UE Neurology

Question 1

The Cervical Plexus consists of Anterior Rami _______.

Answer 1

C1-C4

Question 2

This comes off the Cervical Plexus from C3 and C4 which travel inferiorly from the nerve point of the neck. Provides cutaneous innervation to the skin over the Neck and Shoulder.

Answer 2

Supraclavicular N.

Question 3

The Supraclavicular N. is divided into what branches?

Answer 3

Lateral Supraclavicular N.
Middle Supraclavicular N.
Medial Supraclavicular N.

Question 4

The Brachial Plexus is derived the Anterior Rami of…

Answer 4

C5-T1

Question 5

The Roots, Trunks, and Divisions of the Brachial Plexus are all (ABOVE/BELOW) the Clavicle, while the Cords and Terminal Branches are (ABOVE/BELOW) the Clavicle.

Answer 5

Above

Below

Question 6

The Roots of the Brachial Plexus travel between the Anterior and Middle Scalene Ms. with what artery?

Answer 6

Subclavian A.

Question 7

Injury to the superior part of the Brachial Plexus (Upper Plexus Injuries) typically affect _____ and _____ Anterior Rami and are usually the result of dramatically increasing the angle between the Neck and the Shoulder. Such an action can stretch, rupture, or avulse the Spinal roots off of the Spinal Cord.

Answer 7

C5

C6

Question 8

An individual with an Upper Plexus Injury will have an Adducted and Medially Rotated Arm and an Extended Elbow, also known as _________ ________ or _______ _______ ________.

Answer 8

Erb-Duchenne Palsy

Waiter’s Tip Position

Question 9

Injury to the inferior part of the Brachial Plexus is less than Upper Plexus Injury and is usually the result of dramatically increasing the angle between the trunk and upper limb. This typically affects the short muscles of the Hand and results in ______ ______ when the individual tries to make a fist, also known as ________ ________.

Answer 9

Claw Hand

Klumpke Paralysis

Question 10

Once the Brachial Plexus branches into Cords, the Subclavian A. has become the ________ A.

Answer 10

Axillary

***After 1st rib

Question 11

T/F. The Posterior Cord runs behind the Axillary A. and the Medial and Lateral Cords run medially and laterally to the Axillary A., respectively.

Answer 11

True

Question 12

This nerve runs with the Ulnar N., and the two can be confused sometimes.

Answer 12

Medial Antebrachial Cutaneous N.

Question 13

Compression of the Cords of the Brachial Plexus usually results in pain radiating down the Arm, loss of sensation, and tingling of the arms and weakness of the Hands. How does this compression usually occur?

Answer 13

From prolonged periods of working with the upper limb extended over the Head

Question 14

Injury to the _________ N., while rare is possible with blunt force trauma and renders the anterior Brachial muscles paralyzed.

Answer 14

Musculocutaneous

Question 15

Injury to the Axillary N. results in atrophy of the Deltoid M. and loss of sensation over the superolateral Arm, where which nerve exists?

Answer 15

Superior Lateral Brachial Cutaneous N.

Question 16

What does the Median N. branch off into from before the Carpal Tunnel clear to the finger-tips?

Answer 16

Median N. — Medial Branch Median N. and Lateral Branch Median N. – Common Palmar Digital Ns. – Proper Palmar Digital Ns.

Question 17

What innervates the 1st and 2nd Lumbricals?

Answer 17

1st = Lateral Branch of the Median N. 
2nd = Medial Branch of the Median N.

Question 18

Injury of the Median N. in the Wrist results in an Adducted Thumb and Thenar Eminence atrophy, known as _____ _____. Injury to the Median N. at the Elbow inhibits flexion of 2nd and 3rd digits, known as _______ ____ _______.

Answer 18

Ape’s Hand

Hand of Benediction (has same symptoms as Ape’s Hand)

Question 19

What does the Ulnar N. branch into right after it exits the Canal of Guyon?

Answer 19

Ulnar N. — Deep Ulnar N. and Superficial Ulnar N.

Superficial Ulnar N. — Common Palmar Digital N. — Proper Palmar Digital N.

Question 20

Ulnar N. injury typically occurs in one of four places: 1) Posterior to the Medial Humeral Epicondyle, 2) Between the Ulnar and Humeral Heads of the Flexor Carpi Ulnaris M. (the so-called Cubital Tunnel), 3) At the wrist, 4) In the Hand. The overall results are similar, extensive loss of sensory and motor control in the Hand, and when an individual tries to make a fist it appears as _____ _____.

Answer 20

Claw Hand

***Remember this is also caused by Lower Plexus injury… aka where the Ulnar N. is located!!!

Question 21

The Ulnar N. can be compressed when pressure is placed on the Hamulus of the Hamate, like when riding a bike. This can produce sensory loss on the medial side of the hand and weakness of the intrinsic hand muscles and is often referred to as…

Answer 21

Handlebar Neuropathy

Question 22

The Radial N. branches into the Superficial Radial N. (passes over Anatomical Snuffbox) which becomes what?

Answer 22

Dorsal Digital N. — Digital Branches of the Dorsal Digital N.

Question 23

The Radial N. branches into the Deep Radial N., which pierces the Supinator M. and becomes what?

Answer 23

Posterior Interosseous N.

Question 24

Injury of the Radial N. results in ______ _____, which is the impairment of elbow extension and thumb abduction and extension.

Answer 24

Wrist Drop

Question 25

This nerve is from T2 and travels laterally to provide sensory cutaneous innervation to the uppermost medial aspect of the Brachium.

Answer 25

Intercostobrachial N.

Question 26

What are the Dermatomes of the UE?

Answer 26

C5 – Over Deltoid M.

C6 – Lateral Antebrachium and Hand, including Pollux

C7 – Central portion of Hand and posterior Antebrachium, including 3rd Digit

C8 – Medial Hand and Antebrachium, including 5th Digit

T1 – Medial Brachium

T2 – Anterior border of Axilla