Leg Muscles

Leg/Thigh

Fig.1 Rectus femoris. (posterior view)

Rectus femoris

Origin: Hip
Insertion: Patella, via ligament to Tibia
Action: Flex hip, extend knee

Fig.2 Vastus lateralis, vastus medialis
and Vastus intermedius. (anterior view)

Vastus lateralis

Origin: Femur
Insertion: Patella
Action: Extend knee

Vastus medialis

Origin: Femur
Insertion: Patella
Action: Extend knee

Vastus intermedius

Origin: Femur
Insertion: Patella
Action: Extend knee

Fig.3 Biceps femoris.

Biceps femoris

Origin: Hip
Insertion: Tibia, Fibula
Action: Flex knee, lateral rotation

Fig.4 Semimembranosus.

Semimembranosus

Origin: Hip
Insertion: Tibia, Fibula
Action: Flex knee, medial rotation

Semitendinosus

Origin: Hip
Insertion: Tibia, Fibula
Action: Flex knee, medial rotation

Fig.5 Adductor longus and Adductor magnus.

Adductor longus

Origin: Hip
Insertion: Femur
Action: Adduction, lateral rotation

Adductor magnus

Origin: Hip
Insertion: Femur
Action: Adduction, lateral rotation

Fig.6 Adductor brevis and Gracilis.

Adductor brevis

Origin: Hip
Insertion: Femur
Action: Adduction, lateral rotation

Gracilis

Origin: Hip
Insertion: Tibia
Action: Thigh adduction, flex knee

Fig.7 Sartorius

Sartorius

Origin: Hip
Insertion: Tibia
Action: Flex knee, flex and laterally rotate hip joint

Lower leg

Fig.8 Gastrocnemius.

Gastrocnemius

Origin: Femur
Insertion: Calcaneum
Action: Plantarflexion

Fig.9 Soleus.

Soleus

Origin: Tibia & Fibula
Insertion: Calcaneum
Action: Plantarflexion

Fig.10 Tibialis anterior.

Tibialis anterior

Origin: Tibia
Insertion: 1st Metatarsal
Action: Dorsiflexion and inversion (lateral rotation)

Fig.11 Peroneus longus.

Peroneus longus

Origin: Fibula
Insertion: 1st Metatarsal
Action: Plantarflexion and eversion/pronation (medial rotation)

Fig.12 Flexor digitorum longus.

Flexor digitorum longus

Origin: Tibia
Insertion: Phalanges
Action: Dorsiflexion

Fig.13 Extensor digitorum longus.

Extensor digitorum longus

Origin: Tibia
Insertion: Phalanges
Action: Dorsiflexion

Fig.14 Extensor hallucis longus.

Extensor hallucis longus

Origin: Fibula
Insertion: 1st Phalange
Action: Dorsiflexion and inversion