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EEG Board Prep
Questions & Answers from ProProfs
| Question | Answer |
|---|---|
| High amplitude slowing can be elicited by _________ & ___________. | HV, Drowsiness |
| Wave with a single deflection either up or down from the baseline | Monophasic |
| What pattern is affected by eye opening & closing? | Posterior Dominant Rhythm |
| Wave that has 2 or more components of a different direction | Polyphasic |
| Term used to describe the shape of a waveform | Morphology |
| Sharply-contoured waveforms that are judged to be ABNORMAL | Sharp Transient |
| Regular waves that are similar to sine waves | Sinusoidal |
| Electrographic Seizure Pattern | Ictal |
| Waveforms that do NOT have a sinusoidal or simple geometric shape | Irregular activity |
| Waveforms associated with and without clinical seizure manifestations | Epileptiform |
| An event that stands out against the background | Transient |
| 2 components on opposite sides of the baseline | Diphasic |
| 1 or more waves that begin abruptly, stands out from the ongoing EEG activity, reaches maximum amplitude rapidly, & disappears suddenly | Paroxysmal |
| Wave with 3 components alternating about the baseline | Triphasic |
| What unit is used to describe amplitude? | Microvolts (uV) |
| Which wave pattern is a disorder with multifocal epileptiform discharges observed using the EEG? | Infantile Spasms |
| Frequency of Delta waves | Less than 4 Hz |
| Frequency of Beta waves | Greater than 13 Hz |
| Frequency of Theta waves | 4-7 Hz |
| The average human brain weighs ___ pounds. | 3 |
| Name the 3 main parts of the brain: | Medulla, Cerebrum, Cerebellum |
| The fluid that surrounds the brain | CSF (Cerebrospinal fluid) |
| What is the name of the 3 membranes that cover & protect the brain? | Meninges |
| Which drugs can be given for Lennox-Gastaut syndrome? | Valproic Acid (Depakote); Felbamate (Felbatol) |
| What is the drug of choice for absence seizures? | Ethosuximide (Zarontin) |
| Phenytoin (Dilantin) toxicity causes the EEG to show: | Increased generalized Theta activity/Slowing of BA |
| Increased Beta in the EEG may be caused by: | Diazepam (Valium) |
| TRUE or FALSE: The EEG will always appear abnormal if the brain is functioning abnormally. | FALSE Normal EEG's may be seen in cases with small lesions or in others with long-standing, mild, & limited cerebral abnormalities. |
| Any wave or sequence of waves is simply referred to as EEG _______. | Activity |
| Which of the following medications can commonly cause increased Theta & Beta activity at therapeutic doses? Antidepressants Chloral hydrate Analgesics Antihistamines | Antidepressants |
| Increased amounts of Beta can be caused by: | Therapeutic doses of barbiturates |
| At what CA (conceptual age) can wake & sleep first be differentiated? | 32-33 weeks CA |
| Which syndrome presents seizures in 3/4 of its' patients & is observed as continuous spike-and-wave during slow sleep & consistent, ictal epileptiform discharges while awake? | Landau Kleffner |
| ECI (electrocerebral inactivity) is defined as no cerebral activity greater than ________ microvolts & a verified electrode impedance with all electrodes testing between ______ to ______ Ohms. | 2; 100-5000 Ohms (5000 Ohms = 5 kOhms) |
| A pattern of stereotyped bursts, usually consisting of mixed frequencies with or without intermixed epileptiform discharges. The bursts usually last 2-10 seconds & are separated by intervals of suppression that demonstrate no electrocerebral activity. | Burst Suppression |
| The most common waveform associated with encephalopathies are _________ waves. | Triphasic |
| The basic unit for measuring current flow | Ampere (Amp) |
| The basic unit of resistance | Ohm |
| In a record with 10 Hz alpha activity, when the display epoch is changed from 10 seconds/screen to 20 seconds/screen, the frequency of the activity will be: | 10 Hz Remember - frequency comes from the PATIENT |
| A partial seizure... | Arises from a localized area of abnormality in 1 part of the brain |
| The olfactory aura preceding a major seizure is: | The hallucination of an unpleasant smell |
| Which structure will most likely be affected first by an anoxic insult? | Cortex |
| FIRDA is seen in: | Adults |
| The central vertex electrode is: | Cz |
| According to the ACNS Guidelines, the minimum sampling rate for EEG data should be at least _____ times the highest frequency filter setting. | 3 |
| Reduction in the amplitude of EEG activity resulting from decreased voltage | Attenuation |
| An increase in voltage & regularity of rhythmic activity | Hypersynchrony |
| A sequence of 2 or more waves, not necessarily of the same frequency, with distinct form or pattern different from background activity | Complex |
| Occipital _____ tends to be slightly asymmetrical. | Alpha |
| This occurs in the Occipital area when the subject intently scans a complex visual field with horizontal eye movement: | Lambda waves |
| A series of surface-positive transients | POSTs |
| Seen distinctly in the central areas, it has a unique reactivity & is blocked by movement: | Mu Rhythm |
| Sharp, slow waves associated with sleep spindles. Midline & predominantly central in origin. | K-Complex |
| Newborns spend ______ of the time in REM sleep. | 50% |
| K-Complexes first appear at approximately what age? | 7 months |
| Pattern that is normal in young childhood sleep, but can be mistaken for an abnormality | Hypnogogic hypersynchrony |
Created by:
JadeHollowell