Welcome to your Neurophysiology Name Email 1. [What is the chance that the first routine EEG will be nondiagnostic for epilepsy?] 10% 20% 50% 90% None . 2. [Which of the following findings on a nerve conduction study favors a diagnosis of acquired diffuse demyelinating polyneuropathy?] Decreased compound muscle action potential amplitude Severely decreased conduction velocity Severely prolonged distal latency Abnormal temporal dispersion None . 3. [Which of the following electrodiagnostic findings in acute inflammatory demyelinating polyradiculoneuropathy (AIDP) is the most reliable predictor of poor prognosis?] Severely prolonged distal latency Severely reduced compound muscle action potential (CMAP) amplitude Severely reduced conduction velocity Positive sharp waves and fibrillation potentials None . 4. [A 15-year-old boy presents to his neurologist with slowly worsening gait and weaknessthat he has had for many years. He underwent a peroneal motor study, as shown below. The findings suggest which of the following conditions? (fig)] Charcot–Marie–Tooth (CMT) type 2A CMT type 1 Spinal muscular atrophy Distal myopathy None Comment . 5. [All of the following statements regarding EEG findings in coma are true except] Generalized burst suppression is invariably associated with poor prognosis regardless of etiology Diffuse monomorphic nonreactive alpha activity can be associated with brainstem lesions or hypoxic-ischemic injury Normal sleep features such as spindles may be seen with cyclic variability A pattern of low-voltage irregular (LVI) activity alternating with high-voltage slowing may be seen in patients with Cheyne–Stokes breathing None . 6. [Ictal patterns at the onset of generalized tonic–clonic seizures include all of the following except] Voltage attenuation Paroxysmal beta activity Generalized polyspike-wave discharges Rhythmic 3 Hz sinusoidal activity None . 7. [Which of the following statements is correct regarding the effect of temperature on conduction velocity and latency?] Conduction velocity increases by 1.5–2 m/sec and latency increases by 0.2 ms for every 1°C drop in temperature Conduction velocity decreases by 1.5–2 m/sec and latency increases by 0.2 ms for every 1°C drop in temperature Conduction velocity increases by 1.5–2 m/sec and latency decreases by 0.2 ms for every 1°C drop in temperature Conduction velocity decreases by 1.5–2 m/sec and latency decreases by 0.2 ms for every 1°C drop in temperature None . 8. [Across a resistor in a resistor–capacitor (RC) circuit, the voltage drop is characterized by all of the following except] It is maximal at the outset of an applied square wave pulse It is very sensitive to sudden changes in applied voltage It acts like a high-frequency filter It acts like a high-pass filter None . 9. [The EEG frequency bands described by Hans Berger include] Alpha Alpha and beta Alpha, beta, and theta Alpha, beta, theta, and delta None . 10. [Which of the following correctly lists the order in which the analog signals are converted to digital signals?] Analog signal is sensed, amplified, filtered, and sampled at discrete time intervals Analog signal is sensed, filtered, amplified, and sampled at discrete time intervals Analog signal is sensed, sampled at discrete time intervals, filtered, and amplified Analog signal is sampled at discrete time intervals, amplified, and filtered None . 11. [Which of the following is the neurotransmitter released for the sympathetic neurons innervating sweat glands?] Epinephrine Norepinephrine Acetylcholine Serotonin None . 12. [Which of the following is true regarding electrode impedance when performing an EEG?] It should be more than 5 kΩ for scalp electrodes It is not critical because the electrode–electrolyte interface does not resemble a resistor– capacitor (RC) circuit Large electrode impedances can lead to large artifacts It is increased by removing the scalp oil None . 13. [Which of the following serves as the main mechanism to help move sodium ions into the cell during depolarization?] Passive transport Active transport Facilitated diffusion Transcellular transport None . 14. [Which of the following is the earliest needle EMG change seen in a patient with acute demyelinating polyneuropathy?] Abundant positive sharp waves and fibrillation potentials Polyphasic motor unit potentials Complex repetitive discharges Decreased recruitment of motor units None . 15. [A 44-year-old man presented with increasing shortness of breath and orthopnea. Chestx-ray revealed elevated right hemi-diaphragm. EMG tracing from right hemi-diaphragmbelow reveals (fig)] Active denervation and myopathic motor units with early recruitment Normal changes with respiration Myokymia Neurogenic process with decreased recruitment None Comment . 16. [The following is an EEG from an 11-year-old girl, on no medications, with progressivealteration of mental status. What is the most likely diagnosis? ((fig)] Subacute sclerosing panencephalitis (SSPE) Creutzfeldt–Jakob disease (CJD) Anesthetic effect Chewing artifact None Comment . 17. [What structure is the source of Wave I of the brainstem auditory evoked potential (BAEP)?] Organ of corti Hair cells Cochlear nerve Cochlear nucleus None . 18. [The commonly performed late response nerve conduction studies, F-wave and H-reflex, have certain unique differences. Which of the following statements is correct regarding these 2 late responses?] Both have fixed morphology with repeated stimulations Both have shorter latencies with proximal stimulation Both require supramaximal stimulation Same nerve fibers carry afferent responses for both studies None . 19. [Which of the following statements is true regarding epilepsy associated with brain tumors?] Solid tumors are highly epileptogenic by themselves The seizure focus always localizes to the vicinity of the tumor Low-grade glial tumors are more epileptogenic than high-grade tumors EEG abnormalities in solid tumors are directly related to the tumors themselves None . 20. [The eye movements immediately following markers 1 and 2 are (fig)] Up, down Down, up Left, right Right, left None Comment . 21. [What is the rate of transfer of energy?] Charge Current Capacitance Power None . 22. [An epileptiform spike is characterized by all of the following except] Steep upslope and steep downslope Duration less than 70 ms Wider field in Stage 2 sleep compared with REM sleep Horizontal dipole None . 23. [A 61-year-old African American man presented with recent onset eyelid droopiness and weakness over 4 weeks. He used to lift heavy weights but recently noticed difficulty lifting small objects above his head. A few days before coming to the hospital, he noticed a mild right eye droop. Initial examination was significant for right eye ptosis, facial weakness, mild weakness of neck flexion, and proximal limb weakness. The rest of the strength examination, reflexes, and sensation were normal. What does the study obtained from the right spinal accessory shown below reveal in this patient?] Abnormal decrement consistent with myasthenia gravis (MG) Normal spinal accessory slow repetitive nerve stimulation Abnormal increment consistent with Lambert–Eaton myasthenic syndrome Normal spinal accessory fast repetitive stimulation None . 24. [The P100 waveform latency is increased by which of the following?] Low contrast; low luminance Low contrast; high luminance High contrast; low luminance High contrast; high luminance None . 25. [Subclinical rhythmic electrographic discharge in adults (SREDA) is typically seen during the following scenarios except] Resting state Drowsiness Photic stimulation Hyperventilation (HV) None .
