title: Nerve conduction studies in the upper limb in the malwa region-normative data.
abstract: OBJECTIVE
  To establish the normal electrophysiological data for the median and the ulnar nerves in normal healthy adults in the Malwa region of Punjab, India.
  
  
  METHODS
  Nerve conduction studies were performed prospectively in the upper limbs of 100 carefully screened, healthy individuals of either sex, who were between the ages of 20 and 60 years, by using a standardized technique.
  
  
  RESULTS
  Motor studies: The median distal latency (DL) in men was 3.4 (0.2) ms, the amplitude (CMAPA) was 10.80 (2.8) mV, the conduction velocity (MNCV) was 55.6 (2.5) m/s and the F-wave (min latency) was 27.57±2.54(21.5-34.2). In the ulnar nerve , the motor DL was 2.34 (0.25) ms, the amplitude (CMAPA) was 9.8(2.6) mV, MNCV was 63.4 (3.0) m/s and the F-Wave(min latency) was 26.29±2.12(21.6-34.7). In the sensory studies, the median nerve DL was 2.0(0.35) ms, SNCV was 53.4±3.0 m/s and the amplitude (SNAPA)was 59.3 (16.4) μV for men and it was 68.7(28.4) μV for women. For the ulnar nerve in men, the DL was 1.85(0.25)ms, SNCV was 55.5 (4.1) m/s and the amplitude(SNAPA) was 55.5 (18.4) μV for men and it was 64.9 (16.8) μV for women. Only the gender showed a statistically significant effect on the sensory nerve action potential for the median (p < 0.04) and the ulnar nerves (p < 0.041).
  
  
  CONCLUSIONS
  The normative conduction parameters of the commonly tested nerves in the upper limb were established in our EMG lab. The mean motor nerve conduction parameters for the median and the ulnar nerves correlated favourably with the existing literature data. However, for the sensory nerves, a higher value for the nerve action potential amplitude was demonstrated in this study.
authors.affiliation: Assistant Professor, Department of Physiology.
authors.forename: Ruchika
authors.initials: R
authors.lastname: Garg
authors.forename: Nitin
authors.initials: N
authors.lastname: Bansal
authors.forename: Harpreet
authors.initials: H
authors.lastname: Kaur
authors.forename: Khushdeep Singh
authors.initials: KS
authors.lastname: Arora
keywords: Compound Muscle Action Potential Amplitude (CMAPA); Nerve Conduction Study (NCS); Sensory Nerve Action Potential (SNAPA) Median Nerve; Ulnar Nerve
references.citation: Am J Phys Med Rehabil. 1992 Oct;71(5):263-71
references.pmid: 1388972
references.citation: Muscle Nerve. 1992 Oct;15(10):1095-104
references.pmid: 1406766
references.citation: Arch Phys Med Rehabil. 1993 Nov;74(11):1134-8
references.pmid: 8239949
references.citation: Neurology. 1964 Sep;14:825-35
references.pmid: 14215597
references.citation: Electromyogr Clin Neurophysiol. 2000 Jan-Feb;40(1):45-8
references.pmid: 10782357
references.citation: Arch Phys Med Rehabil. 1971 Aug;52(8):362-5
references.pmid: 5565886
references.citation: Arch Phys Med Rehabil. 1994 Mar;75(3):265-9
references.pmid: 8129576
references.citation: J Neurol Neurosurg Psychiatry. 1964 Oct;27:381-5
references.pmid: 14213466
references.citation: Arch Phys Med Rehabil. 1983 May;64(5):227-32
references.pmid: 6847360
references.citation: Ann Neurol. 1984 Oct;16(4):415-29
references.pmid: 6093680
references.citation: Indian J Physiol Pharmacol. 2011 Jul-Sep;55(3):241-5
references.pmid: 22471231
references.citation: Am J Phys Med Rehabil. 1999 Nov-Dec;78(6 Suppl):S32-7
references.pmid: 10573095
references.citation: Arch Phys Med Rehabil. 1994 Mar;75(3):259-64
references.pmid: 8129575
references.citation: J Neurol Neurosurg Psychiatry. 1980 Oct;43(10):925-8
references.pmid: 7441272