chapter 19 Flashcards
What are the 4 nerves of the upper limb?
1) Musculocutaneous nerve
2) median nerve
3) ulnar nerve
4) radial nerve
The musculocutaneous nerve is the continuation of the _________________ of the brachial plexus, beginning after the lateral root of the median nerve is given off
Lateral cord
the musculocutaneous nerve pierces the?
Coracobrachialis muscle
The musculocutaneous nerve descends through the _____________________________, coursing BETWEEN the biceps brachii and brachialis muscles
Anterior compartment of the arm
The musculocutaneous nerve innervates __ muscles in the ARM:
3
What are the 3 muscles in the arm that the musculocutaneous nerve innervates?
1) coracobrachialis
2) biceps brachii
3) brachialis
the musculocutaneous nerve emerges _________ to the tendon of the biceps brachii muscle and becomes the _____________________
1) Lateral
2) lateral antebrachial cutaneous nerve (LAC)
The lateral antebrachial cutaneous nerve supplies?
the skin of the lateral forearm
The medial nerve originates from the ________ and _________ of the median nerve
1) lateral root
2) medial root
the medial nerve descends through the ____________, where it has NO muscular or cutaneous innervation. It travels THROUGH the CUBITAL FOSSA (a depression on the anterior aspect of the elbow) where it is found _________ to the brachial artery. WITHIN THE CUBITAL FOSSA, it gives off a branch called the ____________
1) Medial compartment of the arm
2) MEDIAL
3) Anterior interosseous nerve (AIN)
As the median nerve enters the forearm, it courses BETWEEN the two heads of origin of the ________________.
pronator teres muscles
In the proximal forearm, the medial nerve passes __________ to the ARCH of the flexor digitorum superficialis muscle with the ______________. The Medial nerve descends through the forearm, BETWEEN the flexor digitorum superficial and the flexor digitorum profundus muscles
1) DEEP
2) ulnar nerve
the median nerve innervates ____ muscles in the FOREARM
4
What are the 4 muscles in the forearm that the median nerve innervates?
1) pronator teres
2) Flexor carpi radialis
3) Palmaris longus
4) Flexor digitorum superficialis
PROXIMAL to the flexor retinaculum, the median nerve gives off a ______________ that courses ANTERIOR to the flexor retinaculum to CUTANEOUSLY innervate the ______ of the ______________. The nerve then divides into its terminal branches at the __________ of the flexor retinaculum:
-Direct branches of the median nerve provide muscular innervation to lumbricals __ and __
-Digital branches of the median nerve give CUTANEOUS innervation to the ________________ and their TIPS POSTERIORLY
-The ________________ of the median nerve courses proximally into the thenar area supplying _____ thenar muscles:
1) palmer branch
2) skin
3) lateral palm
4) distal border
5) 1
6) 2
7) Lateral 3.5 digits anteriorly
8) recurrent branch
9) 2.5
What are the thenar muscles that are supplied by the recurrent branch of the median nerve that courses?
1) Abductor pollicis brevis
2) Flexor pollicis brevis (superficial head)
3) Opponens pollicis
The anterior interosseous nerve arises as a branch of median nerve __________ the CUBITAL FOSSA. It courses distally along the _______________ of the interosseous membrane, BETWEEN the flexor pollicis longus and ______________________.
1) within
2) Anterior surface
3) flexor digitorum profundus muscles
the anterior interosseous nerve innervates ____ muscles in the FOREARM.
2.5
what are the muscles that are innervated by the anterior interosseous nerve?
1) flexor digitorum profundus (lateral half)
2) Flexor pollicis longus
3) pronator quadratus
The ulnar nerve is the continuation of the _________ of the brachial plexus , beginning after the medial root of the median nerve is given off. It descends through the _______________, where it has NO muscular or cutaneous innervation. The nerve pierces the ______________ of the MEDIAL INTERMUSCULAR SEPTUM as it passes from the MEDIAL to the ___________________ of the arm. It then courses POSTERIOR to the __________________ with the superior ulnar collateral artery
1) medial cord
2) Medial compartment of the arm
3) posterior lamina
4) Posterior compartment
5) medial epicondyle
The ulnar nerve enters the forearm by passing BETWEEN the two heads of origin of the ___________.
Flexor carpi ulnaris muscles
The ulnar nerve courses through the forearm BETWEEN the flexor carpi ulnaris and _______________________
flexor digitorum profundus muscles
The ulnar nerve innervates ____ muscles in the FOREARM
1.5
What are the muscles that the ulnar nerve innervates?
