| RF | rectus femoris |
| SKG | stiff knee gait |
| BoNT-A | botulinum toxin type A |
| MD | Muscle depth |
| MT | Muscle Thickness |
| CSA | Cross-sectional Area |
| MEI | Mean Echo Intensity |
| MAS | Modified Ashworth Scale |
| ES | electrical stimulation |
| JCP | juvenile cerebral palsy |
| RF | rectus femoris |
| SKG | stiff knee gait |
| BoNT-A | botulinum toxin type A |
| MD | Muscle depth |
| MT | Muscle Thickness |
| CSA | Cross-sectional Area |
| MEI | Mean Echo Intensity |
| MAS | Modified Ashworth Scale |
| ES | electrical stimulation |
| JCP | juvenile cerebral palsy |