• Title/Summary/Keyword: Nerve conduction study

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Study on Normal Nerve Conduction Parameters (신경전도검사의 정상치에 관한 연구)

  • Han, Song-Yee;Kim, Dae-Seong;Park, Kyu-Hyun
    • Annals of Clinical Neurophysiology
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    • v.1 no.2
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    • pp.118-125
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    • 1999
  • Background and Aims : Nerve conduction study is invaluable in clinical neurology, especially for assessing peripheral neuropathies. Abnormal nerve conduction studies may result not only from peripheral nerve dysfunction itself, but also from other various mechanical, technical, and physiological factors such as age, sex, height and temperature. So we conducted this study to establish the our own normal values. Methods : In this study, from March. 1997 to July. 1998, 40 Korean adults among person came to Health Promotion Center over the age of 20 without any suspicion of neurological deficits were analysed to determine the effect of compound effects of several physiological factors. Results : The nerve conduction velocities of the upper extremity and proximal segments were faster than those of the lower extremity and distal segments. Physiological factors such as age, height and temperature affect the results of nerve conduction studies in multiple regression analysis. The sex difference is recognized over peroneal motor nerve. There are no sex differences in amplitude transformed into normal distribution. The significant physiological factor affecting the amplitude of nerve conduction is age, whereas height and temperature play no role. Conclusions : In multiple regression analysis, height is widespread variable for the nerve conduction velocities and temperature is important variable for lower extremities. The parametric statistical analysis cannot be applied to the amplitude of the compound muscle or nerve action potentials because of marked left shift in distribution. Sqareroot transformation of the CMAP and CNAP may be useful in normalizing the distribution. The most significant physiological factor affection the amplitude is age. Sex differences are not seen in nerve conduction study.

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Medial Plantar Sensory Nerve Conduction Studies in Diabetics: Comparision of Three Different Methods (당뇨병 환자에서의 안쪽 발바닥 감각신경의 신경전도검사: 세 가지 다른 방법의 비교)

  • Kwon, Hyuk-Hwan;Lee, Dong-Kuck;Seok, Jung-Im;Han, Woo-Ho
    • Annals of Clinical Neurophysiology
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    • v.12 no.1
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    • pp.16-20
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    • 2010
  • Background: The medial plantar nerve (MPN) is a distal branch of the posterior tibial nerve, and various methods of nerve conduction study for MPN have been introduced so far. Hemmi et al described a new method (Hemmi's method) for recording medial plantar sensory nerve action potentials (SNAPs), which is considered as a simple and reliable method for measuring medial plantar SNAPs. This study was aimed to establish the normal values for the MPN conduction study among Koreans and to compare the sensitivities of three different methods for MPN conduction study (Hemmi, Oh, and Saeed's method) in detecting evidence of peripheral neuropathy among diabetic patients. Methods: In 27 healthy subjects, MPN conduction study using Hemmi's method was performed and normal values were calculated. In 54 diabetic patients who showed normal routine nerve conduction studies, three different methods for MPN conduction study were performed and diagnostic sensitivity of each method were compared. Results: In normal subjects, the mean medial plantar SNAP amplitude and conduction velocities measured by Hemmi's method were $4.3{\pm}1.0$ uV and $38.3{\pm}6.8$ m/s respectively. Among 54 patients with diabetes who showed normal routine nerve conduction studies, medial plantar SNAP was not obtainable in 28, 31, and 6 patients by Hemmi, Oh and Saeed's method respectively. Conclusions: In terms of the diagnostic sensitivity for detecting diabetic neuropathy, there had been no significant statistical difference between three different methods. Our study suggested that MPN conduction study using Hemmi's method is simple and useful screening test for early diabetic neuropathy, and is comparable with Oh's method.

The Importance of Age as a Factor of Carpal Tunnel Syndrome management (수근관 증후군 치료결정의 한 요인으로 연령의 중요성)

  • Kim, Ja-Young;Park, Hae-Yoon;Kang, Sung-Soo
    • Annals of Clinical Neurophysiology
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    • v.3 no.1
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    • pp.15-20
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    • 2001
  • Background : Carpal tunnel syndrome(CTS) is the most common entrapment neuropathy that refers to a group of signs and symptoms resulting from compression of the median nerve at the wrist. The course of CTS in older patients is different from the younger patients. This difference may be the result of different underlying mechanisms. The different nerve conduction studies of CTS may signify different approaches in management. This study was done to assess the differences in nerve conduction study of CTS in younger and older patients. Methods : This study involved 224 patients who visited Gachon Medical School, Gil Medical Center and was diagnosed by nerve conduction study from October 1997 to October 1999. We compared the results of nerve conduction study to age, especially in between those under 60 years and those 60 years or over CTS patients. Nerve conduction study consists of motor studies of both median nerves(terminal latency, compound action potential) and sensory studies(nerve conduction velocity, nerve action potential). And we also evaluated the variables between younger and older patients group. Those variables include sex, symptom period, laterality, abnormal physical findings and radiculopathy. Results : We found that a significant increase of terminal latency(p<0.1), but a decrease in compound motor action potential(p<0.05) in older patient's group. There was no significant differences in sensory nerve conduction velocity and action potential between those under 60 years and those 60 years or even patients. And also there was no significant difference in sex, symptom period, laterality, abnormal physical findings, radiculopathy between older and younger patients. Conclusions : This study showed a significant increase in the terminal latency and a decrease in compound action potential in older patients. The different nerve conduction studies of CTS by age effect may need different approaches in management.

