Origins & Insertions

Rectus Femoris

O: anterior inferior iliac spine (AIIS)

I: tibial tuberosity (via patella & patellar ligament)

Vastus Medialis

O: medial lip of linea aspera

I: tibial tuberosity (via patella & patellar ligament)

Vastus Lateralis

O: lateral lip of linea aspera, gluteal tuberosity, & greater trochanter

I: tibial tuberosity (via patella & patellar ligament)

Vastus Intermedius

O: anterior and lateral shaft of femur

I: tibial tuberosity (via patella & patellar ligament)

What is the common insertion point of all of the quadricep muscles?

tibial tuberosity (via patella & patellar ligament)

Biceps Femoris

O: ischial tuberosity (long head) & lateral lip of linea aspera (short head)

I: head of fibula

Semitendinosus

O: Ischial tuberosity

I: Pes Anserinus tendon (proximal medial shaft)

Semimembranosus

O: Ischial tuberosity

I: posterior aspect of medial condyle of tibia

Tensor Fascia Latae (TFL & IT band)

O: iliac crest (posterior to ASIS)

I: iliotibial tract

Gastrocnemius

O: posterior surface of condyles of femur

I: calcaneus

Soleus

O: soleal line, proximal posterior surface of tibia, & posterior aspect of head of fibula

I: calcaneus

Plantaris

O: lateral supracondylar line of femur

I: calcaneus

Popliteus

O: lateral condyle of femur

I: proximal posterior aspect of tibia

Fibularis/Peroneus Longus

O: head of fibula & proximal 2/3 lateral fibula

I: base of 1st metatarsal & medial cuneiform

Fibularis/Peroneus Brevis

O: distal 2/3 lateral fibula

I: tuberosity of 5th metatarsal

Tibialis Anterior

O: lateral condyle of tibia, proximal lateral surface of tibia, & interosseous memnrane

I: base of 1st metatarsal & medial cuneiform

Which muscles insert on the base of 1st metatarsal & medial cuneiform?

• Fibularis/peroneus longus

• tibialis anterior

Extensor Hallucis Longus

O: middle anterior surface of fibula & interosseous membrane

I: dorsal aspect of distal phalanx of 1st toe

Extensor Digitorum Longus

O: lateral condyle of tibia, proximal lateral surface of tibia, & interosseous membrane

I: dorsal aspect of middle & distal phalanges of toes 2-5

Tibialis Posterior

O: proximal posterior shafts of tibia and fibula & interosseous membrane

I: base of metatarsals 2-4 & all 5 midfoot tarsal bones

Flexor Digitorum Longus

O: middle posterior surface of tibia

I: plantar aspect of distal phalanges of toes 2-5

Flexor Hallucis Longus

O: middle ½ of posterior fibula

I: plantar aspect of distal phalanx of 1st toe

Extensor Digitorum Brevis

O: dorsal surfaces of calcaneus

I: toes 2-4 (via extensor digitorum longus tendon)

Flexor Digitorum Brevis

O: medial process of calcaneus & plantar aponeurosis

I: middle phalanges of toes 2-5 (splits)

Abductor Hallucis

O: medial process of calcaneus & plantar aponeurosis

I: proximal phalanx of 1st toe (medial surface) & medial sesamoid bone

Abductor Digiti Minimi

O: lateral process of calcaneus & plantar aponeurosis

I: proximal phalanx of 5th toe (lateral surface)