Table 2. The LSUHSC grading system for buttock or tight-level peroneal division lesions 4 .

Grade	Criteria
Abbreviations: AT, anterior tibialis; ED, extensor digitorum; EHD, extensor hallucis longus; LSUHSC, Louisiana State University Health Sciences Center.
0	No or little function in short head of biceps; no peroneally innervated muscle function; no AT, EHD, or ED function
1	Short head of the biceps contracts; no distal peroneally innervated muscle function
2	Short head of the biceps contracts; peroneally innervated muscles contract vs. gravity or better; no trace of AT; no other distal motor function
3	Short head of the biceps contracts; peroneally innervated muscles ≥ grade 3; AT contracts vs. gravity, but function of EHD and ED for toes usually absent
4	Short head of the biceps and peroneally innervated muscles contract, as does AT, which is ≥ grade 3; EHD and ED may have trace function
5	Short head of the biceps and peroneally innervated muscles contract, as does AT, which is ≥ grade 4; EHD and ED contract, at least vs. gravity