Medial plantar nerve conduction studies in healthy controls and diabetics
2007 (English)In: Clinical Neurophysiology, ISSN 1388-2457, E-ISSN 1872-8952, Vol. 118, no 5, 1155-1161 p.Article in journal (Refereed) Published
Objective: To collect a reference material of the medial plantar nerve action potential, to test intra/interobserver reliability in healthy controls and to apply the test to a group of patients with diabetes mellitus. Methods: 98 healthy controls and 50 patients with diabetes mellitus were included. The medial plantar nerve was stimulated orthodromically and recorded with a surface electrode. In the patient group, NCS of motor and sensory nerves and quantitative sensory testing were also performed. Results: Responses of the medial plantar nerve were obtained from all controls except from one aged 72. Amplitude decreased with age (r = -0.68, p < 0.0001). Intra/interobserver reliability was acceptable. 52% of the patients had abnormal overall NCS classification. Forty-eight percent had delayed tibial F-response latency. The medial plantar NCS were abnormal in 59% of the cases (47% abnormal NAP amplitude and 39% reduced CV), 59% of those with abnormal NCS had symptoms of sensory polyneuropathy. Only 24% had abnormal sural amplitude. Cold perception threshold was abnormal in more patients (30%) than warmth perception threshold (14%). Conclusions: Responses were easily obtained in controls under 70 years. In diabetics the amplitudes of the medial plantar nerve were abnormal more often than in the sural nerve. Significance: The medial plantar nerve response is reliable in patients under 70 years, and intra/interobserver reliability is acceptable.
Place, publisher, year, edition, pages
2007. Vol. 118, no 5, 1155-1161 p.
medial plantar nerve response, intra/interobserver variability, diabetic polyneuropathy, nerve conduction studies, quantitative sensory testing
Medical and Health Sciences
IdentifiersURN: urn:nbn:se:uu:diva-144701DOI: 10.1016/j.clinph.2007.01.008ISI: 000246437300021PubMedID: 17321794OAI: oai:DiVA.org:uu-144701DiVA: diva2:394343