CLTM Board Exam
Questions and Answers| Latest Update| Guaranteed Pass
Certification for Long-Term Monitoring (ABRET)
1. Which lobe is primarily responsible for processing auditory information?
A. Frontal lobe
B. Temporal lobe
C. Parietal lobe
D. Occipital lobe
Answer: B. Temporal lobe
Rationale: The temporal lobe contains the primary auditory cortex (Heschl's
gyrus) and is central to sound processing and language comprehension.
2. The primary motor cortex is located in which gyrus?
A. Precentral gyrus
B. Postcentral gyrus
C. Superior temporal gyrus
D. Cingulate gyrus
Answer: A. Precentral gyrus
Rationale: The precentral gyrus of the frontal lobe houses the primary motor
cortex, which controls voluntary movement.
3. Which structure is most commonly the epileptogenic focus in mesial temporal
lobe epilepsy?
A. Amygdala
, B. Hippocampus
C. Thalamus
D. Cerebellum
Answer: B. Hippocampus
Rationale: Hippocampal sclerosis is the most common pathological substrate
underlying mesial temporal lobe epilepsy.
4. Scalp EEG activity primarily reflects:
A. Axonal action potentials
B. Summated postsynaptic potentials of cortical pyramidal neurons
C. Glial cell metabolism
D. Cerebral blood flow changes
Answer: B. Summated postsynaptic potentials of cortical pyramidal neurons
Rationale: EEG predominantly records summated excitatory and inhibitory
postsynaptic potentials from pyramidal neurons oriented perpendicular to the
scalp.
5. What is the typical frequency range of the alpha rhythm?
A. 0.5-4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. 14-30 Hz
Answer: C. 8-13 Hz
Rationale: Alpha activity is defined as 8-13 Hz, classically posterior-dominant,
and attenuates with eye opening.
6. Beta activity is defined as frequencies:
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: D. Greater than 13 Hz
Rationale: Beta activity comprises frequencies above 13 Hz and is often
enhanced by sedative-hypnotic medications.
,7. Delta activity is defined by which frequency range?
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: A. Less than 4 Hz
Rationale: Delta activity is the slowest EEG frequency band, defined as less
than 4 Hz.
8. Theta activity is defined by which frequency range?
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: B. 4-7 Hz
Rationale: Theta activity falls between 4 and 7 Hz and is prominent during
drowsiness.
9. The corpus callosum is clinically relevant to EEG interpretation primarily
because it:
A. Generates the alpha rhythm
B. Enables rapid interhemispheric transfer contributing to bilateral
synchronous discharges
C. Produces sleep spindles
D. Regulates brainstem arousal
Answer: B. Enables rapid interhemispheric transfer contributing to bilateral
synchronous discharges
Rationale: Interhemispheric callosal connections allow rapid propagation that
underlies bilaterally synchronous discharges such as generalized spike-wave.
10. Which structure functions as the principal generator/pacemaker of sleep
spindles?
A. Hippocampus
B. Thalamic reticular nucleus
C. Occipital cortex
, D. Cerebellum
Answer: B. Thalamic reticular nucleus
Rationale: The thalamic reticular nucleus produces rhythmic GABAergic
inhibition of thalamocortical relay neurons, generating sleep spindles.
Section B: 10-20 Electrode System & Montages
11. In the International 10-20 electrode placement system, the numbers '10' and
'20' refer to:
A. The total number of electrodes
B. Percentages of measured skull distances used to space electrodes
C. Millimeters of spacing between electrodes
D. Minutes required for setup
Answer: B. Percentages of measured skull distances used to space electrodes
Rationale: Electrode sites are placed at 10% and 20% intervals along measured
skull landmark distances (e.g., nasion to inion), giving the system its name.
12. Electrode Fz is located:
A. Left frontal region
B. Midline frontal region
C. Right frontal region
D. Midline parietal region
Answer: B. Midline frontal region
Rationale: The letter 'z' denotes midline; Fz is the midline frontal electrode.
13. By 10-20 system convention, odd-numbered electrode sites are located on
which side of the head?
A. Left
B. Right
C. Midline
D. Posterior only
Answer: A. Left
Rationale: Odd numbers designate left-sided electrodes, even numbers
designate right-sided electrodes, and 'z' designates midline.
