AMHSR

Median Nerve Conduction in Healthy Nigerians: Normative Data

Author(s): Owolabi LF, Adebisi SS, Danborno BS, Buraimoh AA

Background: Because of lack of local normative data, electrodiagnostic laboratories in Nigeria apply standard values generated in the USA and Europe to diagnose different median nerve abnormalities.

Aim: To develop normative values for motor and sensory median nerve conduction studies (NCSs) in Nigerian population. Subjects and Methods: In a cross‑sectional study design, a total of 200 healthy volunteers were selected after clinical evaluation to exclude systemic or neuromuscular disorders. NCS of the median nerves was conducted on all the healthy volunteers according to a standardized protocol. The data included in the final analysis were amplitude, latency, and nerve conduction velocity. Ethical approval was obtained for the study.

Results: The reference range for median nerve (motor) velocity, distal latency, and amplitude were 49.48–66.92, 1.95–4.52, and 4.3–11.3, respectively. The reference range for median nerve F‑wave latency was 44.8–70.5. The reference range for median nerve (sensory) velocity, distal latency, and amplitude were 44.8–70.5, 1.98–4.52, and 16.6–58.4, respectively. Conclusion: Reference values for the nerve conduction parameters of the median (motor and sensory) in the study population were similar to those obtained in the literature.


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