2026 FULL QUESTIONS AND ANSWERS
GUARANTEED TO PASS
●● EEG: Methods
1) Techniques
-Hyperventilation
-Photic Stimulation
-Sleep deprivation
-Sedation
-Supplementary Electrodes
-Video Use
- Response Testing/interviewing
-Reactivity
-Cerebral death criteria
- Electrode placement
-Trendline/quantification
-Montage selection
-MEG
-Electrocorticography/cortico-mapping
-Other: applications/indications & Limitations in ambulatory, scalp or
intracranial.
,Answer: MEG - tangential dipoles (NOT RADIAL)
HV: Decrease PaCO2 and Increases PAO2
HV induced slowing:
- abrupt/gradual buildup of rhythmic, <500 uV delta-theta, resolves
within 1 min of HV cessation
-
HV contraindicated: recent ICH, Moyamoya, Sicke Cell,
Cardiopulmonary disease, large vessel stenosis
●● Brain Death ACNS Criteria.
Answer: - Minimum of 8 scalp electrodes
- Impedence: 100 - 10k ohms
- integrity must be verified through recording system
- IE Distance at least 10 cm
- Sensitivity 2 uv/mm x 30 minutes
- Appropriate filter settings
- Additional monitoring if necessary
- No reactivity to afferent stimulation
- Completed by a qualified tech
- Repeat EEG if doubt of ECI
,If <2 months: need 2 separated 48 hours
If 2-12 months: need 2 separated by 24 hours
●● Photic Stimulation
- Evolution of Driving
- Responses.
Answer: Evolution:
Seen at 3-4 months.
<8 Hz for 3-5 years of age
6-16 Hz for 6-12 yrs of age
Photoparoxysmal response: GSW wo correlate
Photoconvulsive: +CC
Photomyoclonic: +MS (Frontalis>orbicularis Oculi)
Photoelectric: changes at anterior channels that resolve with shielding
light
●● EEG: Methods
2) Artifacts :
- Electrode pop
, -Photoelectric
-Salt bridge
-Movement
-Muscle
-Eye movements/eye flutter
-Rectus muscle spikes
-Interelectrode distance errors
-glossopharyngeal
-machine/ventilator
-60 Hz
- dissimilar metals
- bruxism
- fluid collection
- breach
- sweat
- suck
- pulse
- EKG
- Other: Bed Motion, Patting, IV drip, ICU.
Answer:
●● EEG: Basic Patterns --> Maturational/State/ Age related changes