Anterior View
Overactive
Adductor Longus - accelerates hip adduction , flexion, and internal rotation .
Adductor Magnus, Anterior Fibers - accelerates hip adduction , flexion, and internal rotation .
Adductor Brevis - accelerates hip adduction , flexion, and internal rotation .
Gracilis - accelerates hip adduction , flexion, and internal rotation ; assists in tibial internal rotation.
Pectineus - accelerates hip adduction , flexion, and internal rotation .
Tensor Fascia Latae - accelerates hip flexion, abduction, and internal rotation .
Biceps Femoris-Short Head - accelerates knee flexion and tibial external rotation .
Lateral Gastrocnemius - accelerates plantar flexion and externally rotates tibia .
Vastus Lateralis - accelerates knee extension.
Underactive
Gluteus Medius, Posterior Fibers - accelerates hip abduction and external rotation .
Gluteus Maximus - accelerates hip extension and external rotation .
Semimembranosus - accelerates knee flexion, hip extension, and tibial internal rotation .
Semitendinosus - accelerates knee flexion, hip extension, and tibial internal rotation .
Medial Gastrocnemius - accelerates plantar flexion and internally rotates tibia .
Vastus Medialis - accelerates knee extension.
Overactive
Quadratus Lumborum - spinal lateral flexion .
Underactive
Gluteus Medius, Anterior Fibers - accelerates hip abduction and internal rotation.
Gluteus Medius, Posterior Fibers - accelerates hip abduction and external rotation.
Overactive
Quadratus Lumborum - spinal lateral flexion .
Underactive
Gluteus Medius, Anterior Fibers - accelerates hip abduction and internal rotation.
Gluteus Medius, Posterior Fibers - accelerates hip abduction and external rotation.
Overactive
Internal Oblique - spinal flexion (bilateral), lateral flexion, and ipsilateral rotation .
External Oblique - spinal flexion, lateral flexion, and contralateral rotation .
Underactive
Gluteus Medius, Anterior Fibers - accelerates hip abduction and internal rotation.
Gluteus Medius, Posterior Fibers - accelerates hip abduction and external rotation.
Transverse Abdominis (Instrinsic Core Stabilizer) - increases intra-abdominal pressure. Supports the abdominal viscera.
Multifidus (Instrinsic Core Stabilizer) - spinal extension and contralateral rotation .
Internal Oblique (Instrinsic Core Stabilizer) - spinal flexion (bilateral), lateral flexion, and ipsilateral rotation .
Transversospinalis: Thoracis Division (Instrinsic Core Stabilizer) - produces spinal extension and lateral flexion; extension and contralateral rotation of the head.
Diaphragm (Instrinsic Core Stabilizer) - pulls the central tendon inferiorly, increasing the volume in the thoracic cavity.
Overactive
Internal Oblique - spinal flexion (bilateral), lateral flexion, and ipsilateral rotation .
External Oblique - spinal flexion, lateral flexion, and contralateral rotation .
Piriformis - accelerates hip external rotation , abduction, and extension.
Underactive
Gluteus Medius, Anterior Fibers - accelerates hip abduction and internal rotation.
Gluteus Medius, Posterior Fibers - accelerates hip abduction and external rotation.
Transverse Abdominis (Instrinsic Core Stabilizer) - increases intra-abdominal pressure. Supports the abdominal viscera.
Multifidus (Instrinsic Core Stabilizer) - spinal extension and contralateral rotation .
Internal Oblique (Instrinsic Core Stabilizer) - spinal flexion (bilateral), lateral flexion, and ipsilateral rotation .
Transversospinalis: Thoracis Division (Instrinsic Core Stabilizer) - produces spinal extension and lateral flexion; extension and contralateral rotation of the head.
Diaphragm (Instrinsic Core Stabilizer) - pulls the central tendon inferiorly, increasing the volume in the thoracic cavity.