Research Article
[Retracted] Diagnosis of Waist Muscle Injury after Exercise Based on High-Frequency Ultrasound Image
Table 2
Clinical symptoms and signs of nerve injury at different levels were summarized.
| Affected nerve root | Painful area | Shallow sensory decline | Decreased muscle strength |
| L4 | Waist, hip, anterior and outer thighs, inner calf | Anterolateral thigh | Quadriceps muscle strength | L3 | Sacroiliac, hips, outer thighs, outer calves, back of feet | Outer calf | First toe extension | L2 | Sacroiliac, waist, buttocks, back of thighs | Back of the calf | Toe flexion | L1 | Calf posterior lateral, posterior lateral | Outside of foot | Back extensor strength |
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