Deck 6: Upper Limb Anatomy and Physiology

Question 1

In the brachial plexus

A)The roots forming the plexus originate from the posterior rami of C5-T1
B)The roots lie between the scalenus medius and scalenus posterior muscles
C)The trunks lie in the upper part of the posterior triangle
D)The division are formed behind the clavicle
E)The cords are formed after the outer border of the 1st rib

Answer 1

The division are formed behind the clavicle

Question 2

with regard to the median nerve

A)it crosses posterior to the brachial artery to lie medial in the cubital fossa
B)its palmar cutaneous branch arises proximal to the carpal tunnel
C)it divides into lateral and medial branches distal to the carpal tunnel
D)it is the sole nerve supply to the flexors of the forearm

Answer 2

its palmar cutaneous branch arises proximal to the carpal tunnel

Question 3

Concerning the wrist joint

A)The distal radius is not part of the joint
B)The joint capsule is thicker posteriorly
C)The triquetral bone forms part of the wrist joint
D)It usually communicates with the distal RUJ
E)It usually communicates with the midcarpal joint

Answer 3

The triquetral bone forms part of the wrist joint

Question 4

In regard to median n distribution in the hand

A)The muscular branch to the thumb is given off prior to passing below the flexor retinaculum
B)Lateral branch supplies the nail bed of the thumb
C)Medial branch supplies the skin over the thenar eminence
D)The 1st lumbrical is supplied by the ulnar n
E)Digital nerves lie deep to the digital arteries

Question 5

The axillary artery

A)Becomes the brachial artery at the upper border of teres major
B)Gives rise to the thoracoacromial artery as its largest branch
C)Lies medial to the axillary vein
D)Gives rise to the superior thoracic artery which supplies lattisimus dorsi
E)Is the continuation of the 3rd part of the subclavian artery

Question 6

In relation to the movements of the thumb

A)APB is inserted into the ulnar side of the base of the prox phalanx
B)Thenar eminence supplied by muscular (remnant) branch of the median n
C)Adduction is by adductor pollicis brevis and longus
D)Opponens pollicis rotates the 1st metatarsal on the triquetral
E)Opponens pollicis inserts to the base of the prox phalanx

Question 7

Elbow joint capsule attachments include

A)Medial and lateral epicondyles
B)Radial head
C)Common flexor origin
D)Annular ligament
E)All of the above

Question 8

In the cubital fossa

A)The brachial a is medial to median n
B)The radial nerve gives off a branch to the biceps
C)Brachialis provides the medial boundary
D)The radial nerve splits into its 2 terminal branches
E)Pronator teres provides the floor

Question 9

Thumb adduction is effected by adductor pollicis and

A)FCR
B)FPB
C)EPL
D)FPL
E)EPB

Question 10

Regarding the shoulder joint

A)full abduction of the humerus is possible only with medial rotation
B)glenohumeral ligaments provide significant stability to the joint
C)the capsule is attached circumferentially to the surgical neck of the humerus
D)nerve supply comes from the axillary, musculocutaneous and suprascapular nn
E)the subacromial bursa extends laterally when the arm is abducted

Question 11

Regarding the brachial plexus

A)The divisions lie in the axilla
B)The solitary branch from the trunk is the dorsal scapular n
C)The axillary n supplies the skin of the axilla
D)The radial nerve is the largest branch of the plexus
E)The cords embrace the first part of the axillary a

Question 12

Regarding the muscles in the hand

A)Palmar abduction of the thumb is produced by APL
B)All lumbricals are supplied by the ulnar n
C)All 4 dorsal interossei arise by 2 heads
D)Lumbrical muscles arise from the superficialis tendons
E)1st and 2nd interossei are supplied by the median n

Question 13

Nerve supply to the wrist is from the following except

A)Ant IO n
B)Post IO n
C)Dorsal branch of ulnar
D)Deep branches of the ulnar
E)Median n

Question 14

The deep muscles of the anterior compartment of the forearm

A)Receive supply from the ant IO branch of median n
B)Are supplied by a branch of the radial a
C)Receive fibres from C7,C8 only
D)All have tendons which run through the flexor tunnel
E)Are involved with supination of the forearm

Question 15

In the upper limb

A)The cephalic vein pierces the clavipectoral fascia to enter the axillary vein
B)The axillary vein starts at the lower border of teres minor
C)Venous drainage of the hand is predominantly the deep veins of the forearm
D)The basilic vein begins in the roof of the anatomical snuff box
E)The median cubital vein lies deep to the bicipital aponeurosis

Question 16

Biceps

A)Is supplied by the radial n
B)Is a weak abductor of the shoulder
C)Has a short head attaching to the coracoid process
D)The 2 heads merge above the deltoid tuberosity
E)Inserts into the tuberosity of the ulna

Question 17

Which of the following nerves is in direct contact with the medial epicondyle of the humerus

A)Ulnar
B)Median
C)Radial
D)Musculocutaneous
E)Medial cutaneous nerve of the forearm

Question 18

A lesion of the medial cord of the brachial plexus would cause

A)Weakness of adduction of the thumb
B)Weakness of wrist extension
C)Weakness of elbow extension
D)Numbness of the lateral aspect of the forearm
E)Numbness in most of the axilla

Question 19

Which of the following is least important in the stability of the shoulder

A)Long head of biceps
B)Short head of biceps
C)Deltoid
D)Supraspinatus tendon
E)Subscapularis tendon

Question 20

With respect to the cubital fossa

A)The brachial artery is lateral to the biceps tendon
B)The radial nerve is the most medial nerve
C)The median basilic vein lies under the bicipital aponeurosis
D)The medial cutaneous nerve of the forearm is lateral to the median cephalic vein
E)Median nerve lies medial to the brachial artery

Question 21

With respect to the carpus

A)The intercarpal joints share one continuous synovial space
B)The intercarpal synovial space is usually continuous with the wrist joint
C)The proximal row = scaphoid, lunate and trapezium
D)The scaphoid is the only carpal which articulates with radius
E)In pronation-supination the carpus move with the ulna

Question 22

The scaphoid

A)Articulates with the base of the 2nd metacarpal
B)Articulates with the hamate
C)Has a poor supply to its distal half
D)Has a palpable tubercle
E)Has a groove for FPL

Question 23

At the flexor aspect of the wrist

A)The median nerve lies between palmaris longus and FDP
B)The median nerve lies between FDP and FCR
C)The ulnar nerve lies between palmaris longus and FCR
D)Radial nerve passes under the tendon of brachioradialis
E)Radial artery crosses the insertion of pronator teres

Question 24

The extensor retinaculum of the wrist

A)Is not attached to the radius
B)Is attached to the pisiform and the triquetral
C)Divides the extensor tunnel into 5 compartments
D)The most medial compartment transmits EDM
E)The most lateral compartment transmits EPL

Question 25

The ulnar n

A)Runs anteriorly to the brachial artery
B)Passes between the heads of pronator teres
C)Lies on FDS
D)Is a direct continuation of the lateral cord
E)Lies in contact with the sublime tubercle