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Table 4 Results of the neuroma size and the scar formation index for each group

From: Effect of herbal extracts on peripheral nerve regeneration after microsurgery of the sciatic nerve in rats

Group (n) Neuroma size
Mean (range)
Scar formation index
Mean (range)
Group 1 (10) 2.05 (1.5–3.0) 0.54 (0.3–1.0)
Group 2 (8) 1.75 (1.0–2.5) 0.63 (0.2–1.0)
Group 3 (10) 1.20 (1.0–1.5) 0.9 (0.5–2.0)
Group 4 (7) 1.39 (1.2–1.5) 0.31 (0.1–0.5)
Group 5 (10) 1.34 (1.1–1.8) 0.33 (0.2–0.5)
  1. Group 1: Control, Group 2: Astragalus mongholicus Bunge, Group 3: Coptis japonica (Thunb.) Makino, Group 4: Aconitum carmichaelii Debeaux, Group 5: Paeonia lactiflora Pall
  2. Neuroma size = ratio of the diameter of the nerve on the site of neurorrhaphy to that on the normal proximal nerve
  3. Scar tissue formation index = ratio of the thickness of the epineural scar tissue to the nerve diameter (Fig. 1)