Isolated and Integrated Muscle functions

Created by S_Hix 

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1. Anterior Tibialis

Concentrically accelerates Xdorsiflexion and inversion
Eccentrically decelerates plantarflexion and eversion
Isometrically stabilizes the arch of the foot

2. Posterior Tibialis

Concentrically accelerates plantarflexion and inversion of the foot
Eccentrically decelerates the dorsiflexion and eversion of the foot
Isometrically stabilizes the arch of the foot

3. Soleus

Concentrically accelerates plantarflexion
Decelerates ankle dorsiflexion
Isometrically stabilizes the foot and ankle complex

4. Gastrocnemius

Concentrically accelerates plantarflexion
Decelerates ankle dorsiflexion
Isometrically stabilizes the foot and ankle complex

5. Peroneus Longus

Concentrically plantarflexes and everts the foot
Decelerates ankle dorsiflexion
Isometrically stabilizes the foot and ankle complex

6. Biceps Femoris - Long Head

Concentrically accelerates knee flexion and hip extension
Tibial External rotation
Eccentrically decelerates knee extension
Eccentrically decelerates hip flexion
Eccentrically decelerates tibial internal rotation at mid-stance of the gait cycle
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

7. Biceps Femoris - Short Head

Concentrically accelerates knee flexion and tibial external rotation
Eccentrically decelerates knee extension
Eccentrically decelerates tibial internal rotation
Eccentrically stabilizes the knee

8. Semimebranosus

Concentrically accelerates knee flexion, hip extension and tibial internal rotation
Eccentrically decelerates knee extension
Eccentrically decelerates hip flexion
Eccentrically decelerates tibial external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

9. Semitendinosus

Concentrically accelerates knee flexion, hip extension and tibial internal rotation
Eccentrically decelerates knee extension
Eccentrically decelerates hip flexion
Eccentrically decelerates tibial external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

10. VastusLateralis

Concentrically accelerates knee extension
Eccentrically decelerates knee flexion, adduction, and internal rotation
Isometrically stabilizes the knee

11. VastusMedialis

Concentrically accelerates knee extension
Eccentrically decelerates knee flexion, adduction, and internal rotation
Isometrically stabilizes the knee

12. VastusIntermedius

Concentrically accelerates knee extension
Eccentrically decelerates knee flexion, adduction, and internal rotation
Isometrically stabilizes the knee

13. Rectus Femoris

Concentrically accelerates knee extension and hip flexion
Eccentrically decelerates knee flexion, adduction, and internal rotation
Decelerates hip extension
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

14. Adductor Longus

Concentrically accelerates hip adduction, flexion and internal rotation
Eccentrically decelerates knee flexion, abduction, and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

15. Adductor Magnus - Anterior Fibers

Concentrically accelerates hip adduction, flexion and internal rotation
Eccentrically decelerates knee flexion, abduction, and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

16. Adductor Magnus - Posterior Fibers

Concentrically accelerates hip adduction, extension and external rotation
Eccentrically decelerates hip abduction, flexion and internal rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

17. Adductor Brevis

Concentrically accelerates hip adduction, flexion and internal rotation
Eccentrically decelerates hip abduction, extension and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

18. Gracilis

Concentrically accelerates hip adduction, flexion and internal rotation
Assists in tibial rotation
Eccentrically decelerates hip abduction, extension and external rotaion
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

19. Pectineus

Concentrically accelerates hip adduction, flexion and internal rotation
Eccentrically decelerates hip abduction, extension and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

20. Gluteus Medius

Concentrically accelerates hip abduction and internal rotation(anterior fibers)
Concentrically accelerates hip abduction and external rotation(posterior fibers)
Eccentrically decelerates hip adduction and internal rotation(anterior fibers)
Eccentrically decelerates hip adduction and internal rotation(posterior fibers)
Isometrically stabilizes the lumbo-pelvic-hip complex

21. Gluteus Minimus

Concentrically accelerates hip abduction and internal rotation
Eccentrically decelerates hip adduction and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

22. Gluteus Maximus

Concentrically accelerates hip extension and external rotation
Eccentrically decelerates hip flexion and internal rotation
Decelerates tibial internal rotation via the iliotibial band
Isometrically stabilizes the lumbo-pelvic-hip complex

23. Tensor Fascia Latae

Concentrically accelerates hip flexion, abduction and internal rotation
Eccentrically decelerates hip extension, adduction and external rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

24. Psoas

Concentrically accelerates hip flexion and external rotation
Concentrically extends and rotates lumbar spine
Eccentrically decelerates hip internal rotation
Eccentrically decelerates hip extension
Isometrically stabilizes the lumbo-pelvic-hip complex

25. Iliacus

Concentrically accelerates hip flexion and external rotation
Eccentrically decelerates hip extension and internal rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

26. Sartorius

Concentrically accelerates hip flexion, external rotation and abduction
Concentrically accelerates knee flexion and internal rotation
Eccentrically decelerates hip extension and internal rotation
Isometrically stabilizes the lumbo-pelvic-hip complex and knee

27. Piriformis

Concentrically accelerates hip external rotation, abduction and extension
Eccentrically decelerates hip internal rotation, adduction and flexion
Isometrically stabilizes the hip and sacroiliac joints

28. Rectus Abdominis

Concentrically accelerates spinal flexion, lateral flexion and rotation
Eccentrically decelerates spinal extension, lateral flexion and rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

29. External Oblique

Concentrically accelerates spinal flexion, lateral flexion and contralateral rotation
Eccentrically decelerates spinal extension, lateral flexion and rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

30. Internal Oblique

Concentrically accelerate spinal flexion, lateral flexion and ipsilateral rotation
Eccentrically decelerates spinal extension, lateral flexion and rotation
Isometrically stabilizes the lumbo-pelvic-hip complex

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