Neurophysiology_ONE

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

• 34 cm

• 35 mm

• 36 mm

• 37 cm

What input voltage is necessary to give a calibration deflection between 5 and 10 mm if the sensitivity is 30µV/mm

• 10 µV

• 50 µV

• 100 µV

• 200 µV

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

• clipping of the waveform

• a two-fold increase in amplitude

• a one-half reduction of amplitude

• no effect on the activity being recorded

In Transcranial Magnetic Stimulation, the corticospinal excitability of human subjects is often determined through identifying the

• coil orientation

• motor threshold

• sensory threshold

• distance threshold

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

• F5

• LOC

• T1 or F9

• F7 or F8

Shortened Waves I–V interpeak latency (IPL) is seen in which of the following conditions?

• Brainstem glioma

• Cochlear hearing loss

• Conductive hearing loss

• Multiple sclerosis (MS) plaque in brainstem

A 60-year-old man with low back pain has a tibial H-reflex testing performed. The afferent and efferent loops of the H-reflex are

• antidromic sensory and antidromic motor

• antidromic sensory and orthodromic motor

• orthodromic sensory and antidromic motor

• orthodromic sensory and orthodromic motor

Which of the following is true regarding somatosensory evoked potential (SSEP) changes during intraoperative operative monitoring (IOM)?

• Transient intraoperative SSEP changes do not predict postoperative SSEP deterioration

• Persistence of SSEP changes at the end of surgery increases the risk of adverse postoperative clinical outcome

• Transient or persistent changes in central conduction time (CCT) compared to baseline occur in a small number of patients

• Transient intraoperative SSEP changes can be associated with adverse postoperative clinical outcome in 25% of patients

When recording for electrocerebral inactivity (ECI), the interelectrode distance should be at least

• 7 cm

• 10 cm

• 12 cm

• 14 cm

Six to seven Hz theta activity is typically seen in a normal adult in which of the following

• in the occipital regions

• at the onset of drowsiness

• in the centro-temporal regions during photic stimulation

• in low voltage, paroxysmal bursts over the frontal regions