Arm

Question 1

Anterior compartment muscles of the arm

Answer 1

biceps brachii, brachialis and coracobrachialis

Question 2

All anterior compartment muscles of the arm are innervated by …

Answer 2

musculocutaneous nerve

Question 3

Posterior compartment muscles of the arm and their innervation…

Answer 3

triceps brachii, anconeus

radial nerve

Question 4

The short head of the biceps brachii originates from the..

Answer 4

coracoid process

Question 5

The long head of the biceps brachii originates from the … runs through the glenohumeral joint over the head of the humerus and inside the ….groove where it is fixed in place by the…. ligament.

Answer 5

supraglenoid tubercle
intertubercular groove
transverse humeral ligament

Question 6

The pec major keeps the long head tendon of the biceps brachii in the intertubercular groove by …

Answer 6

inserting on the lateral lip

Question 7

Distal end of the biceps brachii forms a tendon which attaches to the …

Answer 7

tuberosity of radius

Question 8

Biceps brachii function

Answer 8

flexes the arm and forearm

supinates the forearm when elbow is flexed at 90 degrees

Question 9

Biceps tendonitis affects the tendon of the …

Answer 9

long head

Question 10

Most injuries occur during … contraction

Answer 10

eccentric

Question 11

Brachialis muscle lies deep to the biceps and is a major…..

Answer 11

elbow flexor

Question 12

The origin of the brachialis ..

Insertion?

Answer 12

O: distal half of anterior surface of the humerus
I: coronoid process and tuberosity of ulna

Question 13

Innervation of brachialis muscle

Answer 13

musculocutaneous

Question 14

Origin and insertion of coracobrachialis

Answer 14

O: coracoid process
I: middle 1/3 of humerus

Question 15

Innervation of coracobrachialis?

Answer 15

musculocutaneous nerve

Question 16

Function of coracobrachialis?

Answer 16

flexes and adducts the shoulder

Question 17

Median nerve runs … to coracobrachialis muscle and the musculocutaneous nerve runs … to the inferior portion of the muscle.

Answer 17

deep

anterior

Question 18

Long head of triceps origin? Lateral and medial head?

Answer 18

infraglenoid tubercle

posterior of humerus

Question 19

Insertion of triceps?

Answer 19

olecranon process of ulna

Question 20

Musculocutaneous nerve comes from the …. pierces the …. innervates … and ends as the ….

Answer 20

lateral cord of the brachial plexus
coracobrachialis muscle
all three anterior flexors of the arm
lateral cutaneous nerve of the forearm

Question 21

Symptoms of musculocutaneous nerve injury

Answer 21

paralysis of coracobrachialis, biceps and brachialis muscles.
weakened shoulder flexions, weakended forearm flexions and supination. loss of lateral sensation on the forearm

Question 22

Radial nerve is the direct continuation of the …

Answer 22

posterior cord of the brachial plexus

Question 23

Deep branch of the radial nerve aka…. supplies …. and elbow joint. Superficial branch supplies…

Answer 23

posterior interosseous nerve
forearm muscles
skin of dorsum and hand/digits

Question 24

Symptoms of radial nerve injury before branches:

After?

Answer 24

paralysis of triceps (loss of elbow extension), extensor muscles of wrist and digits
same but no loss of tricep function

Question 25

Median nerve has … branches in the arm

Answer 25

no

Question 26

Ulnar nerve innervates …. and has … branches in the arm.

Answer 26

elbow joint

no

Question 27

Myotomes: C5, C6, C7, C8, T1

Answer 27

shoulder abduction
elbow flexion
elbow extension
wrist extension
abd/adduction of fingers