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Key Facts: R.NCS.T Exam
250 questions
The R.NCS.T. exam has a maximum of 250 multiple-choice questions
AAET National Registry Examination Candidate Handbook (PTC)
4 hours
Total testing time for the R.NCS.T. examination
AAET National Registry Examination Candidate Handbook (PTC)
$650
Written examination fee paid through the Professional Testing Corporation
AAET - Written Examinations
7 content areas
The exam content outline is divided into seven weighted areas
AAET National Registry Examination Candidate Handbook (PTC)
35%
Peripheral nerves, case studies and electrode placement is the largest content area
AAET National Registry Examination Candidate Handbook (PTC)
20%
Physiology and anatomy is the second-largest content area
AAET National Registry Examination Candidate Handbook (PTC)
5 years
Certification period before recertification by CE hours or re-examination
AAET - Recertification FAQ
30 CE hours
Continuing education hours required to recertify over the five-year cycle
AAET - Recertification FAQ
The R.NCS.T. is the Registered Nerve Conduction Studies Technologist credential, earned by passing the AAET National Registry Examination for Nerve Conduction Studies. The exam is computer-based, with a maximum of 250 multiple-choice questions and a four-hour testing time, and the fee is $650 through the Professional Testing Corporation. Content is weighted across seven areas, the largest being peripheral nerves, case studies and electrode placement (35%), followed by physiology and anatomy (20%) and neuromuscular junction transmission and repetitive nerve stimulation (13%). Certification lasts five years and is renewed by 30 hours of continuing education or by re-examination. This 100-question bank gives original practice modelled on those content areas, weighted toward NCS technique, instrumentation, anatomy and pathology correlation.
Sample R.NCS.T Practice Questions
Try these sample questions to test your R.NCS.T exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.
1At rest, a typical peripheral nerve cell membrane maintains a resting membrane potential of approximately:
2During the depolarization phase of a nerve action potential, the principal ion movement across the membrane is:
3The all-or-none principle of nerve conduction means that:
4Saltatory conduction in myelinated nerve fibers refers to the action potential:
5Which fiber type generally has the FASTEST conduction velocity?
6The neuromuscular junction transmits signals from nerve to muscle primarily using which neurotransmitter?
7The median nerve is formed from which spinal nerve roots?
8Which muscle is most commonly used as the recording site for a routine median MOTOR nerve conduction study?
9The ulnar nerve is most vulnerable to compression at which anatomic site?
10In a motor nerve conduction study, the compound muscle action potential (CMAP) amplitude is most directly proportional to:
About the R.NCS.T Exam
The Registered Nerve Conduction Studies Technologist (R.NCS.T.) credential certifies that a technologist has the knowledge and skills to perform nerve conduction studies competently as part of an electrodiagnostic team. The written certification examination is the AAET National Registry Examination for Nerve Conduction Studies: a computer-based test of up to 250 multiple-choice questions completed in four hours and administered by the Professional Testing Corporation. Its seven content areas cover physiology and anatomy (20%); basic electronics, instrumentation and stimulation (5%); nerve conduction velocity concepts and Wallerian degeneration (10%); late responses and the blink reflex (5%); neuromuscular junction transmission and repetitive nerve stimulation (13%); peripheral nerves, case studies and electrode placement (35%); and technical considerations, anomalies and safety (12%). The credential is maintained on a five-year cycle by continuing education or by retaking the examination.
Assessment
One-part written-only, computer-based examination composed of a maximum of 250 multiple-choice, objective questions across seven content areas, from physiology and anatomy to technical considerations and safety.
Time Limit
Total testing time of four (4) hours.
Passing Score
Criterion-referenced passing standard set by the AAET; scores are reported by PTC. There is no fixed published raw percentage cutoff.
Exam Fee
The written examination fee is $650.00, paid through the Professional Testing Corporation (PTC); location or facility fees may apply. (American Association of Electrodiagnostic Technologists (AAET), delivered by the Professional Testing Corporation (PTC); credential recognized through ABRET.)
