ASET 2007 Questions 1-100

In a record with 10 Hz alpha activity. When the display epoch is changed from 10 seconds per display screen to 20 seconds per display screen, the frequency of the activity will be ____.

10 Hz

According to ACNS Guidelines, Recording Clinical EEG on Digital Media requires monitors to have between ___& _____ mm/second horizontal scaling and a (minimum/maximum) of _____ data points /second to accurately display EEG on the monitor screen.

25 and 35 mm/second minimum 100 data points

The ratio of chest compressions to breaths in one-person CPR is _____.

30:2

The distance from Cz to Pz is 6.8 cm. What is the distance from nasion to inion?

34 cm

Time constant is defined as the time required for the deflection to fall ____ % of the peak deflection.

37%

A high frequency setting of 35 Hz would attenuate 50 Hz muscle activity by approximately what percentage?

40%

An asymmetry of the occipital alpha rhythm voltage from the two hemispheres should be no greater than:

50%

What is the resting potential of a neuron?

50-100 mV with the inside of the cell more negative than the outside

Which of the following is not a physiological artifact? a. perspiration b. glossokinetic response c. 60 Hz interference d. eye movement

60 Hz interference

In the illustration above, which electrode is active and what is the polarity? a. F7 and negative b. A1 and negative c. F8 and negative d. F4 and positive

A1 and negative

The basic unit for measuring current flow is:

Ampere

When recording for ECI, interelectrode impedances should be at least ____ ohms, but less than ____ ohms.

At least 100, but less than 10,000

This test is useful in the diagnosis of multiple sclerosis, pontine angle tumors, coma and brain death. a. visual evoked potential b. brainstem auditory evoked potential c. myelogram d. angiogram

Brainstem auditory evoked potential

The tracts connecting the right and left hemispheres are called the ____.

Corpus Callosum

Channel A in the figure above has been recorded utilizing standard instrumentation settings. What instrument change has been made to channel B?

Decrease low frequency filter

The "dance-like" movements of the head and extremities may be exhibited in a patient with which hereditary degenerative disease?

Huntington's Chorea

Which of the following is not a characteristic of REM sleep? a. low voltage mixed frequency EEG activity b. reduced EMG activity c. saw tooth waves d. K-Complexes

K-complexes

During the recording of cerebral activity, the calibration input voltage is changed from 50 μV to 100 μV. What will be the result?

No effect on the activity being recorded

The basic unit of resistance is:

Ohm

Which condition is characterized by rigidity, tremors and festination? a. Huntington's chorea b. Alzheimer's disease c. Friedreich's ataxia d. Parkinson's disease

Parkinson's Disease

Substantia nigra is affected in what disorder?

Parkinsonism

Due to a central scalp lesion, C4 has to be relocated 4 mm anteriorly. Should the technologist make any changes to any other electrodes, and if so, what change(s)?

Relocate C3 4 mm anteriorly as well

The presence of sleep spindles and V-waves in the EEG signals what stage of sleep?

Stage 2

Port wine stain is associated with what disorder?

Sturge-Weber Syndrome

The electrode site that is located 1 cm above, one third the distance out from the left external auditory meatus toward the left outer canthus is called ____.

T1 or F9

A patient can become the pathway for least resistance and therefore electrically susceptible to shock when ____.

The patient has an indwelling heart catheter

Positron Emission Tomography (PET) is used for _____.

Visualizing the metabolism of the brain

The homunculus is a ____.

