ALL ANSWERS
2 basic montages used during electrode screening - Answer--1) numeric order bipolar
2) referential
imaging that measures brain synchronicity - Answer--coherence imaging
type of software helpful for quantifying seizures in ICU/EEG - Answer--trending
1st consideration when guarding against skin breakdown - Answer--electrode type
main MEG imaging techniques - Answer---single current dipole (ECD)
-current density/distribution (MR-FOCUSS)
-beamformer (spatial filter)
MRI safe electrodes guard against - Answer--magnetic influence on electrodes
strengths of MEG - Answer---correlates function and anatomy
-millisecond temporal resolution
-millimeter spatial resolution
-non-invasive
Phase II EEG quality is greatly improved by implantation of - Answer--grids for
reference and ground
only imaging technique that is useful for determining seizure focus - Answer--SPECT
MEG detects signals generated by - Answer--pyramidal neurons
weaknesses of MEG - Answer---expensive
-requires magnetically shielded room
, -requires helium
True or False: a pedometer is a type of MEG detector - Answer--false
ACNS recommendation for the time frame of physician interpretation of LTM -
Answer--read data collection after it is complete
cooling below 32 degrees C increases risk of - Answer---focal cerebral deficit
-infection
-coagulopathy
-arrhythmia
unable to form and store new memories - Answer--anterograde amnesia
local networks - Answer---least expensive
-data cannot be viewed remotely
-are like most EMU setups
vertical eye movements will be out of phase with what - Answer--RIO/LIO
effect of benzos on EEG - Answer--increased rhythmic fast (25-35Hz)
decreased alpha voltage
Effect of Carbamazepine on EEG - Answer--mild alpha slowing
random theta
effect of topiramate on EEG - Answer--decreased alpha
increased theta and delta
highest incidence of epilepsy - Answer--over 60 years age group
amplitude scale of y-axis in amplitude EEG graphs - Answer--linear from 0-10mcv
logarithmic from 10-100mcv
seizures in critically ill with encephalopathy: frequency, duration and onset/offset -
Answer--slower frequencies
longer duration
less clearly defined onset, evolution and offset
olfactory aura - Answer--temporal lobe or uncus