Questions and Answers| Latest Update| Guaranteed Pass
Certification for Long-Term Monitoring (ABRET)
1. Which lobe is primarily responsible for processing auditory information?
A. Frontal lobe
B. Temporal lobe
C. Parietal lobe
D. Occipital lobe
Answer: B. Temporal lobe
Rationale: The temporal lobe contains the primary auditory cortex (Heschl's
gyrus) and is central to sound processing and language comprehension.
2. The primary motor cortex is located in which gyrus?
A. Precentral gyrus
B. Postcentral gyrus
C. Superior temporal gyrus
D. Cingulate gyrus
Answer: A. Precentral gyrus
Rationale: The precentral gyrus of the frontal lobe houses the primary motor
cortex, which controls voluntary movement.
3. Which structure is most commonly the epileptogenic focus in mesial temporal
lobe epilepsy?
A. Amygdala
, B. Hippocampus
C. Thalamus
D. Cerebellum
Answer: B. Hippocampus
Rationale: Hippocampal sclerosis is the most common pathological substrate
underlying mesial temporal lobe epilepsy.
4. Scalp EEG activity primarily reflects:
A. Axonal action potentials
B. Summated postsynaptic potentials of cortical pyramidal neurons
C. Glial cell metabolism
D. Cerebral blood flow changes
Answer: B. Summated postsynaptic potentials of cortical pyramidal neurons
Rationale: EEG predominantly records summated excitatory and inhibitory
postsynaptic potentials from pyramidal neurons oriented perpendicular to the
scalp.
5. What is the typical frequency range of the alpha rhythm?
A. 0.5-4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. 14-30 Hz
Answer: C. 8-13 Hz
Rationale: Alpha activity is defined as 8-13 Hz, classically posterior-dominant,
and attenuates with eye opening.
6. Beta activity is defined as frequencies:
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: D. Greater than 13 Hz
Rationale: Beta activity comprises frequencies above 13 Hz and is often
enhanced by sedative-hypnotic medications.
,7. Delta activity is defined by which frequency range?
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: A. Less than 4 Hz
Rationale: Delta activity is the slowest EEG frequency band, defined as less
than 4 Hz.
8. Theta activity is defined by which frequency range?
A. Less than 4 Hz
B. 4-7 Hz
C. 8-13 Hz
D. Greater than 13 Hz
Answer: B. 4-7 Hz
Rationale: Theta activity falls between 4 and 7 Hz and is prominent during
drowsiness.
9. The corpus callosum is clinically relevant to EEG interpretation primarily
because it:
A. Generates the alpha rhythm
B. Enables rapid interhemispheric transfer contributing to bilateral
synchronous discharges
C. Produces sleep spindles
D. Regulates brainstem arousal
Answer: B. Enables rapid interhemispheric transfer contributing to bilateral
synchronous discharges
Rationale: Interhemispheric callosal connections allow rapid propagation that
underlies bilaterally synchronous discharges such as generalized spike-wave.
10. Which structure functions as the principal generator/pacemaker of sleep
spindles?
A. Hippocampus
B. Thalamic reticular nucleus
C. Occipital cortex
, D. Cerebellum
Answer: B. Thalamic reticular nucleus
Rationale: The thalamic reticular nucleus produces rhythmic GABAergic
inhibition of thalamocortical relay neurons, generating sleep spindles.
Section B: 10-20 Electrode System & Montages
11. In the International 10-20 electrode placement system, the numbers '10' and
'20' refer to:
A. The total number of electrodes
B. Percentages of measured skull distances used to space electrodes
C. Millimeters of spacing between electrodes
D. Minutes required for setup
Answer: B. Percentages of measured skull distances used to space electrodes
Rationale: Electrode sites are placed at 10% and 20% intervals along measured
skull landmark distances (e.g., nasion to inion), giving the system its name.
12. Electrode Fz is located:
A. Left frontal region
B. Midline frontal region
C. Right frontal region
D. Midline parietal region
Answer: B. Midline frontal region
Rationale: The letter 'z' denotes midline; Fz is the midline frontal electrode.
13. By 10-20 system convention, odd-numbered electrode sites are located on
which side of the head?
A. Left
B. Right
C. Midline
D. Posterior only
Answer: A. Left
Rationale: Odd numbers designate left-sided electrodes, even numbers
designate right-sided electrodes, and 'z' designates midline.
