Nervous System Flashcards Preview

USMLE Step 3 Secrets > Nervous System > Flashcards

Flashcards in Nervous System Deck (26):
1

Normal CSF: Cells

0-3

2

Normal CSF: Glucose

50-100

3

Normal CSF: Protein

20-45

4

Normal CSF: Pressure

100-200 mm H2O

5

CSF: Bacterial meningitis

Cells >1000 PMN
Gluc <50
Protein 100 (high)
Pressure > 200

6

CSF: Viral/aseptic meningitis

Cells >100 lymphocytes
Gluc Nml
Protein Nml/Slightly Increased
Pressure Nml/Slightly Increased

7

CSF: Pseudotumor cerebri

Cells nml
Protein nml
Gluc nml
Pressure >200

8

CSF: Guillain-Barre syndrome

Cells 0-100 lymphocytes
Gluc nml
Protein >100
Pressure nml

9

CSF: Cerebral hemorrhage

Cells bloody
Gluc nml
Protein >45
Pressure > 200

10

CSF: Multiple Sclerosis

Cells nml/slightly increased lymphocytes
Gluc nml
Protein nml/slightly increased
Pressure nml

11

Fasciculations, atrophy, decreased or no reflexes

Lower motor neuron disease (or possibly muscle problem)

12

Hyperreflexia, clonus, increased muscle tone

Upper motor neuron lesion (cord or brain)

13

Apathy, inattention, disinhibition, labile affect

Frontal lobes

14

Broca (motor) aphasia

Dominant frontal lobe

15

Wernicke (sensory) aphasia

Dominant temporal lobe

16

Memory impairment, hyperaggression, hypersexuality

Temporal lobes

17

Inability to read, write, name or do math

Dominant parietal lobe

18

Ignoring one side of the body (hemineglect), trouble with dressing

Nondominant parietal lobe

19

Visual hallucinations/illusions

Occipital lobes

20

Cranial Nerves 3 & 4

Midbrain

21

Cranial Nerves 5-8

Pons

22

Cranial nerves 9-12

Medulla

23

Ataxia, dysarthria, nystagmus, intention tremor, dysmetria, scanning speech

Cerebellum

24

Dysmetria

undershoot or overshoot on finger-to-nose

25

Most common causes for delirium or unconsciousness w/o hx of trauma

1. Hypoglycemia
2. Opioid overdose
3. Thiamine

26

What should be administered prior to glucose in a suspected alcoholic?

Thiamine