Electromyography in Clinical Practice: A Case Study Approach by Bashar Katirji
By Bashar Katirji
The single case-based consultant to electromyography-back in an absolutely revised and up to date new version! This sensible source examines find out how to method, diagnose, and deal with the main in general encoun-tered problems within the EMG laboratory. in line with real instances, it correlates sufferer background, actual examination, EMG findings, correct anatomy, remedy, and follow-up to aid readers sharpen their scientific problem-solving talents. New instances were additional, and each case comprises the newest advances in wisdom and strategy.
- Features learn questions, solutions, and medical discussions of the way specialists deal with instances to aid readers paintings throughout the difficulties provided.
- Summarizes the result of nerve conduction stories and EMG facts with standardized tables.
- Includes greater than 2 hundred appropriate imaging reviews and anatomic figures.
- Makes details effortless to discover with a uniform bankruptcy association.
- Offers a constant method of electromyography in line with Dr. Katirji's vast wisdom and scientific experience.
- 7 new case experiences, together with Hereditary Neuropathy with legal responsibility to strain Palsy, Ischemic Monomelic Neuropathy, and Myotonic Dystrophy.
- Three new chapters on Nerve Conduction stories, Needle EMG exam, and really good tactics.
- Many new and revised figures that make clear advanced information.
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Extra resources for Electromyography in Clinical Practice: A Case Study Approach
Shapiro BE, Katirji B, Preston DC. Clinical electromyography. In: Katirji B, Kaminski HJ, Preston DC, Ruff RL, Shapiro EB, eds. Neuromuscular disorders in clinical practice. Boston, MA: Butterworth-Heinemann, 2002. St lberg E, Antoni L. Electrophysiological cross section of the motor unit. J Neurol Neurosurg Psychiatry 1980;43:469–474. Wilbourn AJ. Nerve conduction studies. Types, components, abnormalities and value in localization. Neurol Clin 2002;20: 305–338. 3 Specialized Electrodiagnostic Studies LATE RESPONSES Late responses are obtained using special techniques that are not possible with conventional nerve conduction studies.
Fibrillation potentials are also commonly encountered in necrotizing myopathies, such as the inflammatory myopathies, critical illness myopathies and muscular dystrophies. This is likely due to segmental necrosis of muscle fibers, leading to effective denervation of the distant segments as they become physically separated from the neuromuscular junction. Also, damage to the terminal intramuscular motor axons, presumably by the inflammatory process, may also result in muscle fiber denervation. In disorders of the neuromuscular junction such as myasthenia gravis or botulism, fibrillation potentials are rare.
Adapted from Oh S. Clinical electromyography, neuromuscular transmission studies. ) CMAP Normal MG ELS 46 Introduction to Clinical Electromyography A Figure 3–8. Rapid repetitive stimulation at 50 Hz of the median nerve at the wrist while recoding the abductor pollicis brevis. (A) Normal. (B) Patient with LambertEaton myasthenic syndrome showing significant increment of the CMAP. B Postexercise Baseline Ulnar nerve 2 mV 5 ms Figure 3–9. Pre- and postexercise CMAPs of the ulnar nerve following stimulation at the wrist while recoding the abductor digiti minimi in a patient with Lambert-Eaton myasthenic syndrome.