(39) Radiculopathies, Plexopathies, and Neuropathies Flashcards Preview

Neuro Block 2 > (39) Radiculopathies, Plexopathies, and Neuropathies > Flashcards

Flashcards in (39) Radiculopathies, Plexopathies, and Neuropathies Deck (36):
1

what level is the most common cervical disk herniations

C7 >>> C6

2

what level is the most common cervical spondylosis

C5 and C6

3

95% of lumbar herniations are at what levels

L5 or S1

4

what part of the nerve lies on top of the disk

nerve root

5

describe the pain typical in radiculopathies

paracentral and radiating

6

what are 3 features (other than pain) of radiculopathies

1. weakness/atrophy
2. parasthesias/sensory loss
3. diminished/absent stretch reflexes

7

what is the freq cause of radiculopathy in persons > 50 and <50

> 50 = spondylosis
<50 = disc herniation

8

CT or MRi for radiculopathies

MRI

9

what testing is most helpful for assessing nerve function?

EDX

10

T or F: EDX testing asses muscle fibers

true

11

T or F: EDX identifies demyelination and axon loss

true

12

muscle fiber biopsy seen with neuropathies

atrophic fibers and fiber type grouping

13

findings in carpel tunnel syndrome

numbness in first 3.5 fingers with pain (*thenar muscles only, not hypothenar)
prolonged conduction time

14

findings in ulnar N compression

weakness and atrophy in hypothenar mulces (digits 4 and 5)

15

nerve affected in saturday night palsy (compressing the radial nerve at the spiral groove)

radial N

16

What nerve is affected to cause wrist drop

radial

17

what nerve is affected to cause foot drop? where is is compressed?

peroneal at the fibular head of the knee

18

is diabetic neuropathy demyelinating

yes

19

What are the findings in a demyelinating neuropathy

weakness (distal and proximal)
areflexia
decreased vibrational and positional sense with intact pain and temp sensations
slow NCV

20

T or F: typically is the axon is destroyed in demyelinating neuropathy

False-- it is preserved

21

distal weakness with distal areflexia + glove and stocking sensory loss + nml CNV with reduced AP amplitude and denervation on EMG

axonal neuropathy

22

etiology if axonal neuropathy

toxins, uremia

23

vasculitis and trauma cause damage ti myelin and axons and is known as

Wallerian degeneration

24

myelin ovoids are characteristic of

axonal neuropathy

25

higher arched feet + hammer toes + demyelinating disease

charcot-marie-tooth disease

26

mutation and pattern of inheritance in CMT disease

deletions in genes that express myelin basic protein (PMP 22(1A) or (1B))

AD

27

pathogenesis of diabetic neuropathy

accumulation of sorbitol --> Inc ROS
deficiency of myoinositol

28

diabetic opthalmoplegia affect CN ____

III
*infarcts in the N

29

What neoplasm can cause a neuropathy

lymphoma (invades nerves)

30

are reflexes present in Guillain Barre?

no

31

are sensory nerves affected in guillian barrre

no

32

What is characteristcaly found in the spinal fluid of patients with Guillian Barre?

elevated spinal fluid protein

33

how is the H reflex and F response affected in GBS? why?

prolonged, due to demyelination

34

How is GBS treated?

gamma globulin infusions + respiratory assistance
Corticosteroids do NOT work!!

35

presentation of chronic inflammatory neuropathy

areflexia
symmetrical prox and distal weakness
loss of position and vibratory sense
nml pain and temp sensation
slow NCV (= there is a block due to de-meylination)
may be relapsing
elevated spinal fluid protein

36

treatment for chronic inflammatory neuropathy

GCS, immunosuppressant, gamma globulins