ABEM (EDX) study guide
ABEM (EDX) · Work through your exam, one topic at a time.
This independent study page introduces the ABEM Certification Examination in Electrodiagnostic Medicine, a physician certification exam offered by ABEM. ABEM states that the ABEM Certification Exam is the only U.S. exam certifying physicians in EDX medicine. The credential is intended for physicians who practice or intend to practice electrodiagnostic medicine and who want to demonstrate specialized knowledge in the field. The ABEM (EDX) study guide has 5 sections and about 1,598 words.
01Clinical Neuromuscular Disease: Localization and Pattern Recognition
Every neuromuscular question becomes easier if you place the lesion before recalling a diagnosis. Upper motor neuron signs (spasticity, hyperreflexia, Babinski) point to brain or spinal cord; lower motor neuron signs (atrophy, fasciculations, areflexia) point to anterior horn, root, plexus, or peripheral nerve.
313 words, about 2 min02Nerve Conduction Studies: Technique, Interpretation, and Pitfalls
Nerve conduction studies answer two questions: is the nerve normally myelinated, and is the axon intact? Motor studies stimulate supramaximally and record the compound muscle action potential (CMAP) with the active electrode over the motor point and the reference distally.
333 words, about 2 min03Needle Electromyography: Spontaneous Activity, MUAPs, and Recruitment
Needle EMG samples individual motor units. Assess at rest for spontaneous activity, then with mild voluntary activation for MUAP morphology, then with maximal effort for recruitment and interference pattern.
308 words, about 2 min04Peripheral Nervous System Anatomy and Physiology
Know the nerve fiber types: A-alpha fibers are myelinated and fast, serving motor and proprioception; A-beta serves touch; A-delta serves pain and temperature; C fibers are unmyelinated and slow, serving pain and autonomic function. Myelin enables saltatory conduction; demyelination slows conduction, while axonal loss reduces amplitude.
329 words, about 2 min05Instrumentation, Quality, and Professional Practice in EDX Medicine
Reliable EDX data depend on technique as much as interpretation. Surface active and reference electrodes are used for NCS; concentric or monopolar needles are used for EMG.
315 words, about 2 min