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Effects of Caffeine on Nerve Conduction Velocity (카페인이 신경전도속도에 미치는 영향)

  • Kang, Yun-Jung
    • Journal of Convergence for Information Technology
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    • v.10 no.3
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    • pp.195-199
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    • 2020
  • This study examined the effect of the nervous-system-stimulating caffeine on the nerve conduction velocity. The purpose of this study is to investigate the effect of caffeine that stimulates the nervous system on nerve conduction test. Although both measurement intervals did not show statistically significant differences when comparing the pre- and post-NCV values within the control and individual experimental groups, it was found that the nerve conductivity in the Axilla-Above Elbow section increased significantly after caffeine intake for the experimental group. Caffeine intake, which has increased the nerve conduction velocity (NCV), was determined to play roles in improving motor skills, muscle strength and nerve performance by temporarily increasing the nerve conduction velocity. Through this study, we learned that caffeine has an influence on the peripheral nervous system as it helps to improve the nerve conduction velocity. upon an appropriate amount of caffeine intake. We hope that these results will help develop treatment and diagnostic methods for patients with nerve dysfunction and myofunctional disorders.

Clinical Application of Electromyography and Nerve Conduction Study (근전도와 신경전도 검사의 임상적 응용)

  • Kim Ho-Bong;Park Young-Han;Bae Sung-Soo
    • The Journal of Korean Physical Therapy
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    • v.10 no.1
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    • pp.199-212
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    • 1998
  • The purpose of this article is to summary about the application of electromyography and nerve conduction study. Electrodiagnostic studies, which include nerve conduction studies, electromyography, repetitive nerve stimulation, single fiber EMG, late response tests and evoked potential tests are a critical component of the neuromuscular evaluation.

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Clinical Application of Electromyography and Nerve Conduction Study (근전도와 신경전도 검사의 임상적 응용)

  • Kim, Ho-Bong;Bae, Sung-Soo
    • Journal of Korean Physical Therapy Science
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    • v.5 no.2
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    • pp.603-616
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    • 1998
  • The purpose of this article is to summary about the application of electromyography and nerve conduction study. Electrodiagnostic studies, which include nerve conduction studies, electromyography, repetitive nerve stimulation, single fiber EMG, late response tests and evoked potential tests are a critical component of the neuromuscular evaluation.

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Segmental Sensory Nerve Conduction Study in Vibration Exposed Subjects

  • Kim Mi-Jung;Yoon Cheol-In;Choi Hyun-Ju
    • Biomedical Science Letters
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    • v.11 no.2
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    • pp.193-199
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    • 2005
  • The present study was performed to assess peripheral neural involvement by exposure to hand-arm vibration. Segmental sensory nerve conduction in the median and ulnar nerves were measured in shipyard workers exposed to vibration. The subjects were 47 male adults exposed to hand-arm vibration and 7 healthy male controls. The subjects underwent an extensive bilateral neurophysiological examination. Sensory compound nerve action potential (SNAP) of the median and ulnar nerves in palm-finger and wrist-palm segments were measured by antidromic method. And SNAP of the median and ulnar nerves in wrist-proximal finger and wrist-distal finger segments were measured by orthodromic method. Result of sensory nerve conduction study was abnormal in 31 patients $(66\%)$ and normal in 16 patients $(34\%)$ of subjects. The pathological pattern in the hand-arm vibration exposed group was 13 patients $(28\%)$ of carpal tunnel syndrome, 18 patients $(38\%)$ of distal sensory neuropathy, 7 patients $(15\%)$ of multifocal and 1 patient $(2\%)$ of Guyon syndrome. The present study indicates that vibration-induced nerve impairments exist both in the finger-palm and palm-wrist segment of median and ulnar sensory nerves. The results suggest that segmental sensory nerve conduction study would be useful as objective indication of peripheral nerve impairment induced by the hand-arm vibration.

