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Muscle Functions

Isolated and Integrated Muscle Functions

QuestionAnswer
Anterior Tibialis ISOLATED FUNCTION: concentrically accelerates dorsiflexion and inversion INTEGRATED FUNCTION: eccentrically decelerates plantarflexion and eversion, isometrically stabilizes the arch of the foot
Posterior Tibialis ISOLATED FUNCTION: concentrically accelerates plantarflexion and inversion of the foot INTEGRATED FUNCTION: eccentrically decelerates the dorsiflexion and eversion of the foot, isometrically stabilizes the arch of the foot
Soleus ISOLATED FUNCTION concentrically accelerates plantarflexion INTEGRATED FUNCTION decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex
Gastrocnemius ISOLATED FUNCTION: concentrically accelerates plantarflexion INTEGRATED FUNCTION: decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex
Peroneus Longus ISOLATED FUNCTION: concentrically plantarflexes and everts the foot INTEGRATED FUNCTION: decelerates ankle dorsiflexion, isometrically stabilizes the foot and ankle complex
Biceps Femoris - Long head INTEGRATED FUNCTION: Eccentric Action - decelerates knee extension, hip flexion, and tibial internal rotation Isometric Action - Stabilizes the lumbo-pelvic-hip complex and knee INNERVATION: tibial nerve
Biceps Femoris - Short head ISOLATED FUNCTION: concentrically accelerates knee flexion and tibial external rotation INTEGRATED FUNCTION: eccentrically decelerates knee extension, eccentrically decelerates tibial internal rotation, isometrically stabilizes the knee
Semimebranosus Isolated function: Concentrically accelerates knee flexion, hip extension, and tibial internal rotation Integrated function: Eccentrically decelerates knee extension; Eccentrically decelerates hip flexion; Eccentrically decelerates tibial external
Semitendinosus ISOLATED FUNCTON: concentrically accelerates knee flexion, hip extension, and tibial internal rotation INTEGRATED FUNCTION: eccentrically decelerates knee extension, eccentrically decelerates hip flexion, eccentrically decelerates tibial external
Vastus Lateralis ISOLATED FUNCTION: concentrically accelerates knee extension INTEGRATED FUNCTION: eccentrically decelerates knee flexion, adduction, and internal rotation, isometrically stabilizes the knee
Vastus Medialis Isolated function: Assists in concentric acceleration of knee extension. Integrated function: -Assists in eccentric deceleration of knee flexion, adduction and internal rotation during heel strike. -Assists in dynamic stabilization of the k
Vastus Intermedius Isolated function: Assists in concentric acceleration of knee extension. Integrated function: -Assists in eccentric deceleration of knee flexion, adduction and internal rotation during heel strike. -Assists in dynamic stabilization of the knee du
Rectus Femoris Isolated function: -Assists in concentric acceleration of knee extension. -Assists in concentric acceleration of hip flexion. Integrated function: -Assists in eccentric deceleration of knee flexion, adduction and internal rotation during heel s
Adductor Longus Isolated function: Assists in concentric acceleration of femoral adduction, flexion and internal rotation. Integrated function: -Assists in dynamic stabilization of the lumbo-pelvic-hip complex during functional movements. -Assists in eccentric d
Adductor Magnus - Anterior Fibers Fibers Isolated function: -Assists in concentric acceleration of femoral adduction, flexion and internal rotation. -The adductor magnus assists in concentric acceleration of hip extension. Integrated function: -Assists in dynamic stabilization of
Adductor Magnus - Posterior Isolated function: -concentrically acceleration of femoral adduction, flexion and internal rotation. -concentrically acceleration of hip extension. Integrated function: -dynamically stabilization of the lumbo-pelvic-hip complex during functi
Adductor Brevis Isolated function: -concentrically acceleration of femoral adduction, flexion and internal rotation. Integrated function: -Assists in dynamic stabilization of the lumbo-pelvic-hip complex during functional movements. -Assists in eccentric de
Gracilis Isolated function: -concentrically acceleration of adduction of the femur. -concentrically acceleration of internal rotation of the femur. Integrated function: -eccentrically deceleration of knee extension prior to heel strike. -eccent
Pectineus Isolated function: -concentrically acceleration of femur adduction. -concentrically acceleration of internal rotation of the hip. Integrated function: - eccentrically deceleration of abduction of the femur. -eccentrically deceleration o
Gluteus Medius Isolated function: -Assists in concentric acceleration of femur abduction. -Anterior fibers: assist in concentric acceleration of hip internal rotation. -Posterior fibers: assist in concentric acceleration of hip external rotation. Integrated fun
Gluteus Minimus Isolated function: -concentrically acceleration of hip abduction. -concentrically acceleration of hip internal rotation. Integrated function: -eccentrically deceleration of hip adduction. -eccentrically deceleration of hip external rot
Gluteus Maximus Isolated function: -concentrically acceleration of hip extension. -concentrically acceleration of hip external rotation. Integrated function: -eccentrically deceleration of hip flexion, hip adduction and hip internal rotation during the
Tensor Fascia Latae Isolated function: -concentrically accelerates hip flexion, abduction, and internal rotation Integrated function: -eccentrically decelerates hip extension, adduction, and eternal rotation -isometrically stabilizes the lumbo-pelvic-hip complex
Psoas Isolated function: -concentric acceleration of hip flexion. -concentric acceleration of hip external rotation. Integrated function: -eccentric deceleration of hip extension. -eccentric deceleration of femoral internal rotation at heel
Iliacus Isolated function: -Concentrically accelerates hip flexion and external rotation. Integrated function: -Eccentrically decelerates hip extension and internal rotation. -Isometrically stabilizes the lumbo-pelvic-hip complex.
Sartorius Isolated function: -Assists in concentric acceleration of internal rotation of the tibia. -Assists in concentric acceleration of abduction of the tibia. -Assists in concentric acceleration of knee flexion. -Assists in concentric accelerati
Piriformis Isolated function: -Assists in concentric acceleration of external rotation of hip. -Assists in concentric acceleration of hip extension. -Assists in concentric acceleration of hip abduction when the hip is flexed. Integrated function:
Rectus Abdominis Isolated function: -Assists in concentri acceleration of spinal flexion. -Assists in concentric acceleration of posterior pelvic rotation. Integrated function: -Assists in eccentric deceleration of spinal extension, lateral flexion and r
External Oblique Isolated function: -Assists in concentric acceleration of spinal flexion -Assists in concentric acceleration of contralateral rotation of the spine -Assists in concentric acceleration of posterior pelvic rotation Integrated function:
Internal Oblique Isolated function: -concentrically accelerates spinal flexion, lateral flexion, and ipsilateral rotation Integrated function: -eccentrically decelerates spinal extension, rotation, and lateral flexion -isometrically stabilizes the lumbo-pelv
Created by: Wickefitness
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