What joint does the long head of the biceps go to?

Answer 13

The shoulder joint

Question 14

Where do the long head and the short head of the bicep meet?

Answer 14

At the biceps tendon

Question 15

What is the purpose of the bicipital aponeurosis?

Answer 15

To protect the median nerve; the veins sit on top of the aponeurosis

Question 16

What is deep to the biceps?

Answer 16

The coracobrachialis

Question 17

What is the big powerful flexor of the forearm?

Answer 17

The brachialis

Question 18

What muscle in the arm is a powerful supinator?

Answer 18

The biceps

Question 19

What muscles attach to the coracoid?

Answer 19

The pectoralis minor, the short head of the biceps, and the coracobrachialis

Question 20

What are the muscles of the anterior arm?

Answer 20

The biceps, the brachialis, and the coracobrachialis

Question 21

What nerve innervates the muscles of the anterior arm?

Answer 21

The musculocutaneous nerve

Question 22

Where does the tendon of the long head of the bicep run?

Answer 22

It runs over the head of the humerus in a synovial sheath that follows the tendon as far as the surgical neck.

Question 23

What holds the tendon of the long head of the biceps in place?

Answer 23

The tendon is held in place in the intertubercular groove by the transverse humeral ligament and the tendon of the pectoralis major

Question 24

What are the muscles of the posterior arm?

Answer 24

The tricep - the long, lateral, and medial head.

Question 25

What nerve innervates the muscles of the posterior arm?

Answer 25

The radial nerve

Question 26

What head of the triceps is the least active?

Answer 26

The long head

Question 27

What is the purpose of the long head of the triceps?

Answer 27

To aid primarily in extending the arm

Question 28

What is the purpose of the medial head of the tricep?

Answer 28

It is the workhorse of forearm extension

Question 29

What is the purpose of the lateral head of the triceps?

Answer 29

It functions primarily against active resistance

Question 30

Which head of the tricep is the strongest generator of force?

Answer 30

The lateral head

Question 31

What does the axillary artery continue to become?

Answer 31

The brachial artery

Question 32

What does the brachial artery divide into?

Answer 32

The radial and ulnar artery

Question 33

The brachial artery lies on what muscles?

Answer 33

The long head of the triceps, the coracobrachialis, and the brachialis

Question 34

What are the main branches of the brachial artery?

Answer 34

The deep brachial, the superior ulnar collateral, and the inferior ulnar collateral

Question 35

Where does the axillary artery turn into the brachial artery?

Answer 35

At the inferior border of the teres major muscle

Question 36

Where does the brachial artery terminate?

Answer 36

At the cubital fossa - where it divides into radial and ulnar arteries

Question 37

What are the major nerves associates with the brachial artery?

Answer 37

The radial, ulnar, and median nerve

Question 38

What are the veins associated with the brachial artery?

Answer 38

The basilic vein, and the 2 venae comitantes

Question 39

What nerves do not have branches in the arm?

Answer 39

The median and the ulnar nerve

Question 40

What nerve innervates the anterior compartment of the arm?

Answer 40

The musculocutaneous nerve

Question 41

What nerve innervates the posterior compartment of the arm?

Answer 41

The radial nerve

Question 42

Injury to the musculocutaneous nerve causes...

Answer 42

Loss of flexion in the elbow

Question 43

What does the musculocutaneous nerve continue as?

Answer 43

The lateral antebrachial cutaneous nerve

Question 44

Where does the radial nerve pass through?

Answer 44

The radial groove on the back of the humerus

Question 45

What does the radial nerve pierce?

Answer 45

The lateral intermuscular septum

Question 46

What does the radial nerve divide into?

Answer 46

The superficial and deep branches

Question 47

Where does the ulanr nerve pass through?

Answer 47

It is medial to the axillary and brachial arteries

Question 48

What does the ulnar nerve pierce?

Answer 48

The medial intermuscular septum

Question 49

What does the ulnar nerve run with?

Answer 49

The superior ulnar collateral artery

Question 50

Injury to the ulnar nerve causes...

Answer 50

Paraesthesia and a shock-like feeling in the hand and forearm

Question 51

Where does the median nerve pass through?

Answer 51

The cubital fossa, deep to the bicipital aponeurosis

Question 52

What is the cubital fossa?

Answer 52

It is a trinagular shaped, fat filled depression of the anterior elbow

Question 53

What are the contents of the cubital fossa?

Answer 53

It contains the terminal part of the brachial artery (that branches into the ulnar and radial arteries), deep veins in the area, the tendon of the biceps brachii, the median nerve, and the radial nerve

Question 54

What is in the floor of the cubital fossa?

Answer 54

The brachialis and the supinator muscle

Question 55

What is in the roof of the cubital fossa?

Answer 55

Brachial and antebrachial fascia, reinforced nu the bicipital aponeurosis