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Lateral Femoral Cutaneous Nerve: Variety in Conduction (Seror's Method) According to Body Mass Index and Age (가쪽넙다리피부신경전도검사의 체질량지수와 나이에 따른 다양성)

  • Kim, Hyun Young;Han, Yang Sook;Koh, Seong-Ho;Kim, Juhan;Kim, Seung Hyun
    • Annals of Clinical Neurophysiology
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    • v.8 no.2
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    • pp.152-157
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    • 2006
  • Background: Meralgia paresthesia (MP) is characterized by sensory impairment in the anterolateral aspect of the thigh and usually caused by a lateral femoral cutaneous nerve (LFCN) lesion. It is well known that several physiologic factors including age, obesity, and sex can affect nerve conduction. This study aimed to determine whether body mass index (BMI) and age can influence on the conduction velocity and action potential amplitude of the LFCN. Methods: Fifty six individuals without any previous neuromuscular disease participated in this study. LFCN was studied orthodromically, distally from the anterior superior iliac spine. The values, such as sensory nerve action potential (SNAP) amplitude and sensory nerve conduction velocity (NCV) were obtained. SNAP of the LFCN were formed on both sides in forty three individuals. Results: No difference of demographic factors was observed between two groups divided according to the presence of SNAP formation. BMI had a significant relationship with SNAP amplitude and NCV of the LFCN. Moreover, Multiple regression analyses of nerve conduction values showed the significant correlation of body mass index and age with nerve conduction velocity. Conclusions: We may suggest that nerve conduction of the LFCN can be affected by age and BMI. Further study to obtain normal nerve conduction data and compare these data with those of meralgia paresthetica patients should be continued.

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Ulnar nerve involvement in carpal tunnel syndrome (손목굴증후군에서 척골신경 침범)

  • Kang, Sa-Yoon;Ko, Keun Hyuk;Kim, Joong Goo
    • Journal of Medicine and Life Science
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    • v.15 no.2
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    • pp.101-104
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    • 2018
  • Carpal tunnel syndrome (CTS) is the most common entrapment neuropathy caused by focal compression of the median nerve in the carpal tunnel. However, many patients with CTS, who are diagnosed clinically and confirmed with electrophysiological studies, complain of the sensory symptoms extends to the ulnar nerve territory. The aim of this study was to evaluate whether a dysfunction in sensory fibers of the ulnar nerve was present or not in hands with CTS patients who had extramedian spread of sensory symptoms over the hand. We retrospectively analyzed the recording of the subjects who were diagnosed with CTS within a one-year-period of time. After exclusions, 136 hands recordings of 87 patient were included. We compared the results of median and ulnar nerve sensory conduction studies between normal hands and hands with CTS. We did not detect statistically significant difference on all parameters of ulnar nerve sensory conduction studies between the normal hands and the hands with CTS. The parameters of the obtained in median nerve sensory conduction studies were statistically different between the healthy control and CTS patients. The hands with CTS showed similar rate of ulnar sensory conduction abnormalities compared with the normal hands. In conclusion, our study showed that none of the parameters in ulnar sensory nerve conduction studies differ between two groups. Accordingly, our study revealed that ulnar nerve involvement does not contribute in CTS patients underlying the spread of paresthesia extends to the ulnar nerve territory.

Clinical Study of Bell's Palsy with DITI and Nerve Conduction Test(EN0G and EMG) (DITI 및 전기신경전도검사(EN0G 및 EMG)를 이용한 구안와사(Bell's palsy) 환자에 대한 임상적 고찰)

  • Kim, Jin-man;Hong, Chul-hee;Du, In-sun;Hwang, Chung-yeon;Kim, Nam-kwen;Park, Min-chul;Lee, Sang-kwan;Jung, Sang-su;Yoon, Jun-chul
    • The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
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    • v.16 no.2
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    • pp.189-211
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    • 2003
  • The clinical data and thermographic imaging were analyzed on the 38 cases of Bell's palsy who were treated admission in the Oriental Medicine Hospital of Wonkwang University from January 2002 to May 2003. 38 patients with Bell's palsy were within one week after the onset of the paralysis, and thermal type in the DITI were hypo or hyper generally. Nerve conduction test(ENOG and EMG) examined in two weeks after onset. We studied interaction effect between thermal type and paralysis grade on admission day. We studied each main effect ; paralysis grade on admission day - nerve conduction test, nerve conduction test - thermal type, thermal type - paralysis grade after 4 weeks, paralysis grade on admission day - paralysis grade after 4 weeks, sasang constitution - nerve conduction test. The following results were obtained that interaction effect between thermal type and paralysis grade on admission day showed no significance, each main effect ; paralysis grade on admission day - nerve conduction test, paralysis grade on admission day - paralysis grade after 4 weeks, showed significance, each main effect ; nerve conduction test - thermal type, thermal type - paralysis grade after 4 weeks, sasang constitution - nerve conduction test, showed no significance.

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