IONM Final Exam Questions &
Answers (Grade A+)
Which artery supplies blood to the hands and face area of the
somatosensory cortex? -
correct answer ✅Middle Cerebral Artery
While reviewing the history and physical while seeing your patient
in pre-op, you see mention of a grade 1 spondylolithesis. This
means that the patient has what anatomical abnormality? -
correct answer ✅A vertebral body that is displaced anteriorly over
the vertebral body inferior to it
Which blood vessel supply descending motor fibers? -
correct answer ✅Anterior Spinal Artery
Motor evoked potentials are also known as -
correct answer ✅Anodal Stimulation
Trapezius is innervated by what nerve root levels? -
correct answer ✅C2-C4
The ulnar nerve originates from the nerve roots at -
correct answer ✅C7-T1
,IONM Final Exam Questions &
Answers (Grade A+)
The section of the brain stem that is continuous with the spinal
cord and includes the decussating of the pyramids is the -
correct answer ✅Medulla Oblongata
The median nerve originates from nerve roots -
correct answer ✅C5-T1
The spinal cord pathways monitored by SSEPs are -
correct answer ✅The Posterior Columns
What are the warning criteria for TcMEPs? -
correct answer ✅Complete persistent attenuation of the
compound muscle action potential
Motoneuron disease usually is associated with __________ MEP
responses? -
correct answer ✅Absent
Another stimulation method to acquire MEP waveforms is -
correct answer ✅Magnetic Stimulation
,IONM Final Exam Questions &
Answers (Grade A+)
T/F - Neurogenic Motor Evoked Potentials (NMEP) are now thought
to represent primarily an anterior lateral pathway motor response.
-
correct answer ✅False
Which of the following diseases would most inhibit your ability to
monitor posterior tibial nerve SSEPs? -
correct answer ✅Diabetic Neuropathy
Which of D or I waves is more affected by anesthesia? -
correct answer ✅I Waves
TcMEPs monitor which pathway? -
correct answer ✅Corticospinal Tract
For median nerve stimulation, the cathode is placed -
correct answer ✅Between the tendons of the Palmaris longs and
flexor carpi
Intraoperative baseline recordings in somatosensory evoked
potentials are best acquired -
correct answer ✅In the positioned induced patient
, IONM Final Exam Questions &
Answers (Grade A+)
Select NNS TceMEP filter settings -
correct answer ✅HFF (1-3 kHz) LFF (10-30 Hz)
With the referential recording, maximal amplitude cortical evoked
potentials following stimulation of the left posterior tibial nerve
usually would be found between -
correct answer ✅Fz and Cz
T/F - In 20% of patients with spinal cord tumors or Postradiation
Myelopathy D-wave recording is not present even if the muscle
MEP was present -
correct answer ✅True
To record the afferent volley after posterior tibial nerve stimulation,
an electrode should be placed on the -
correct answer ✅Popliteal Fossa
List 3 stimulation scalp positions for MEPs -
correct answer ✅C3 and C4, C1 and C2, CF3 and CF4
Answers (Grade A+)
Which artery supplies blood to the hands and face area of the
somatosensory cortex? -
correct answer ✅Middle Cerebral Artery
While reviewing the history and physical while seeing your patient
in pre-op, you see mention of a grade 1 spondylolithesis. This
means that the patient has what anatomical abnormality? -
correct answer ✅A vertebral body that is displaced anteriorly over
the vertebral body inferior to it
Which blood vessel supply descending motor fibers? -
correct answer ✅Anterior Spinal Artery
Motor evoked potentials are also known as -
correct answer ✅Anodal Stimulation
Trapezius is innervated by what nerve root levels? -
correct answer ✅C2-C4
The ulnar nerve originates from the nerve roots at -
correct answer ✅C7-T1
,IONM Final Exam Questions &
Answers (Grade A+)
The section of the brain stem that is continuous with the spinal
cord and includes the decussating of the pyramids is the -
correct answer ✅Medulla Oblongata
The median nerve originates from nerve roots -
correct answer ✅C5-T1
The spinal cord pathways monitored by SSEPs are -
correct answer ✅The Posterior Columns
What are the warning criteria for TcMEPs? -
correct answer ✅Complete persistent attenuation of the
compound muscle action potential
Motoneuron disease usually is associated with __________ MEP
responses? -
correct answer ✅Absent
Another stimulation method to acquire MEP waveforms is -
correct answer ✅Magnetic Stimulation
,IONM Final Exam Questions &
Answers (Grade A+)
T/F - Neurogenic Motor Evoked Potentials (NMEP) are now thought
to represent primarily an anterior lateral pathway motor response.
-
correct answer ✅False
Which of the following diseases would most inhibit your ability to
monitor posterior tibial nerve SSEPs? -
correct answer ✅Diabetic Neuropathy
Which of D or I waves is more affected by anesthesia? -
correct answer ✅I Waves
TcMEPs monitor which pathway? -
correct answer ✅Corticospinal Tract
For median nerve stimulation, the cathode is placed -
correct answer ✅Between the tendons of the Palmaris longs and
flexor carpi
Intraoperative baseline recordings in somatosensory evoked
potentials are best acquired -
correct answer ✅In the positioned induced patient
, IONM Final Exam Questions &
Answers (Grade A+)
Select NNS TceMEP filter settings -
correct answer ✅HFF (1-3 kHz) LFF (10-30 Hz)
With the referential recording, maximal amplitude cortical evoked
potentials following stimulation of the left posterior tibial nerve
usually would be found between -
correct answer ✅Fz and Cz
T/F - In 20% of patients with spinal cord tumors or Postradiation
Myelopathy D-wave recording is not present even if the muscle
MEP was present -
correct answer ✅True
To record the afferent volley after posterior tibial nerve stimulation,
an electrode should be placed on the -
correct answer ✅Popliteal Fossa
List 3 stimulation scalp positions for MEPs -
correct answer ✅C3 and C4, C1 and C2, CF3 and CF4
