Table 1 Absolute and normalized distances between the nerve and the musculus brachialis obtained in the different study conditions

From: Anatomic relations of the median nerve to the ulnar insertion of the brachialis muscle: safety issues and implications for medial approaches to the elbow joint

  Testing condition Distance between the nerve and the musculus brachialis
Elbow position Forearm rotation Absolute (mm) Normalized to the TED (%)
Proximal Extension Pronation 11.0 [9.0–12.0] 18.6 (± 4.4)
Neutral 13.3 (± 2.3) 22.1 (± 4.6)
Supination 10.9 (± 2.7) 18.3 (± 4.9)
Flexion Pronation 22.0 [21.5–24.0] 36.0 (± 7.3)
Neutral 28.0 [25.5–29.5] 44.2 (± 7.2)
Supination 24.0 [20.0–25.5] 37.1 (± 8.2)
Distal Extension Pronation 2.8 (± 2.7) 4.6 (± 4.3)
Neutral 6.4 (± 2.5) 10.6 (± 4.0)
Supination 4.0 (± 1.7) 6.6 (± 2.9)
Flexion Pronation 9.8 (± 3.7) 16.2 (± 6.2)
Neutral 14.0 [11.0–15.0] 20.6 (± 6.2)
Supination 10.4 (± 3.1) 17.2 (± 5.0)
  1. Data are reported as mean (± SD) or median [Q1–Q3]
  2. Q1 first quartile, Q3 third quartile, SD standard deviation, TED transepicondylar distance