CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Which is not a major MoA of the usual anesthetic agents that affect IONM? -
CORRECT ANSWERS Inhibition of nerve conduction velocity
EP modality most affected by propofol - CORRECT ANSWERS Mid-latency
auditory response
Ketamine - CORRECT ANSWERS (NMDA antagonist)
-does NOT act @ GABA synapse
-desirable for peds <6-10 y/o + TCeMEP monitoring
-agent that least depresses SSEPs
-SSEP/MEP = INC amp
-EEG = INC beta
Propofol - CORRECT ANSWERS (GABA agonist)
-SSEP/BAER = INC latency
-EEG = slowing
Etomidate - CORRECT ANSWERS (GABA agonist)
-SSEP/MEP: INC amp
-EEG: slowing
dexmeditomidine (Precedex) - CORRECT ANSWERS (α2-adrenergic
antagonist)
,CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
-mimics nml sleep; awakening --> most nml neuro exam
-associated w/ unconsciousness (NOT amnesia)
-DEC MEP ampmlitudes
Fentanyl - CORRECT ANSWERS (μ-opioid agonist)
-SSEP: mild effect on lat/amp
-EEG: slowing, diffuse Δ
-high dose maintenance --> may not result in EEG burst depression
Succinylcholine - CORRECT ANSWERS depolarizing muscle relaxant
Rocuronium - CORRECT ANSWERS non-depolarizing muscle relaxant
Monitoring mm relaxation is done via TOF. How is relaxation measured? -
CORRECT ANSWERS By counting the # of mm responses to 4 stimuli @ 2 Hz
Barbiturate effect on EEG - CORRECT ANSWERS burst suppression
phenytoin (Dilantin) - CORRECT ANSWERS anticonvulsant (NaV channel
blocker)
-should be excluded before ECoG for inter-ictal discharges
,CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Advantages of general anesthesia during CEA - CORRECT ANSWERS -
prevents pt mvmnt; provides brain protection & rapid BP control
-does NOT provide measurement of brain activity
Anesthesia optimal BIS range - CORRECT ANSWERS 40-50
Which least affects the neurogenic response to SC stimulation? - CORRECT
ANSWERS Anesthetic agents > NMBs, hardware insertion, current shunting
from irrigation
Anesthesia is started & pt is intubated. No MEP responses for 15-20 min after
induction. Which muscle relaxant was used? - CORRECT ANSWERS
Succinylcholine
Latency Δ's are caused by effects on - CORRECT ANSWERS Na+ channel
receptors
Etomidate/ketamine/methohexital are used in low doses to elicit/enhance: -
CORRECT ANSWERS seizure foci during EcoG
DEC HCT - CORRECT ANSWERS INC RBC velocity
Nitroprusside - CORRECT ANSWERS (breaks down to NO --> vasodilator)
DEC's BP
, CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Unstable BP effects on cortical SSEPs - CORRECT ANSWERS fluctuating
amplitudes
Glucose is monitored & treated during surgery bc: - CORRECT ANSWERS -
high/low BG levels = associated w/ worsened neurological injury
-Glc produces intracellular acidosis during ischemia
Pt presentation for acoustic neuroma: - CORRECT ANSWERS hearing loss,
HA, unsteady gait
Most important step to setting up BAERs? - CORRECT ANSWERS placing
foam inserts
Least important considerations during intra-op BAERs - CORRECT ANSWERS
Anesthetic considerations < BP, local cooling, core body temp
BAER waveforms cannot be recorded in the following conditions: - CORRECT
ANSWERS -bone drilling
-30 dB pe SPL (intensity levels)
-"kinking" of the sound delivery tube
BAER stim/RR - CORRECT ANSWERS -<20 Hz (optimal amplitude)
-10-19 Hz range
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Which is not a major MoA of the usual anesthetic agents that affect IONM? -
CORRECT ANSWERS Inhibition of nerve conduction velocity
EP modality most affected by propofol - CORRECT ANSWERS Mid-latency
auditory response
Ketamine - CORRECT ANSWERS (NMDA antagonist)
-does NOT act @ GABA synapse
-desirable for peds <6-10 y/o + TCeMEP monitoring
-agent that least depresses SSEPs
-SSEP/MEP = INC amp
-EEG = INC beta
Propofol - CORRECT ANSWERS (GABA agonist)
-SSEP/BAER = INC latency
-EEG = slowing
Etomidate - CORRECT ANSWERS (GABA agonist)
-SSEP/MEP: INC amp
-EEG: slowing
dexmeditomidine (Precedex) - CORRECT ANSWERS (α2-adrenergic
antagonist)
,CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
-mimics nml sleep; awakening --> most nml neuro exam
-associated w/ unconsciousness (NOT amnesia)
-DEC MEP ampmlitudes
Fentanyl - CORRECT ANSWERS (μ-opioid agonist)
-SSEP: mild effect on lat/amp
-EEG: slowing, diffuse Δ
-high dose maintenance --> may not result in EEG burst depression
Succinylcholine - CORRECT ANSWERS depolarizing muscle relaxant
Rocuronium - CORRECT ANSWERS non-depolarizing muscle relaxant
Monitoring mm relaxation is done via TOF. How is relaxation measured? -
CORRECT ANSWERS By counting the # of mm responses to 4 stimuli @ 2 Hz
Barbiturate effect on EEG - CORRECT ANSWERS burst suppression
phenytoin (Dilantin) - CORRECT ANSWERS anticonvulsant (NaV channel
blocker)
-should be excluded before ECoG for inter-ictal discharges
,CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Advantages of general anesthesia during CEA - CORRECT ANSWERS -
prevents pt mvmnt; provides brain protection & rapid BP control
-does NOT provide measurement of brain activity
Anesthesia optimal BIS range - CORRECT ANSWERS 40-50
Which least affects the neurogenic response to SC stimulation? - CORRECT
ANSWERS Anesthetic agents > NMBs, hardware insertion, current shunting
from irrigation
Anesthesia is started & pt is intubated. No MEP responses for 15-20 min after
induction. Which muscle relaxant was used? - CORRECT ANSWERS
Succinylcholine
Latency Δ's are caused by effects on - CORRECT ANSWERS Na+ channel
receptors
Etomidate/ketamine/methohexital are used in low doses to elicit/enhance: -
CORRECT ANSWERS seizure foci during EcoG
DEC HCT - CORRECT ANSWERS INC RBC velocity
Nitroprusside - CORRECT ANSWERS (breaks down to NO --> vasodilator)
DEC's BP
, CNIM - ABRET PRACTICE EXAM QUESTIONS AND
ANSWERS UPDATED 2024/2025 ALL ANSWERS 100%
CORRECT VERIFIED BEST GRADED A+ FOR SUCCESS
Unstable BP effects on cortical SSEPs - CORRECT ANSWERS fluctuating
amplitudes
Glucose is monitored & treated during surgery bc: - CORRECT ANSWERS -
high/low BG levels = associated w/ worsened neurological injury
-Glc produces intracellular acidosis during ischemia
Pt presentation for acoustic neuroma: - CORRECT ANSWERS hearing loss,
HA, unsteady gait
Most important step to setting up BAERs? - CORRECT ANSWERS placing
foam inserts
Least important considerations during intra-op BAERs - CORRECT ANSWERS
Anesthetic considerations < BP, local cooling, core body temp
BAER waveforms cannot be recorded in the following conditions: - CORRECT
ANSWERS -bone drilling
-30 dB pe SPL (intensity levels)
-"kinking" of the sound delivery tube
BAER stim/RR - CORRECT ANSWERS -<20 Hz (optimal amplitude)
-10-19 Hz range
