[MCQ] Coma- Part 2

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Coma- Part 1| Coma- Part 2| Coma- Part 3| Coma- Part 4

1 Cerebral blood flow is principally influenced by all except ?

A. Systemic blood pressure
B. pH
C. PCO2
D. PO2

2 Volume of CSF within ventricles and surrounding the brain and
spinal cord is about ?
A. 50 mL
B. 100 mL
C. 150 mL
D. 200 mL
3 Cerebral blood volume is about ?
A. 50 mL
B. 100 mL
C. 150 mL
D. 200 mL

4 Cerebral blood flow (CBF) in gray matter is about ?
A. 25 mL per 100 g/min
B. 50 mL per 100 g/min
C. 75 mL per 100 g/min
D. 100 mL per 100 g/min
5 Cerebral blood flow (CBF) in white matter is about ?

A. 10 mL per 100 g/min
B. 20 mL per 100 g/min
C. 30 mL per 100 g/min
D. 40 mL per 100 g/min
6 Mean cerebral blood flow (CBF) is about ?
A. 25 mL per 100 g/min
B. 35 mL per 100 g/min
C. 45 mL per 100 g/min
D. 55 mL per 100 g/min
7 Oxygen consumption of brain tissue is ?
A. 1.5 mL per 100 g/min
B. 2.5 mL per 100 g/min
C. 3.5 mL per 100 g/min
D. 4.5 mL per 100 g/min
8 Glucose utilization of brain tissue is ?
A. 1 mg per 100 g/min
B. 3 mg per 100 g/min
C. 5 mg per 100 g/min
D. 7 mg per 100 g/min
9 After the cessation of blood flow, brain stores of glucose provide
energy for approximately ?
A. 1 min
B. 2 min
C. 3 min
D. 4 min
11 After the cessation of cerebral blood flow, oxygen stores last for
approximately ?
A. 3 to 5 seconds
B. 8 to 10 seconds
C. 12 to 15 seconds
D. 20 to 30 seconds

12 Sodium levels below how much is associated with coma and
convulsions ?
A. 125 mmol/L
B. 120 mmol/L
C. 118 mmol/L
D. 115 mmol/L

13 In hyperosmolar coma, the serum osmolarity is generally more
than ?
A. >280 mosmol/L
B. >300 mosmol/L
C. >320 mosmol/L
D. >350 mosmol/L

14 Disorder that occlude small blood vessels throughout the brain
causing bihemispheral damage is ?
A. Cerebral malaria
B. Thrombotic thrombocytopenic purpura
C. Hyperviscosity
D. All of the above

15 Hypothermia itself causes coma only when the temperature is ?
A. < 34°C
B. < 33°C
C. < 32°C
D. < 31°C

16 Cushing response best relates to ?
A. Hypertension
B. Cyanosis
C. Convulsion
D. Hypothermia

17 Hypotension is characteristic of coma due to ?
A. Profound hypothyroidism
B. Sepsis
C. Alcohol intoxication
D. All of the above

18 On fundoscopic examination, subhyaloid hemorrhage suggests ?
A. Meningococcemia
B. Subarachnoid hemorrhage
C. Bleeding diathesis
D. All of the above

19 Multifocal myoclonus indicates which of the following ?
A. Uremia
B. Haloperidol intoxication
C. Prion disease
D. Any of the above

20 In a drowsy & confused patient, bilateral asterixis is a certain sign
of ?
A. Drug intoxication
B. Cerebral malaria
C. Septicemia
D. Head injury

21 Bilateral damage rostral to the midbrain produces which of the
following ?
A. Extension of elbows & wrists with pronation of arm
B. Flexion of elbows & wrists with supination of arm
C. Arm extension with leg flexion
D. Arm extension with flaccid legs
22 Bilateral damage to motor tracts in midbrain or caudal
diencephalon produces which of the following ?
A. Extension of elbows & wrists with pronation of arm
B. Flexion of elbows & wrists with supination of arm
C. Arm extension with leg flexion
D. Arm extension with flaccid legs

23 Combination of arm extension with leg flexion or flaccid legs is
associated with lesions in ?
A. Basal ganglia
B. Midbrain
C. Pons
D. Medulla oblongata

24 Which of the following is not a brainstem reflex ?
A. Pupillary responses to light
B. Spontaneous and elicited eye movements
C. Corneal responses
D. Jaw jerk