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28 Cards in this Set
- Front
- Back
The common mode rejection ratio is usually 10,000:1 but hypothetically imagine another instrument, in which the CMR is 100,000:1. If 60 hz interference reach these 2 inputs of the amp, how much of it will actually be amplified? |
1 microvolt |
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The EEG change most often seen w/ Sturge-Weber syndrome is |
Voltage depression over the affected hemisphere. |
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Midline theta rhythm is a 5-7 hz "spiky" waveform which occurs in the frontocentral vertex head regions and is found in what % of the general population? |
20-40% |
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___ causes decreased carbon dioxide, vasoconstriction and decreased peripheral blood flow. |
Hypocapnia, hyperventilation, cheyne-stroke breathing, valsalva maneuver. |
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Of extended duration; slow to develop: |
Chronic |
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Most sz are |
Idiopathic |
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Why is the Wilson lawsuit an important market in EEG tech? |
Back (Definition) |
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In normal pts, frontal and anterior temporal electrodes may record _____, indicating the onset of drowsiness. |
SEMS |
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Fast Fourier transform |
The method which converts EEG data from time domain to the freq domain |
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Epilepsy is __ |
A collection of diseases and syndromes united by the occurrence of sz |
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Front (Term) |
Diffusely slow w/ onset of Beta |
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Inflammation of the spinal cord. |
Myelitis |
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Certain atomic nuclei w/ an odd # of protons or neutrons or both are subjected to be strong magnetic field and the radiated electromagnetic signal Are analyzed. These signals are then constructed into imagines. |
MRI |
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Mvt of cancer cells from 1 part of the body to another |
Metastasis |
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Midbrain 1. The part of the brain developed from the middle of the 3 primary vesicles of the embryonic neural tube, comprising the tectum and the cerebral peduncles. The middle of the 3 primary brain vesicles in the embryo, lying between the prose cephalon and the rhombus cephalon. Messncephal |
Mesencephalon |
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Growing worse; cancerous; resisting tx |
Malignant |
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EOG refers to: |
Electrooculogram, eye mvt monitoring electrode |
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Sleep spindles are seen ___ |
Usually within the beta freq band, central and frontocentral head region, are often seen in stage II sleep |
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Breach rhythm is produced by___. |
A skull defect |
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Front (Term) |
Diffusely slow w/ onset of Beta |
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Cyclically increasing and decrease respiratory depth and rate, separate by apneic phases, suggesting bilateral deep cerebral hemispheric of diencephalic dysfunction or may be produced by any encephalopathic state: |
Cheyne- Stroke respiration |
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Around blood vessel |
Perivascular |
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Lateral rectus spikes would be most likely to be recorded in which of the following electrodes? |
F7 or F8 |
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Sometimes Mvts are the direct result of paroxysmal discharge. Which of the mvts listed are likely caused by a paroxysmal discharge? |
Myoclonic jerk |
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Spectral characteristics |
The relative contribution of delta, theta, alpha and beta in an EEG recording |
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Horizontal resolution |
Dictates freq resolution of the digitized signal |
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Vertical resolution |
Dictates amp resolution and is usually 12 bits |
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Screen display |
In older instruments may cause poor display resolution of both amp and freq |