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Normal values of median nerve cross‐sectional area obtained by ultrasound along its course in the arm with electrophysiological correlations, in 100 Asian subjects
Author(s) -
Bathala Lokesh,
Kumar Pavan,
Kumar Krishna,
Shaik Ahammad Basha,
Visser Leo H.
Publication year - 2014
Publication title -
muscle and nerve
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.025
H-Index - 145
eISSN - 1097-4598
pISSN - 0148-639X
DOI - 10.1002/mus.23912
Subject(s) - median nerve , electrophysiology , medicine , ultrasound , cross sectional study , anatomy , electrodiagnosis , pathology , radiology
: The objective of this study is to obtain normative cross‐sectional area (CSA) values for median nerve by ultrasound at predetermined sites and correlate them with electrophysiological variables in healthy Asian subjects. Methods : The median nerve was examined ultrasonographically in 100 healthy volunteers, mean age 39 years (range, 18–75 years). CSA of the median nerve was measured at wrist, mid‐forearm, mid‐arm, and axilla. All subjects underwent simultaneous standardized nerve conduction studies. Results : The mean median nerve CSAs ± SD at the distal wrist crease was 7.2 ± 1 mm 2 ; mid‐forearm 4.8 ± 0.9 mm 2 ; mid‐arm 6.1 ± 1 mm 2 ; axilla 5.9 ± 0.9 mm 2 . The CSA at the wrist was the largest compared with other levels ( P < 0.001), and it increased with advancing age ( P < 0.002). Conclusions : These normative data show that median nerve CSA is not uniform along its length. There are differences between gender, and values increase with advancing age. Muscle Nerve 49 : 284–286, 2014