Electrodiagnostic reference data for motor nerve conduction studies in Saudi Arabia

↵* Ulnar motor conduction velocity across the elbow was 69.5±8.0 (52 – 91) m/s, ^† Two participants with Martin-Gruber anastomosis were excluded, ^‡ Fibular motor conduction velocity across fibular head was 58.7±9.1 (38 – 90) m/s, No absent responses. DML - distal motor latency, D2 - index finger, D4 - ring finger, D5 - little finger, FH - fibular head

↵* Regression coefficients obtained from the quantile regression model: log (predicted value)= β₀ + β₁ ×(age), ^† LLN represents the lower limit of the 95% confidence interval at minimum values in the sample, ^‡ ULN represents the upper limit of the 95% confidence interval at maximum values in the sample, ^§ Regression model for ulnar CMAP amplitude was estimated at the 5^th percentile, as it was not significant at the lower percentiles, ^∫ Drop in tibial amplitude with stimulation at popliteal fossa should be interpreted cautiously because supramaximal stimulation may not have been achieved due to pain and technical factors, Data are combined for NCS parameters with no age effect. Age was not significantly associated with tibial CMAP amplitude. Therefore, the reference limit was calculated for the entire group, DML - distal motor latency, FH - fibular head, CMAP - compound muscle action potential, NCS - nerve conduction study