Hamstring Injury (Chronic)

Severe muscle disability (per § 4.56(d)(4)): through-and-through or deep penetrating wound by small high-velocity missile or large low-velocity missile, with extensive debridement, prolonged infection, or sloughing of soft parts. Objective findings: ragged / depressed / adherent scars indicating wide damage to muscle groups; loss of deep fascia, muscle substance, or normal firm resistance; palpable evidence of weakened contraction.

Moderately Severe muscle disability (per § 4.56(d)(3)): through-and-through or deep penetrating wound by small high-velocity or large low-velocity missile, with debridement, prolonged infection, or sloughing of soft parts, with intermuscular scarring. Objective: moderate loss of deep fascia / muscle substance / normal firm resistance; tests of strength and endurance demonstrate positive impairment.

Moderate muscle disability (per § 4.56(d)(2)): through-and-through or deep penetrating wound of short track from a single bullet, small shell, or shrapnel fragment, without high-velocity explosive effect, debridement residuals, or prolonged infection. Objective: short-track entrance/exit scars; some loss of deep fascia or muscle substance; impairment of muscle tonus and lowered threshold of fatigue.

Slight muscle disability (per § 4.56(d)(1)): simple wound without debridement or infection; minimal scar; no fascial defect, atrophy, or impaired tonus; no functional impairment; no retained metallic fragments.