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The change of muscle function before and after the multilevel surgeries.
| Muscles | Loading response | Mid-stance | Terminal stance | Pre-swing | Initial swing | Mid-swing | Terminal swing |
|---|---|---|---|---|---|---|---|
| Rectus femoris | / | / | / | / | MFD | / | / |
| Biceps femoris | / | / | MTD | MTD | MTD | / | MFD |
| Semitendinosus | / | / | MTD | MTD | / | / | / |
| Tibialis anterior | / | / | / | / | / | / | MFI |
| Lateral gastrocnemius | / | MFI | MFI | / | MTD | / | MTD |
| Medial gastrocnemius | MTD | MFI | / | MFI | / | / | MTD |
MFI, muscle force increase; MFD, muscle force decrease; MTD, muscle tension decrease.
