LE Flashcards
OIN peroneus longus
O: head and proximal 2/3 lateral fibula; lateral tibial condole and rib/fib capsule
I: medial aspect plantar surfaces 1st metatarsal and 1st cuneiform
N: superficial peroneal n.
Action peroneus longus
Plantar flexion at ankle
Eversion of foot
OIN peroneus brevis
O: distal and lateral 2/3 of fibula
I: base of 5th metatarsal
N: superficial peroneal n
Action peroneus brevis
Primarily eversion
Assists plantar flexion
OIN peroneus tertius
O: distal 1/3 anterior fibula and interosseous membrane
I: dorsal surface of the base or shaft of 5th metatarsal
N: deep peroneal n
Action peroneus tertius
Assist with dorsiflexion at the ankle and eversion of food
OIN tibialis anterior
O: Proximal anterolateral 2/3 tibia and adjacent interosseous membrane
I: 1st metatarsal base and medial first cuneiform
N: deep peroneal nerve
Action tibialis anterior
Dorsiflexes ankle
Inverts (supinates) foot
OIN extensor digitorum longus
O: lateral tibial condole, proximal 2/3 anteromedial fibula, adjacent interosseous membrane
I: medial and distal phalanges of toes 2-5
N: deep peroneal nerve
Action exterensor digitorum longus
O: lateral tibial condole, proximal 2/3 anteromedial fibular, interosseous membrane
I: middle and distal phalanges of toes 2-5
N: deep peroneal nerve
Action extensor digitorum longus
Extends joints of toes 2-5
OIN extensor hallucinate longus
O: middle anterior fibula and adjacent interosseous membrane
I: distal phalanx hallux
N: deep peroneal n
Action extensor hallucinate longus
Extends (dorsiflexes) big toe
*with extensor hallucis brevis)
OIN flexor digitorum longus
O: middle 1/3 posterior tibia
I: plantar base of distal phalanges of toes 2-5
N: tibial nerve
Action: flexor digitorum longus
Flexes toes 2-5
Assists plantar flexion
OIN flexor hallicus longus
O: distal 2/3 posterior fibula and interosseous membrane
I: plantar surface of distal phalanx of hallux
N: tibial nerve
Action flexor hallicus longus
Flexes hallux
OIN tibialis posterior
O: posterior proximal lateral shaft of tibia, proximal medial shaft of fibula, interosseous membrane
I: plantar aspect of cuneiform and bases of metatarsals 2-5; navicular and 1st cuneiform and cuboid
N: tibial nerve
Action tibialis posterior
Inversion
Plantar flexion
OIN gastrocnemius
O: posterior aspect of femur
I: unites with soleus to form tendo-calcaneus to insert on tuberosity on the posterior aspect of calcaneus
N: tibial nerve
Action gastrocnemius
Primary plantar flexors*
Flexes knee**
- with soleus
- *with hamstrings and popliteus
OIN soleus
O: soleal line, posterior tibia, proximal posterior fibula
I: unites with gastroc to form Achilles’ tendon to insert on middle part of calcaneal tuberosity
N: tibial nerve
Action soleus
Plantar flexion of the foot
OIN popliteus
O: lateral femoral epicondyle
I: posterior aspect proximal tibia
N: tibial n
Action popliteus
Internally rotates tibial in open kinetic chain
Externally rotates femur when tibia is fixed (closed kinetic chain)
OIN semitendinosus
O: ischial tuberosity
I: proximal medial tibia and pes anserinus
N: tibial n
Action semitendinosus
Primarily knee flexion
Internally rotates tibia
Assists hip extension and internal rotation
same as semimembranosus
OIN semimembranosus
O: ischial tuberosity
I: posterior medial tibial condyle
N: tibial nerve
Action semimembranosus
Primarily knee flexion
Internally rotates tibia
Assists hip extension and internal rotation
same as semitendinosus
OIN biceps femoris
O: 2 heads
LONG O: ischial tuberosity
SHORT O: lateral linea aspera and lateral supracondylar line of posterior distal femur
I: superolateral aspect of fibular head
N: sciatic
LONG: tibial
SHORT: peroneal n
Action biceps femoris
Knee flexion
When knee is flexed: externally rotates leg
LONG: extension and external rotation at hip
OIN sartorius
O: ASIS
I: pes anserine - proximal medial tibia
N: femoral n
Action sartorius
HIP: Flexes, ABDucts, laterally rotates
KNEE: flexes and medially rotates
OIN rectus femoris
O: AIIS, brim of acetabulum
I: tibial tuberosity via infrapatellar tendon
N: femoral n
Action rectus femoris
Extends knee
Flexes hip
OIN vastus intermedius
O: anterolateral proximal 2/3 of femur
I: tibial tuberosity
N: femoral n
Action vastus intermedius
Knee extension
OIN vastus medialis
O: medial femur
I: tibial tuberosity
N: femoral nerve
Action vastus medialis
Knee extension
OIN vastus lateralis
O: posterior greater trochanter, lateral gluteal tuberosity, proximal 1/2 lateral lip of linea aspera
I: tibial tuberosity
N: femoral nerve
Action vastus lateralis
Knee extension
