Brachial plexus injury

Question 1

Describe clinical presentation of carpal tunnel syndrome

Answer 1

Parasthesiae in lateral 2.5 fingers (median nerve distribution)
Pain often worse at night
Wasting seen over thenar eminence

Question 2

What nerve runs through carpal tunnel

Answer 2

Median nerve

Question 3

Nerve roots of median nerve

Answer 3

C5-T1

Question 4

Special tests used in diagnosis of CTS

Answer 4

Phalen’s test

Tinel’s test

Question 5

What is CTS associated with

Answer 5

Pregnancy
Oral contraceptive pill
Diabetes mellitus
Heart failure
Acromegaly
Rheumatoid arthritis
Gout

Question 6

What muscles can be paralysed by injury to C5 an C6 nerve roots

Answer 6

Lateral rotators - Infraspinatus; Teres minor
Abductors - Supraspinatus; Deltoid
Supinators - Biceps
Flexors - Brachialis

Question 7

What muscles atrophy from injury to C8 and T1 nerve roots

Answer 7

Interosseous muscles
Thenar muscles
Hypothenar muscles

Question 8

Where is sensation decreased from injury to C8 and T1 nerve roots

Answer 8

Decreased sensation of medial hand and medial forearm

Question 9

Which nerve, if damaged, is associated with wrist drop

Answer 9

Radial nerve

Question 10

What are roots of radial nerve

Answer 10

C5 to C8

Question 11

Nerve roots of:
Musculocutaneous nerve
Median nerve

Answer 11

Musculocutaneous = C5-C7
Median = C5-T1

Question 12

Nerve roots of:
Ulnar
Radial
Axillary

Answer 12

Ulnar = C8-T1
Radial = C5-C8
Axillary = C5-C6

Question 13

What nerve is damaged if atrophy of deltoid muscle is seen

Answer 13

Axillary

Question 14

What nerve is damaged in cubital tunnel syndrome

Answer 14

Ulnar (C8-T1)