UE Neurology

Question 1

What comes from the cervical plexus of nerves?

Answer 1

3 Supraclavicular nerves (C3 and C4)

Question 2

What does the supraclavicular nerves innervate?

Answer 2

Skin of neck and shoulder

Question 3

What spinal roots are involved in the brachial plexus?

Answer 3

Anterior rami of C5, C6, C7, C8, T1

Question 4

What nerve does the root C5 create?

Answer 4

Dorsal scapular N. - Layer 2 back muscles

Question 5

What nerve does the root of C5, C6, C7 create?

Answer 5

Long thoracic N. - Serratus Anterior m.

Question 6

What are the trunks?

Answer 6

Superior trunk, middle trunk, inferior trunk

Question 7

What anterior rami create the superior trunk?

Answer 7

C5, C6

Question 8

What anterior rami create the middle trunk?

Answer 8

C7

Question 9

What anterior rami create the inferior trunk?

Answer 9

C8, T1

Question 10

What nerves does the superior trunk create?

Answer 10

Suprascapular and nerve to subclavius

Question 11

What is included in the lateral cord?

Answer 11

C5, C6, C7

Question 12

What is included in the posterior cord?

Answer 12

C5, C6, C7, C8, T1

Question 13

What is included in the medial cord?

Answer 13

C8, T1

Question 14

What is created from the lateral cord?

Answer 14

Lateral pectoral N. (C5, C6, C7)- Pectoralis Major

Question 15

What is created from the posterior cord?

Answer 15

Superior subscapular and inferior subscapular (C5,C6)

Thoracodorsal N. (C6,C7,C8)

Question 16

What does the superior subscapular nerve innervate?

Answer 16

Subscapularis

Question 17

What does the inferior subscapular nerve innervate?

Answer 17

Subscapularis and teres major

Question 18

What does the thoracodorsal nerve innervate?

Answer 18

Latissimus dorsi

Question 19

What is created from the medial cord?

Answer 19

(C8, T1) - medial pectoral nerve, medial brachial cutaneous nerve and medial antebrachial cutaneous nerve

Question 20

What does the medial pectoral nerve innervate?

Answer 20

Pectoralis minor and pectoralis major

Question 21

What does the medial brachial cutaneous nerve innervate?

Answer 21

Medial skin of arm

Question 22

What does the medial antebrachial cutaneous nerve innervate?

Answer 22

Medial skin of the forearm

Question 23

What are the terminal branches of the lateral cord?

Answer 23

Musculocutaneous nerve and the lateral antebrachial cutaneous nerve

Question 24

What does the musculocutaneous nerve innervate?

Answer 24

Coracobrachialis, biceps brachii, brachialis

Question 25

What does the lateral antebrachial cutaneous nerve innervate?

Answer 25

Skin of lateral forearm

Question 26

What are the terminal branches of the posterior cord?

Answer 26

Axillary nerve and radial nerve

Question 27

What does the axillary nerve create?

Answer 27

Superior lateral brachial cutaneous nerve

Question 28

What does the axillary nerve innervate?

Answer 28

Deltoid and teres minor

Question 29

What are the terminal branches of the medial cord?

Answer 29

Ulnar nerve

Question 30

What does a terminal branch of the lateral cord and a terminal branch of the medial cord join to create?

Answer 30

Median Nerve

Question 31

What makes up the "M"

Answer 31

Musculocutaneous nerve, median nerve, ulnar nerve

Question 32

Upper plexus injury is caused from what and affects what?

Answer 32

Increasing angle between neck and shoulder; C5 and C6

Question 33

What is an upper plexus injury known as

Answer 33

Erb-duchenne palsy - arm is ADducted, medially rotated and elbow extended = waiter's tip position

Question 34

Lower plexus injury is caused from what?

Answer 34

Increasing angle between trunk and upper limb

Question 35

What results from a lower plexus injury?

Answer 35

Klumpke paralysis when trying to make a fist = claw hand

Question 36

Brachial cord compression

Answer 36

Results from working for an extended amount of time with the upper limb over head; results in pain, loss of sensation, weakness in limb

Question 37

Musculocutaneous nerve injury

Answer 37

Results from trauma; renders anterior brachial muscles paralyzed

Question 38

Axillary nerve injury

Answer 38

Renders deltoid, teres minor paralyzed and results in loss of sensation at superolateral arm due to the axillary nerve creating the superior lateral brachial cutaneous nerve

Question 39

Median nerve injury

Answer 39

Results in thumb ADducted, thenar eminence atrophy and if injury is at elbow, will not be able to flex 2nd and 3rd digits = apes hand or hand of benediction

Question 40

What results from ulnar nerve injury?

Answer 40

Klumpke paralysis = claw hand

Question 41

Handlebar neuropathy

Answer 41

Results from pressure on hamulus of hamate like when riding a bike = loss of sensation on medial side of hand

Question 42

Radial nerve injury

Answer 42

Wrist drop = loss of elbow extension, thumb abduction and extension

Question 43

What provides sensation at the uppermost medial brachial aspect and is from T2?

Answer 43

Intercostobrachial nerve

Question 44

C8 dermatome

Answer 44

Medial hand and 5th digit

Question 45

C7 dermatome

Answer 45

Central hand

Question 46

C6 dermatome

Answer 46

Lateral hand including pollex and lateral antebrachium

Question 47

C5 dermatome

Answer 47

Over deltoid

Question 48

T1 dermatome

Answer 48

medial brachium