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Table 1 Numerical grading system for gross evaluation, as proposed by Peterson et al. [15]

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

Tissue Grade Definition
Skin and muscle fascia 1 Entirely closed
2 Partially open
3 Completely open
Nerve adherence 1 No dissection or mild blunt dissection
2 Some vigorous blunt dissection
3 Sharp dissection required