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Anatomy (BKS) The Muscular System Part D

The Muscular System Part D
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Most anterior compartment muscles of the hip and thigh flex the
femur at the hip and extend the leg at the knee
Posterior compartment muscles of the hip and thigh extend the
thigh and flex the leg
The medial compartment muscles all
adduct the thigh
These three groups are enclosed by
the fascia lata
The ball-and-socket hip joint permits
flexion, extension, abduction, adduction, circumduction, and rotation
The most important thigh flexors are
the tensor fasciae latae and rectus femoris
The medially located adductor muscles and sartorius assist
in thigh flexion
Thigh extension is primarily effected by the
hamstring muscles (biceps femoris, semitendinosus, and semimembranosus)
Forceful extension is aided by
the gluteus maximus
Abduction and rotation are effected by the
gluteus medius and gluteus minimus
Thigh adduction is the role of five adductor muscles
(adductor magnus, adductor longus, and adductor brevis; the pectineus, and the gracilis)
The sole extensor of the knee is
the quadriceps femoris
The hamstring muscles flex the
knee, and are antagonists to the quadriceps femoris
Muscles of the Anterior Compartment are the primary
toe extensors and ankle dorsiflexors
Muscles of the Anterior Compartment include
the tibialis anterior and extensor digitorum longus
Muscles of the Lateral Compartment plantar flex and evert
the foot
Muscles of the Lateral Compartment include
the fibularis longus and fibularis brevis muscles
Muscles of the Posterior Compartment primary flex
the foot and the toes
Muscles of the Posterior Compartment include
the gastrocnemius, soleus, tibialis posterior, flexor digitorum longus
Thigh muscles:
-Flex and extend the thigh (posterior compartment)
-Extend the leg (anterior compartment)
-Adduct the thigh (medial compartment)