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SPECIAL ARTICLE
Ann Clin Neurophysiol. 2018; 20(2): 71-78.
Published online July 31, 2018.
doi: https://doi.org/10.14253/acn.2018.20.2.71
Nerve conduction studies: basic principal and clinical usefulness
Suk-Won Ahn1, Byung-Nam Yoon2, Jee-Eun Kim3, Jin Myoung Seok4, Kwang-Kuk Kim5, Young Min Lim5, Ki-Han Kwon6, Kee Duk Park7, Bum Chun Suh8, and on behalf of the Korean Society of Clinical Neurophysiology Education Committee
1Department of Neurology, Chung-Ang University Hospital, Chung-Ang University College of Medicine, Seoul, Korea
2Department of Neurology, Seoul Paik Hospital, Inje University College of Medicine, Seoul, Korea
3Department of Neurology, Seoul Medical Center, Seoul, Korea
4Department of Neurology, Soonchunhyang University Hospital Cheonan, Soonchunhyang University College of Medicine, Cheonan, Korea
5Department of Neurology, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
6Department of Neurology, Hallym University Dongtan Sacred Heart Hospital, Hallym University College of Medicine, Hwaseong, Korea
7Department of Neurology, Mokdong Hospital, Ewha Womans University School of Medicine, Seoul, Korea
8Department of Neurology, Kangbuk Samsung Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
Corresponding Author: on behalf of the Korean Society of Clinical Neurophysiology Education Committee  ,Tel: +82-2-2291-2290, Fax: +82-2-737-6531, Email: kscn@kscn.or.kr
Received June 27, 2018   Revised: July 3, 2018    Accepted July 4, 2018
ABSTRACT
Nerve conduction study (NCS) is an electrophysiological tool to assess the overall function of cranial and peripheral nervous system, therefore NCS has been diagnostically helpful in the identification and characterization of disorders involving nerve roots, peripheral nerves, muscle and neuromuscular junction, and are frequently accompanied by a needle Electromyography. Furthermore, NCS could provide valuable quantitative and qualitative results into neuromuscular function. Usually, motor, sensory, or mixed nerve studies can be performed with using NCS, stimulating the nerves with the recording electrodes placed over a distal muscle, a cutaneous sensory nerve, or the entire mixed nerve, respectively. And these findings of motor, sensory, and mixed nerve studies often show different and distinct patterns of specific abnormalities indicating the neuromuscular disorders. The purpose of this special article is to review the neurophysiologic usefulness of NCS, to outline the technical factors associated with the performance of NCS, and to demonstrate characteristic NCS changes in the setting of various neuromuscular conditions.
Key words: Nerve conduction study; NCS; Peripheral nerve; Electrophysiology; Neuromuscular disorders
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