a representation of the motor and sensory cortex of the brain

Which of the following is not a valid expression of Ohm's law? (in this equation E (electromotive force) is the dame as V (Voltage) a. R = E I or (R = V I) b. E = I R or (V = I R) c. I = E / R or (I = V/R) d. R = E / I or (R = V/ I)

a. R= EI or R =VI

13. An EEG record has three per second spike/wave discharges. Both the spike and the slow wave have voltages of 100 μV. If this discharge is recorded with a low frequency filter of 5 Hz and a sensitivity of 10 μV/mm, what would be the deflection of the spike and the wave? a. spike 10 mm, wave 6 mm b. spike 6 mm, wave 10 mm c. spike 10mm, wave 10 mm d. spike 6 mm, wave 6 mm

a. Spike 10mm, wave 6mm

Café-au-lait spots and neurofibromas are associated with ____. a. Von Recklinghousen's disease b. Sturge-Weber Syndrome c. Friedreich's ataxia d. Spina bifida

a. Von Recklinghousen's disease

The use of nasopharyngeal or T1/T2 aka F9/F10 electrodes are most helpful in recording epileptiform discharges associated with ____. a. complex partial seizures b. absence seizures c. partial motor seizures d. tonic-clonic seizures

a. complex partial seizures

Which infection is most likely to produce headache, fever, nuchal rigidity, coma, and death? a. meningitis b. herpes simplex encephalitis c. subacute sclerosing panencephalitis d. Creutzfeldt-Jacob disease

a. meningitis

A combination of electronic components designed to increase the power, voltage or current of a signal

amplifier

In a referential montage, how is the origin of the potential determined?

amplitude

When recording for electrocerebral inactivity (ECI), the interelectrode distance should be at least ____. a. 7 cm b. 10 cm c. 12 cm d. 14 cm

b. 10 cm

A spike is printed out on paper and measures 16 mm peak to peak, the sensitivity of the instrument is 7 μV/mm and a calibration signal of 50 μV causes a deflection of 7.1 mm. What is the voltage of the spike? a. 1.2 μV b. 112 μV c. 12 μV d. 24 μV

b. 112 uV

The filters creating a very narrow band pass that should rarely be used clinically are _____. a. LF 5.0 Hz and HF 70 Hz b. LF 5.0 Hz and HF 15 Hz c. LF 0.1 Hz and HF 70 Hz d. LF 0.1 Hz and HF 15 Hz

b. LF 5.0 Hz and HF 15 Hz

Without dietetic treatment, this hereditary disease may cause mental retardation and infantile spasms. a. Down's syndrome b. Phenylketonuria c. Tay-Sach's disease d. Sturge-Weber's disease

b. Phenylketonuria

Which of the following is not a unit for measuring alternating frequencies? a. Cycles per second b. Volts c. Hertz d. Kilocycles

b. Volts

The International Classification of Epilepsies and Epileptic Syndromes places juvenile myoclonic epilepsy under what category? a. localization-related epilepsies b. generalized epilepsies and syndromes c. special syndromes d. epilepsies and syndromes undetermined as to whether they are focal or generalized

b. generalized epilepsies and syndromes

Photic driving ____. a. is an abnormal response to photic stimulation b. may or may not be present in a normal EEG recording c. always precedes a photo-convulsive response d. must be of equal amplitude over both hemispheres to be considered normal

b. may or may not be present in an normal EEG recording

Which electrodes do not record directly from the brain? a. depth b. subdermal c. subdural d. epidural

b. subdermal

If a seizure discharge causes the waveforms in the channels to square off and run into each other, what should be done? a. the calibration input voltage should be decreased b. the sensitivity should be increased from 7uV/mm to 10, 15uV/mm c. the analysis time/time base/epoch should be decreased d. the high frequency filter should be decreased

b. the sensitivity should be increased from 7 to 10, 15

Herniation of the uncus results in compression of which cranial nerve? a. first b. third c. eighth d. twelfth

b. third

According the ACNS Guidelines 2006, the minimum sampling rate for EEG data, should be at least _____ times the highest high frequency filter setting. a. two b. three c. four d. ten

b. three

A subarachnoid hemorrhage occurs where:

between 2 layers of the meninges

The midbrain, pons and medulla comprise the ____.

brainstem

Guidelines for recording digital EEG are written by: a. the American Society of Electroneurodiagnostic Technologists (ASET) b. The American Academy of Neurology (AAN) c. The American Clinical Neurphysiology Society (ACNS) d. The Organization of Societies of Electrophysiological Technology (OSET)

c. The American Clinical Neurophysiology Society (ACNS)

