Exam Questions Posterior Arm The Funky Professor videos can be viewed here; http://publishing.rcseng.ac.uk/journal/video?doi=10.1308%2Fvideo.2016.1.1&videoTaxonomy=FUNK

1. Questions
Posterior Arm

2. The following structures are encountered in the posterior
compartment of arm
1 lateral head of triceps
2 ulnar nerve
3 coracobrachialis
4 radial nerve
5 brachial artery

3. All three heads of triceps are located in the posterior compartment of arm. Also in
the posterior compartment is the radial nerve as it runs in relation to the spiral
groove on the posterior aspect of the humerus.
In the distal part of the arm the ulnar nerve pierces the medial intermuscular
septum to enter the posterior compartment of the arm, before running behind the
medial epicondyle of the humerus to enter the forearm.
The following structures are encountered in the posterior
compartment of arm
1 lateral head of triceps T
2 ulnar nerve T
3 coracobrachialis F
4 radial nerve T
5 brachial artery F

4. The following structures are found in the posterior
compartment of the arm
1 Brachial artery
2 Profunda brachii artery
3 Median nerve
4 Radial nerve
5 Ulnar nerve

5. The following structures are found in the posterior
compartment of the arm
1 Brachial artery F
2 Profunda brachii artery T
3 Median nerve F
4 Radial nerve T
5 Ulnar nerve T
The brachial artery lies in the anterior compartment. The profunda brachii is a branch
of the brachial artery and is the artery of the posterior compartment supplying the
triceps.
The median nerve lies in the anterior compartment.
The ulnar nerve courses through the lower part of the posterior compartment

6. The triceps inserts onto
1 Corcacoid process
2 Coronoid process
3 Capitulum
4 Olecranon process
5 Infraglenoid tubercle

7. The triceps inserts onto
1 Corcacoid process F
2 Coronoid process F
3 Capitulum F
4 Olecranon process T
5 Infraglenoid tubercle F
The short head of biceps originates from the coracoid process.
The long head of triceps originates from the infraglenoid tubercle.
Brachialis muscle inserts onto the coronoid process.
The capitulum articulates with the radial head at the elbow joint

8. The long head of triceps originates from
1 The corcacoid process
2 Supraglenoid tubercle
3 Infraglenoid tubercle
4 Posterior shaft of the humerus
5 Anterior shaft of the humerus

9. The long head of triceps originates from
1 The corcacoid process F
2 Supraglenoid tubercle F
3 Infraglenoid tubercle T
4 Posterior shaft of the humerus F
5 Anterior shaft of the humerus F
The short head of biceps originates from the coracoid process.
The long head of biceps originates from the supraglenoid tubercle

10. Transection of the radial nerve at the level of the humeral
epicondyles will cause
1 loss of sensation in the nailbeds of index and
middle fingers
2 wrist drop
3 paralysis of extensor pollicis longus
4 loss of cutaneous sensation on dorsum of ulnar
border of hand
5 loss of extension of the elbow joint

11. The nailbeds of the index and middle fingers are innervated by the median nerve
not the radial nerve
Wrist drop occurs due to paralysis of virtually all the muscles in the extensor
compartment of forearm, including the wrist extensors.
The dorsum of the ulnar aspect of hand is supplied by the dorsal branches of the
ulnar nerve, not by the radial nerve.
The radial nerve’s branches to triceps brachii (the extensor of the elbow) are given
off in the proximal part of the arm. Consequently an injury to the radial nerve at
the level of the epicondyles will not compromise elbow extension
Transection of the radial nerve at the level of the humeral
epicondyles will cause
1 loss of sensation in the nailbeds of index and
middle fingers
F
2 wrist drop T
3 paralysis of extensor pollicis longus T
4 loss of cutaneous sensation on dorsum of ulnar
border of hand
F
5 loss of extension of the elbow joint F