## Abstract

Introduction: Nerve conduction study is a part of electro diagnostic procedures that have been proven useful in the evaluation of the function of the peripheral nervous system, including the ulnar nerve. There are physiological and non- physiological aspects to the ulnar nerve conduction velocity. The use of ulnar conduction velocity measurement as a diagnostic procedure requires a knowledge of the range of values encountered in healthy individuals. Aim: to obtain the normal value of ulnar motor nerve conduction velocity (NCV) at the elbow and the amplitude, and the difference of conduction velocity between the elbow and forearm segments, and to know the difference value of NCV and the amplitude between various groups of variables. Methods: A cross-sectional study (survey method) was performed to normal adult population, aged 21-60 years old, residing in the neighborhood of RSCM and researcher, who fulfilled the inclusion criteria. Ulnar motor nerve conduction study was performed on both arms, assessed for latency, amplitude, and NCV in segment of the motor ulnar forearm and elbow.

Results: Among 160 samples, the mean of below elbow and above elbow amplitudes were, respectively, 6,79±1,44 and 6,58±1,43 mV, with lower limit of the normal value respectively, were 3,9 and 3,7 mV. The median value of ulnar NCV across the elbow, generally, was 62,5 (43,5-83,3) with lower limit of the normal value 50,0 m/s. Differentiated by gender, for male and female, respectively, were 55,6 (43,5-83,3) and 62,5 (50,0-83,3), with lower limit of normal value 45,1 m/s and 52,6 m/s. The difference of conduction velocity between 2 segments, for male and female, respectively, 2,5 (-26,9–23,3) and 0,0 (-19,3–14,7), with upper limit of normal value 16,3 and 12,8 m/s, respectively. The difference of ulnar motor NCV across the elbow between male and female groups was statistically significant (p=0,000). Contrary to the other group of variables. Similarly, the amplitude value of the age group, gender, BMI and hand dominance. Conclusion: Lower limit of the nomal value of below and above elbow amplitude were 3,9 and 3,7 mV, repectively. Lower limit of normal value of ulnar motor NCV across the elbow for male was 45,1 m.s, and for female was 52,6 m/s.

Results: Among 160 samples, the mean of below elbow and above elbow amplitudes were, respectively, 6,79±1,44 and 6,58±1,43 mV, with lower limit of the normal value respectively, were 3,9 and 3,7 mV. The median value of ulnar NCV across the elbow, generally, was 62,5 (43,5-83,3) with lower limit of the normal value 50,0 m/s. Differentiated by gender, for male and female, respectively, were 55,6 (43,5-83,3) and 62,5 (50,0-83,3), with lower limit of normal value 45,1 m/s and 52,6 m/s. The difference of conduction velocity between 2 segments, for male and female, respectively, 2,5 (-26,9–23,3) and 0,0 (-19,3–14,7), with upper limit of normal value 16,3 and 12,8 m/s, respectively. The difference of ulnar motor NCV across the elbow between male and female groups was statistically significant (p=0,000). Contrary to the other group of variables. Similarly, the amplitude value of the age group, gender, BMI and hand dominance. Conclusion: Lower limit of the nomal value of below and above elbow amplitude were 3,9 and 3,7 mV, repectively. Lower limit of normal value of ulnar motor NCV across the elbow for male was 45,1 m.s, and for female was 52,6 m/s.

Original language | Indonesian |
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Journal | Neurona |

Publication status | Published - 2011 |