ACTUAL QUESTIONS AND DETAILED ANSWERS WITH
RATIONALES BRAND NEW | GUARANTEED PASS | A+.
What new imaging techniques help in the placement of ECoG
electrodes?
a. Ultrasound and standard X-Rays
b. Contrast MRI and CT scans
c. Digital photographs and MEG
d. Fusion of functional SPECT and PET scans and structural
MRI - ANSWER-d. Fusion of functional SPECT and PET
scans and structural MRI
How does ECoG activity differ from scalp recorded EEG?
(select all that apply)
-More sharply contoured morphology
-Lower amplitude when recording from the cortex directly
-Higher amplitude
,-Onset decrement or attenuation usually not seen on scalp
recordings because it is so low amplitude it is not recorded
through the scalp and skull - ANSWER--More sharply
contoured morphology
-Higher amplitude
-Onset decrement or attenuation usually not seen on scalp
recordings because it is so low amplitude it is not recorded
through the scalp and skull
Which of the following modalities is LEAST useful to monitor
during surgery for a vertebral artery aneurysm?
a. Lower extremity SSEP
b. Brainstem auditory evoked potential
c. Surface EEG
d. Upper extremity SSEP - ANSWER-c. Surface EEG
In the past many brainstem lesions were considered inoperable
but with modern microsurgical techniques combined with
,neurophysiological mapping, many lesions in this area are now
amenable to surgical intervention.
True or False? - ANSWER-True
How are afterdischarges stopped?
a. IV valium
b. General anesthesia
c. IV antiepileptic drugs
d. Irrigation using cold (4 degrees C) Ringer's applied directly
to the cortex - ANSWER-d. Irrigation using cold (4 degrees
C) Ringer's applied directly to the cortex
Appropriate filter settings for ECoG are:
a. 0.5 Hz to 35 Hz
b. 0.5 Hz to 70 or 100 Hz
c. 5 Hz to 60 Hz
, d. 1 Hz to 70 Hz - ANSWER-b. 0.5 Hz to 70 or 100 Hz
Functional mapping with direct cortical stimulation should
always be done with concurrent electrocorticography:
True or False? - ANSWER-True
Structural functional anatomy may be altered by: (select all that
apply)
a. Pressure
b. Plasticity
c. Current
d. Previous lesions - ANSWER-a. Pressure
b. Plasticity
c. Current
d. Previous lesions