Objective: To derive a normative database for nerve conduction values of the lateral antebrachial cutaneous nerve (LACN) using a large and varied subject population. Design: Descriptive study. Setting: Private office or university-based clinic. Participants: Volunteers (n = 213), recruited through advertisements, who met inclusion criteria. Main Outcome Measures: Onset latency, peak latency, baseline-to-peak amplitude, peak-to-peak amplitude, area, rise time, duration, side-to-side differences, and the effects of age, race, sex, height, and body mass index (BMI) were investigated on 213 healthy volunteers between the ages of 19 and 79 years. Results: The mean ± SD onset latency was 1.7 ± 0.2ms. The 95th and 97th percentile values for onset latency were 2 and 2.1ms, respectively. Mean peak latency was 2.2 ± 0.2ms. Both the 95th and 97th percentile values for peak latency were 2.5ms. Mean onset to peak amplitude was 18 ± 10μV. The 5th and 3rd percentile values for onset to peak amplitude were 6 and 5μV, respectively. Mean peak-to-peak amplitude was 22 ± 15μV. The 5th and 3rd percentile values for peak-to-peak amplitude were 7 and 6μV, respectively. Mean area was 11 ± 7nV-s, mean rise time was 0.5 ± 0.1ms, and mean duration was 1.1 ± 0.2ms. Mean side-to-side difference was 0.1 ± 0.2ms for onset latency, 0.1 ± 0.2ms for peak latency, 1 ± 12μV for onset to peak amplitude, and 0 ± 17μV for peak-to-peak amplitude. Increasing age and BMI were associated with lower mean amplitudes, but did not affect the lower limits of normal. Conclusion: These normative values will be useful in electrodiagnostic study of the LACN. (C) 2000 by the American Congress of Rehabilitation Medicine and the American Academy of Physical Medicine and Rehabilitation.
- Nerve conduction
ASJC Scopus subject areas