quick peripheral nerve lesions

Question 1

features of carpal tunel syndrome

Answer 1

1) pain an parasthesias (worse at night) - lateral 3.5 digits
2) weakness of LOAF
Lateral two Lumbricals
Opponens pollicis
ABDuctor pollicis
Flexor pollicis brevis

Question 2

carpal tunnel associated (causative) conditions

Answer 2

PHARO

Pregnancy
Hypothyroidism
Acromegaly
Amyloidosis
RA
Obesity

Question 3

Ulnar nerve palsy features

Answer 3

1)wasting of hte medial side of the forearm
2)claw hand deformity
3)weakness of
Hypothenar eminence
Abductor digiti minimi
Median two lumbricals (weak finger flexion)
All interossei (abd AND Add-uction weak)
4)sensory loss of medial 1.5 fingers, doesn
t exten to the wrist

Question 4

causes of ulnar nerve palsy

Answer 4

at elbow
at guyon’s canal
OA
mononeuritis multiplex

Question 5

radial nerve palsy features

Answer 5

wrist drop due to weakness of extensor compartment
sensoryu loss over 1st dorsal interosseus
no muscles of hand affected
decreased grip strength (due to inability to extend the wrist)

Question 6

causes of small hand muscle wasting

Answer 6

1) arthritis
2) old age
3) cervical pathology (C8/T1)
a) spondylosis
b) tumour
4) cervical rib
5) pancoast tumour
6) brachial plexus injury
7) MND
8) combined ulnar + median nerve palsy
9) polyneuropathy
10) CMT
11) old polio
12) syringomyelia

Question 7

common peroneal nerve pasly features

Answer 7

a) foot drop
b) weak dorsiflexion
c) weak eversion
d) sensory loss of dorsal foot

Question 8

causes of mononeurtis multiplex

Answer 8

1) DM
2) RA
3) carcinoma
4) SLE
5) PAN
6) Wegeners granulomatosis
7) sarcoidosis
8) amyloidosis
9) leprosy
10) Lyme disease

Question 9

causes of polyneuropathies

Answer 9

1  DM
2  Alcohol
3  B12 deficiency
5 Drugs
      TCAs
      Amiodarone
      Metronidazole
      Nitrofurantoin
      Isoniazid
      Phenytoin
6  Paraneoplastic
7  Uremia

Rare:
COnnective tissue disorders
GBS
porphyria
lead poisoning
HIV
amyloidosis
sarcoidosis
paraproteinemia
CMT
CIDP