Brachial plexus injuries/peripheral neuropathies

Question 1

Erb-Duchenne Palsy

Answer 1

upper trunk injury, ventral rami of C5-C6 affected

Question 2

Klumpke’s Palsy

Answer 2

lower trunk injury, C8, T1 affected

Question 3

Deltoid atrophy

Answer 3

axillary nerve injury

Question 4

Wrist drop

Answer 4

radian nerve injury impairing extension of hand at wrist

Question 5

Ape hand posture

Answer 5

median nerve injury

Question 6

Thenar muscle atrophy

Answer 6

median nerve injury

Question 7

Positive Froment’s sign

Answer 7

ulnar nerve injury

Question 8

Ulnar claw

Answer 8

ulnar nerve injury

Question 9

Major ways to damage axillary nerve

Answer 9

fracture surgical neck of humerus
dislocate shoulder inferiorly
–injury at deltoid tuberosity of humerus (distal att. of deltoid)

Question 10

Major ways to damage radian nerve

Answer 10

fracture humerus
look similar to posterior cord injuries
crutch paralysis

Question 11

Examples of radial nerve injury

Answer 11

wrist drop

tennis elbow

Question 12

Examples of median nerve injury

Answer 12

ape hand posture
thenar atrophy
carpal tunnel syndrome

Question 13

Examples of ulnar nerve injury

Answer 13

positive Froment’s sign, ulnar claw, Klumpke’s palsy (though problem here with trunk C8-T1)

Question 14

Examples of axillary nerve injury

Answer 14

deltoid atrophy

Question 15

Carpal tunnel syndrome

Answer 15

compression of median nerve
paralysis of muscles of thenar eminence and lumbricals 1-2
-ape hand posture
-weakened thumb opposition
-flattening of thenar muscles

Question 16

Thenar atrophy

Answer 16

compression of median nerve