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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