Six to seven Hz theta activity is typically seen in a normal adult in which of the following? a. in the occipital regions b. in the centro-temporal regions during photic stimulation c. at the onset of drowsiness d. in low voltage, paroxysmal bursts over the frontal regions

c. at the onset of drowsiness

When seen in the waking records of adolescents, posterior slow waves of youth ____. a. are a non-specific abnormality b. are diagnostic of migraine headaches c. attenuate when the patient opens his/her eyes d. attenuate with fist clenching

c. attenuate when the patient opens his/her eyes

A normal waking and sleeping adult EEG recording will not include this feature. a. rhythmic temporal theta b. diffuse low amplitude beta c. delta range activity during alert states d. vertex sharp waves

c. delta range activity during alert states

When recorded from over or near a burr hole, the EEG may show ____. a. no asymmetries b. lower amplitude activity over the affected area c. higher amplitude activity over the affected area d. slower frequencies over the affected area

c. higher amplitude activity over the affected area

Activation of an absence seizure is most consistently obtained during ____. a. sleep b. photic stimulation c. hyperventilation d. eye opening and closing

c. hyperventilation

Normal alpha, in an adult, should not be seen ____. a. in the central and temporal head regions b. with the eyes closed c. in the frontal head regions d. in the occipital head regions

c. in the frontal head regions

Which of the following is not a source of 60 Hz interference? a. other equipment in the room b. faulty ground connection c. intravenous drip d. defects in the power supply

c. intravenous drip

Which of the following would not be considered a normal EEG pattern for a full term infant? a. trace′ alternant b. isolated frontal sharp waves c. persistent focal alpha frequency activity d. beta-delta complexes in quiet sleep

c. persistent focal alpha frequency activity

Which of the following best describes lambda waves? a. 8-10 Hz activity present in the central regions b. posterior, polyphasic waves seen in adolescents c. transients in the occipital regions present with visual scanning d. delta waves that phase reverse at the vertex

c. transients in the occipital regions present with visual scanning

The term "xanthochromic" is usually used in reference to ____. a. cerebral spinal fluid b. dysmorphic features c. ventricular size d. nerve conduction time

cerebral spinal fluid (xantho = yellow, chroma= color)

A patient with sensory aphasia will have difficulty ____. a. comprehending the meaning of words or phrases b. forming words normally c. reading and writing d. smelling and tasting

comprehending the meaning of words or phrases

Thrombosis of the anterior cerebral artery is most likely due to cause ____.

contralateral lower extremity weakness

Which of the following is most attenuated by a low frequency filter of 1 Hz? a. 0.5 Hz b. 5.0 Hz c. 10.0 Hz d. 0.1 Hz

d. 0.1 Hz

What input voltage is necessary to give a calibration deflection between 5 and 10 mm if the sensitivity is 30μV/mm? a. 10μV b. 50μV c. 100μV d. 200μV

d. 200 uV

A family history of epilepsy is especially important to determine the diagnosis of ____. a. complex partial seizures b. pseudo-seizures c. Lennox-Gastaut Syndrome d. Classic absence seizures

d. Classic Absence seizures

The most common symptoms of which type of head injury are a temporary loss of consciousness, followed by confusion, severe headache, and possibly amnesia for the accident? a. contusion b. laceration c. contrecoup d. concussion

d. concussion

Eye leads placed at the outer canthus of each eye will record ____. a. all eye movements b. horizontal and vertical eye movements c. only vertical eye movements d. mainly horizontal eye movements

d. mainly horizontal eye movements

Which of the following is not related to measuring electrode resistance? a. opposition to direct current flow b. measurement while the electrode is unattached to the scalp c. measurement with an ohmmeter d. opposition to alternating current flow

d. opposition to alternating current flow

The term RAM means:

d. temporary memory storage that is critical to rapid computer operations

An action potential is an immediate result of what change in the neural membrane?