1) Flexor carpi ulnaris
2) Flexor digitorum profundus (medial half)
The ulnar nerve course with the ULNAR ARTERY in the ________ of the forearm
Distal half
In the distal forearm, the ulnar nerve gives off a __________________ the CUTANEOUSLY innervates the ______________ of the MEDIAL 1.5 DIGITS and HAND. PROXIMAL to the _______________ that courses ANTERIOR to the flexor retinaculum, to CUTANEOUSLY innervate the SKIN of the ____________.
1) dorsal branch
2) dorsum
3) palmer branch
4) medial palm
In the wrist the ulnar nerve is accompanied by the ULNAR ARTERY as it enters the hand by passing ____________ to the flexor retinaculum, outside the carpal canal and through ___________. ___________ to the pisiform bone, the nerve divides into its _______ terminal branches. What are the 2 branches?
1) Anterior
2) Guyon’s canal
3) Lateral
4) 2
5)
6) Superficial branch of the ulnar nerve
7) deep branch of the ulnar nerve
The superficial branch of the ulnar nerve courses ______ to the palmaris brevis muscle
deep
The superficial branch of the ulnar nerve innervates how many muscles in the hand and what are the names of these muscles?
1) 1
2) Palmaris brevis
the superficial branch of the ulnar nerve divides into cutaneous digital branches that supply the _______________
medial 1.5 digits, anteriorly
The deep branch of the ulnar nerve courses BETWEEN hypothenar muscles, namely the abductor digiti minimi and ______________ muscles. It courses AROUND the hook of the hamate to pass ____________ across the palm, just anterior to the interossei muscles.
1) Flxor digiti minimi brevis
2) laterally
The deep branch of the ulnar nerve innervates ______ muscles of the HAND?
14.5
What are the muscles that the deep branch of the ulnar nerve innervates in the HAND?
1) Abductor digiti minimi
2) Flexor digiti minimi brevis
3) Opponens digiti minimi
4) Lumbricals 3 and 4
5) Dorsal interossei (1-4)
6) Palmer interossei (1-4)
7) adductor pollicis
8) Flexor pollicis brevis (deep hand)
The radial nerve is the continuation of the ____________ of the brachial plexus, beginning after the axillary nerve is given off. The nerve courses from MEDIAL TO LATERAL behind the humerus in the ___________________
1) posterior cord
2) Posterior compartment of the arm
The radial nerve innervates __ muscles in the ARM?
1
What is the muscle that the radial nerve innervates in the ARM?
Triceps brachii
The radial nerve pierces the ___________________ as it passes from the POSTERIOR to the ANTERIOR COMPARTMENT of the arm. the nerve passes THROUGH the _____________ side of the CUBITAL FOSSA
1) lateral intermuscular septum
2) lateral
The radial nerve innervates __ muscles in the FOREARM?
3
What are the muscles that the radial nerve innervates in the FOREARM?
1) Brachioradialis
2) Extensor carpi radialis longus
3) Anconeus
BETWEEN the brachialis and brachioradialis muscles, the radial nerve divides into its 2 terminal branches: What are they?
1) superficial branch of the radial nerve
2) deep branch of the radial nerve
The superficial branch of the radial nerve courses distally with the RADIAL ARTERY, _______ to the brachioradialis muscle. In the wrist, the nerve passes OVER the tendons of the ______________ and enters the hand to provide CUTANEOUS innervation to the SKIN on the _____________________ of the DORSUM of the HAND, and the proximal portion of the ____________________
1) deep
2) Anatomical snuffbox
3) lateral half
4) lateral 3.5 digits, posteriorly
The deep branch of the radial nerve innervates ___ muscles in the FOREARM
1
What is the muscle of the FOREARM that the deep branch of the radial nerve innervates?
Extensor carpi radialis brevis
As the Deep branch of the radial nerve enters the ______________ of the supinator muscle, its name changes to ____________________
1) superior border
2) posterior interosseous nerve (PIN)
The posterior interosseous nerve innervates how many muscles in the FOREARM and what are the names of these muscles?
