CNIM Frequent Miss| 157 Questions| With Complete Solutions

A patient with a body temperature of 30 degrees C will have: A- Decreased latencies B- Decreased latencies, decreased amplitudes C- Increased latencies D- Increased latencies, decreased amplitudes correct answer: C- Increased latencies The P31 response to posterior tibial nerve stimulation: A- Is recordable over a generalized region of scalp B- Is best recorded by an electrode placed at CS5 C- Is generated by the thalamus D- Reflects post-synaptic activity in the cervical spinal cord correct answer: A- Is recordable over a generalized region of scalp Why are SSEP and MEP used simultaneously? A- Because MEPs indicate spinothalamic tract function B- Spinal cord damage can occur in only one tract causing loss of MEP but not SSEP C- Because SSEP monitoring alone is not very sensitive to changes in spinal cord function D- All of the above correct answer: B- Spinal cord damage can occur in only one tract causing loss of MEP but not SSEP If the bin width of you system is 20 μS, then the highest frequency signal that can be resolved is: A- 50 KHz B- 100 KHz C- 25 KHz D- 20 KHz correct answer: C- 25 KHz EEG will most likely disappear at what body temperature? A- 16 º C B- 36º C C- 23 º C D- 28º C correct answer: A- 16 º C What will be the frequency of a signal if in a 30 mS sweep the interval between each cycle of the signal is 0.03 mS? A- 3333 KHz B- 33 KHz C- 333 KHz D- 3 KHz correct answer: B- 33 KHz According to the Guidelines what is the acceptable sweep for ABR's? A- 20-30 msec