depolarization

A patient complaining of right hemiplegia will have ____. a. difficulty moving all extremities b. nonpurposeful movements of the right side of the body c. no vision in the right eye d. difficulty moving the right half of the body

difficulty moving the right half of the body

Interictal discharges in patients with complex partial seizures are most likely to be recorded in the EEG ____. a. during the waking record. b. during photic stimulation c. during Stage I sleep d. during REM sleep

during Stage I sleep

A circuit that allows some frequencies to pass through it, while others are blocked is a:

filter

The central sulcus (fissure of Rolando) demarcates which two brain regions?

frontal and parietal lobes

The pattern, recorded from a drowsy 6 year old, is ____. a. hypnagogic hypersynchrony, a normal finding for age. b. Indicative of a generalized seizure disorder c. Indicative of a focal seizure disorder d. An awake ictal seizure event

hypnagogic hypersynchrony, a normal finding for age

The diencephalon is composed of what brain reigons?

hypothalamus and thalamus

Fasciculation refers to ____. a. abnormal sensation b. quick repetitive speech c. involuntary twitching of muscle fibers d. lacking fine motor skills

involuntary twitching of muscle fibers

Trigeminal nerve function:

is the major sensory nerve of the face

Thrombosis of the right middle cerebral artery would most likely cause _____.

left sided paralysis, primarily of the face and arm

What term is used to describe brainstem injury in a patient who is completely paralyzed except for vertical eye movements? a. contrecoup b. alpha coma c. locked-in syndrome d. diffuse brainstem dysfunction syndrome

locked-in syndrome

The cardiovascular and respiratory centers for automatic control of heart rate and respiration are found in the ____.

medulla

A malignant tumor primarily seen in children may be _______

medulloblastoma

Inflammation of the coverings of the brain or spinal cord is called____

meningitis

A small fluctuating output recorded by the EEG instrument even when there is no input signal is called ____.

noise

When performing an EEG for evaluation of a central nervous system disease that may have infectious etiology, the technologist should ____. a. observe universal precautions b. reschedule the procedure until a definite diagnosis has been made c. not be concerned with any precautionary measures d. request that the electroencephalographer to perform the study

observe universal precautions

A Megabyte of memory is approx equal to how many bytes?

one million bytes

The foramen of Munro is the ______.

opening between lateral ventricles and third ventricle of the brain

Two important functions of the medulla are ____.

respiration and regulation of heart rate

A common seizure pattern in neonates is ____. a. generalized spike and wave b. rhythmic focal activity c. beta-delta complexes d. burst suppression

rhythmic focal activity

When recording for ECI, it is recommended that the sensitivity be ____μV/mm and the low filter should not be higher than ____ Hz for at least ____ mins. of recording.

sens: 2, LFF not higher than 1.0, for 30 mins

Three basic computer ports are:

serial, parallel, usb

The best metals for clinical EEG recording are ___,_____ or ____.

silver-silver chloride, platinum or gold

Wada testing is done to determine____

speech dominance

One benefit to networking EEG instruments is the ability to ____.

store multiple files on a central server

Describe the action of a capacitor:

stores energy

Common Mode Rejection is ____.

the characteristic of an amplifier that rejects external interference

A recommended method of monitoring infusion motor artifact from intravenous (IV) infusion pumps is the place two electrodes on ____. a. the IV tubing b. the infusion pump apparatus c. the outer surface of the patient's hand d. the chest

the infusion pump appartus

The Glasgow Scale is used to determine ____.

the patient's degree of consciousness

Symmetry of sleep spindles, when present, is important in the evaluation of ____. a. the physiological maturation of an infant b. seizures which occur during sleep c. REM sleep d. Spindle coma

the physiological maturation of an infant

The EEG amplifier is designed so that when input 1 is more negative than input 2, the deflection will be ____.

upward

QRS complex refers to ____. a. ventricular excitation of the myocardium b. spinal cord reflex c. herniation of the first 3 cranial nerves d. the tetrad of narcolepsy

ventricular excitation of the myocardium