R.NCS.T Exam Content Outline
Physiology and Anatomy
Resting and action potentials, cell membrane physiology, the all-or-none response, myelin and saltatory conduction, motor and sensory nerve anatomy, peripheral nerve structure and the neuromuscular junction. Practice here builds the physiological foundation for interpreting NCS waveforms.
Basic Electronics, Instrumentation and Stimulation
Amplifiers, differential amplification and common-mode rejection, low- and high-frequency filters, gain and sensitivity, sweep speed, stimulators, electrode types and signal averaging. Practice here covers how instrument settings shape the recorded response.
Nerve Conduction Velocity Concepts and Wallerian Degeneration
Onset and peak latency, amplitude, conduction velocity calculation, distance measurement, the effect of temperature, and the distinction between axonal loss and demyelination including Wallerian degeneration and conduction block. Practice here includes velocity and amplitude calculation items.
Late Responses and Blink Reflex
F-wave and H-reflex physiology, recording technique and interpretation, and the blink reflex (R1 and R2 components). Practice here focuses on what late responses test and how their pathways differ from standard motor and sensory studies.
Neuromuscular Junction Transmission and Repetitive Nerve Stimulation
Neuromuscular transmission, the safety factor, and repetitive nerve stimulation technique. Practice here covers decrement in postsynaptic disorders such as myasthenia gravis and increment with high-rate stimulation or exercise in presynaptic disorders such as Lambert-Eaton myasthenic syndrome.
Peripheral Nerves, Case Studies and Electrode Placement
Specific motor and sensory studies (median, ulnar, radial, peroneal, tibial, sural and others), recording and stimulating electrode placement, normal values and case correlation. Practice here is the largest section and emphasizes carpal tunnel, ulnar neuropathy, polyneuropathy and radiculopathy patterns.
Technical Considerations, Anomalies and Safety
Stimulus artifact, 60-Hz interference, electrode and ground problems, anomalous innervation such as the Martin-Gruber anastomosis, electrical safety with lines and pacemakers, and standard precautions for infection control. Practice here covers troubleshooting and patient safety.
How to Pass the R.NCS.T Exam
What You Need to Know
- Passing score: Criterion-referenced passing standard set by the AAET; scores are reported by PTC. There is no fixed published raw percentage cutoff.
- Assessment: One-part written-only, computer-based examination composed of a maximum of 250 multiple-choice, objective questions across seven content areas, from physiology and anatomy to technical considerations and safety.
- Time limit: Total testing time of four (4) hours.
- Exam fee: The written examination fee is $650.00, paid through the Professional Testing Corporation (PTC); location or facility fees may apply.
Keys to Passing
- Complete 500+ practice questions
- Score 80%+ consistently before scheduling
- Focus on highest-weighted sections
- Use our AI tutor for tough concepts
R.NCS.T Study Tips from Top Performers
Frequently Asked Questions
How many questions are on the R.NCS.T. exam and how long is it?
The AAET National Registry Examination for Nerve Conduction Studies is a computer-based test composed of a maximum of 250 multiple-choice questions with a total testing time of four hours.
Who administers the R.NCS.T. examination?
The credential is offered by the American Association of Electrodiagnostic Technologists (AAET), and the examination application, payment and testing are handled by the Professional Testing Corporation (PTC). ABRET also recognizes and lists the R.NCS.T. credential.
How much does the R.NCS.T. exam cost?
The written examination fee is $650.00, paid through PTC. Some test centers may add location or facility fees, so candidates should verify with PTC when scheduling.
What are the eligibility requirements?
Under the requirements effective January 1, 2019, candidates qualify with one year of NCS experience plus 100 patient encounters or 30 AAET CEUs (Pathway 1), or by graduating from a CAAHEP-accredited neurodiagnostic program plus the same encounter or CEU requirement (Pathway 2).
What content areas are weighted most heavily?
Peripheral nerves, case studies and electrode placement is the largest area at 35%, followed by physiology and anatomy at 20% and neuromuscular junction transmission with repetitive nerve stimulation at 13%.
How is the R.NCS.T. credential renewed?
Certification lasts five years. Technologists renew either by completing at least 30 hours of continuing education directly related to NCS or neuromuscular disease, or by retaking and passing the written examination.