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23 Cards in this Set
- Front
- Back
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Ground is placed at the _______ |
Vertex |
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Electrode placement sites for VEP monitoring are labeled _____, ______, and ______ |
LO, MO, RO |
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The ______ system of electrode placement is used for VEP |
Queen Square System |
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Replication at least |
2 responses |
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Analysis time |
250ms |
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System bandpass |
1-100 Hz |
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Contrast directly affects the _____ and _____ of the VEP |
waveform amplitude ad latency |
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Pattern presented to small sector of visual field |
Partial-field stimulus |
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Pattern presented to 1/2 of the visual field |
half-field or hemi-field stimulus |
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Pattern restricted to small region of central vision c |
entral-field stimulus |
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Pattern that extends equally to both side of fixation point |
full-field stimulation |
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W:_______, D:________, B:_________ |
Width in mm, Distance from screen in mm, B visual angle in minutes of arc |
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Formula to calculate visual angle |
B=arctan W/D |
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Individual units of a pattern are specified in terms of their |
Visual angle |
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Activity following N___ is highly variable |
N145 |
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N75, P100, N145 re recorded over the |
occiput |
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Latency of response occurs around |
100ms |
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Test results should demonstrate a peak ______ response |
positive |
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To avoid fatigue, subjects should not be placed closer than _____ to the stimulus |
70cm |
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Defocusing of the pattern will affect____, ____, and _____ |
latency, amplitude, and morphology |
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Most widely used pattern stimulus |
Checkerboard |
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Rep rate that produces steady-state VEPs |
High, over 10/s |
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Rep rate that produces transient VEPs |
Low, up to 4/s |