1) 8
2) extensor digitorum
3) extensor digiti minimi
4) extensor carpi ulnaris
5) Supinator
6) Abductor pollicis longus
7) extensor pollicis bervis
8) extensor pollicis longus
9) extensor indicis
The superificial branch of the radial nerve has NO …
Muscular innervation
The posterior interosseous nerve does NOT enter…
the hand
1) Which of the following is false?
a. The median nerve gives off the anterior interosseous nerve (AIN) within the cubital fossa
b. The nerve that becomes the lateral antebrachial cutaneous nerve (LAC) innervates 3 muscles in the arm
c. The recurrent branch of the median nerve courses proximally into the thenar area
d. The ulnar nerve pierces the posterior lamina of the lateral intermuscular septum
The ulnar nerve pierces the posterior lamina of the lateral intermuscular septum
2) Which of the following is FALSE regarding the median nerve?
a. It gives off a palmar branch that courses anterior to the flexor retinaculum
b. In the proximal forearm, it passes deep to the arch of the flexor digitorum superficialis
c. It innervates 4 muscles in the forearm
d. Digital branches of the median nerve give cutaneous innervation to the medial 3.5 digits anteriorly and their tips posteriorly
d. Digital branches of the median nerve give cutaneous innervation to the medial 3.5 digits anteriorly and their tips posteriorly
3) Which of the following is TRUE regarding the ulnar nerve?
a. The deep branch of the ulnar nerve courses around the hook of the hamate to pass medially across the palm
b. Posterior to the pisiform bone, the ulnar nerve divides into its two terminal branches
c. The deep branch of the ulnar nerve supplies 13 muscles in the hand
d. The ulnar nerve and its branches supply 17 muscles total
d. The ulnar nerve and its branches supply 17 muscles total
6) The anterior interosseous nerve (AIN) arises as a branch of the median nerve WITHIN the cubital fossa? True or false
true
7) Which of the following is TRUE regarding the musculocutaneous nerve?
a. Descends through the medial compartment of the arm, coursing between the biceps brachii and brachialis muscles
b. The musculocutaneous nerve is the continuation of the medial cord
c. One of its branches gives off supplies the skin of the lateral forearm
d. This nerve pierces through the brachialis muscle
c. One of its branches gives off supplies the skin of the lateral forearm
8) The deep branch of the ulnar nerve supplies the palmaris brevis muscle?
True or false
false
9) Which of the following is FALSE regarding the radial nerve?
a. The superficial branch of the radial nerve has no muscular innervation
b. The PIN innervates 8 muscles in the forearm
c. The radial nerve changes its name to posterior interosseous nerve (PIN) at the inferior border of the supinator muscle
d. The radial nerve pierces the lateral intermuscular septum as it passes from the posterior to anterior compartment in the arm
c. The radial nerve changes its name to posterior interosseous nerve (PIN) at the inferior border of the supinator muscle
10) The posterior interosseous nerve (PIN) supplies all of the following muscles EXCEPT?
a. Supinator
b. Exterior indicis
c. Extensor digitorum
d. Anconeus
d. Anconeus
11) The deep branch of the ulnar nerve supplies all of the following muscles EXCEPT?
a. Flexor pollicis brevis (superficial head)
b. Lumbricals 3 and 4
c. Adductor pollicis
d. Flexor pollicis brevis (deep head)
a. Flexor pollicis brevis (superficial head)
12) Which of the following is FALSE regarding the ulnar nerve?
a. It gives off the superficial and deep branch of the ulnar nerve
b. In the wrist, the ulnar nerve is accompanied by the ulnar artery as it enters the hand
c. The superficial branch of the ulnar nerve innervates the palmaris brevis muscle
d. The ulnar nerve passes anterior to the flexor retinaculum, through the carpal canal, and through Guyon’s canal
d) The ulnar nerve passes anterior to the flexor retinaculum, through the carpal canal, and through Guyon’s canal
13) All of the following are true except?
a. The ulnar nerve courses between the flexor carpi ulnaris and flexor digitorum superficialis muscles in the forearm
b. The median nerve course between the heads of origin of the pronator teres muscle as it enters the forearm
c. The ulnar nerve courses posterior to the medial epicondyle
d. The medial half of flexor digitorum profundus is innervated by the ulnar nerve
a. The ulnar nerve courses between the flexor carpi ulnaris and flexor digitorum superficialis muscles in the forearm
14) Match the correct nerve with the muscle that it innervates:
a. Abductor pollicis longus:
b. Dorsal interossei (1-4):
c. Pronator quadratus:
d. Opponens pollicis:
e. Pronator teres:
f. Extensor carpi radialis longus:
a) PIN
b) deep branch of the ulnar nerve
c) AIN
d) Recurrent branch
e) Median nerve
f) radial nerve
15) Which nerve courses THROUGH the Guyon’s canal?
a. Ulnar nerve
b. Radial nerve
c. Musculocutaneous nerve
d. Median nerve
a. Ulnar nerve
