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30 terms

Isolated and Integrated Muscle functions

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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