ECOG/EP for CLTM UPDATED Exam
Questions and CORRECT Answers
nearfield, post-synaptic activity in cervical spinal cord - CORRECT ANSWER - N13
far-field, caudal medial/leminsicous (AEP) - CORRECT ANSWER - P14
far-field, post-synaptic activity from several sites in the brain stem and thalamus - CORRECT
ANSWER - N18
near-field, somatosensory cortex potential - CORRECT ANSWER - N20
median generator sites - CORRECT ANSWER - N13
P14
N18
N20
electrode impedance with ECOG - CORRECT ANSWER - higher- placement is unstable
reference electrode in ecog - CORRECT ANSWER - placed away from active electrodes
in the subgleal space
LFF in ecog - CORRECT ANSWER - can be raised to 5-10 Hz
primary interest is spikes- not slow waves
responses required in cortical SSEP ecog - CORRECT ANSWER - response is much larger
than scalp-recorded
less than 100 average responses are needed
, OR troubleshooting - CORRECT ANSWER - -ask surgeon to stop electrocautery
temporarily to document the artiface
-60 Hz notch is prohibited
-primary non-electrical issue is effect of anesthesia
-other issues include vital signs and positioning
positioning during ecog - CORRECT ANSWER - avoid hyperextension of joints
can be adjusted slightly to reduce discomfort during craniotomy (stiffness)
true or false: longer latency potentials are more sensitive to anesthesia - CORRECT
ANSWER - true
which are less affected by anesthesia in ecog:
P26, N30, P40, N60 OR P14 and N20 (subcortical and 1st cortical potentials) - CORRECT
ANSWER - P14 and N20
subcortical and 1st cortical potentials
effect of halogenated inhalation agents in ecog/ep - CORRECT ANSWER - attenuate or
abolish EP and prolong latencies
true or false: TCMEPs are much more sensitive than SSEP - CORRECT ANSWER - true
commonly used inhalation anesthetics - CORRECT ANSWER - nitrous oxide (N2O)
halothane
desflurane
isoflurane
Questions and CORRECT Answers
nearfield, post-synaptic activity in cervical spinal cord - CORRECT ANSWER - N13
far-field, caudal medial/leminsicous (AEP) - CORRECT ANSWER - P14
far-field, post-synaptic activity from several sites in the brain stem and thalamus - CORRECT
ANSWER - N18
near-field, somatosensory cortex potential - CORRECT ANSWER - N20
median generator sites - CORRECT ANSWER - N13
P14
N18
N20
electrode impedance with ECOG - CORRECT ANSWER - higher- placement is unstable
reference electrode in ecog - CORRECT ANSWER - placed away from active electrodes
in the subgleal space
LFF in ecog - CORRECT ANSWER - can be raised to 5-10 Hz
primary interest is spikes- not slow waves
responses required in cortical SSEP ecog - CORRECT ANSWER - response is much larger
than scalp-recorded
less than 100 average responses are needed
, OR troubleshooting - CORRECT ANSWER - -ask surgeon to stop electrocautery
temporarily to document the artiface
-60 Hz notch is prohibited
-primary non-electrical issue is effect of anesthesia
-other issues include vital signs and positioning
positioning during ecog - CORRECT ANSWER - avoid hyperextension of joints
can be adjusted slightly to reduce discomfort during craniotomy (stiffness)
true or false: longer latency potentials are more sensitive to anesthesia - CORRECT
ANSWER - true
which are less affected by anesthesia in ecog:
P26, N30, P40, N60 OR P14 and N20 (subcortical and 1st cortical potentials) - CORRECT
ANSWER - P14 and N20
subcortical and 1st cortical potentials
effect of halogenated inhalation agents in ecog/ep - CORRECT ANSWER - attenuate or
abolish EP and prolong latencies
true or false: TCMEPs are much more sensitive than SSEP - CORRECT ANSWER - true
commonly used inhalation anesthetics - CORRECT ANSWER - nitrous oxide (N2O)
halothane
desflurane
isoflurane
