CNIM 4| 239 Questions| With Complete Solutions

Which is the most common type of change observed during CEA? A- Ipsilateral EEG slowing, reduced cortical SSEP to contralateral stimulation B- Bilateral EEG slowing, reduced cortical SSEP to bilateral stimulation C- Ipsilateral EEG slowing, reduced cortical SSEP to ipsilateral stimulation D- Contalateral EEG slowing, reduced cortical SSEP to contralateral stimulation correct answer: A- Ipsilateral EEG slowing, reduced cortical SSEP to contralateral stimulation Which of the following would most likely be normal in the pre-operative baseline upper extremity SSEP of a patient with a lesion in the dorsal column? A- Erbs point potential B- N20 C- Central conduction time D- P22 correct answer: A- Erbs point potential Lumbar potential is generated from: A- Pre-synaptic responses B- Spinal ganglion C- Sciatic nerve D- Post-synaptic responses correct answer: D- Post-synaptic responses When placing PF you want the active electrode: A- Lateral to the PF B- Medial to the PF C- Above the PF crease D- Below the PF crease correct answer: C- Above the PF crease Which of the following nerve injuries usually does NOT produce spontaneous EMG activity during intraoperative monitoring? A- Ischemia B- Irrigation C- Pressure D- Heat correct answer: A- Ischemia