Lower Extremity Flashcards
Semimembranosus
PA: Ischial tuberosity
DA: posterior part of medial condyle of tibia
NI: tibial division of Sciatic nerve
MA: extend thigh flex leg and rotate it medially
Semitendiosus
PA: ischial tuberosity
DA: medial surface of superior part of tibia
NI: tibial division of sciatic nerve
MA: extend thigh flex leg and rotate it medially
Biceps femoris
PA: long head: ischial tuberosity short head: linea aspera and lateral supracondylar line of femur
DA: lateral side of head of fibula
NI: long: tibial division of sciatic nerve short: common fibular division of sciatic nerve
MA: flexes the knee, rotates the tibia laterally; long head also extends hip joint
Gluteus minimus
PA: external surface of illumination between anterior and inferior gluteal lines
DA: anterior surface or greater trochanter or femur
NI: superior gluteal nerve
MA: abducts and medially rotates thigh; keeps pelvis level when opposite leg is raised
Gluteus medius
PA: external surface of illumination between anterior and posterior gluteal lines
DA: lateral surface or greater trochanter or femur
NI: superior gluteal nerve
MA: abducts and medially rotates thigh; keeps pelvis level when opposite leg is raised
Gluteus Maximus
PA: ilium posterior to posterior gluteal line, dorsal surface of sacrum and coccyx, sacrotuberous ligament
DA: Illiotibial tract that inserts at lateral condyle of the tibia; gluteal tuberosity of femur
NI: inferior gluteal nerve
MA: extends thigh (especially from a flexed position)and assist in lateral rotation; steadies thigh
Flexor hallicus longus
PA: Inferior 2/3 of posterior surface of fibula and inferior part of interosseous membrane
DA: Base of distal phalanx of great toe
NI: tibial nerve
MA: flexes great toe at all joints and weakly plantar flexes ankle: supports medial longitudinal arches of foot
Flexor digitorum longus
PA: medial part of posterior surface of tibia, inferior to soleal line and by a broad tendon to fibula
DA: base of distal phalanges of digits 2-5
NI: tibial nerve
MA: flexes lateral 4 digits and plantar flexes ankle; supports longitudinal arches of the foot
Gastrocnemius
PA: Lateral head: lateral aspect of the lateral condyle of femus
medial head: popliteal surface of femur, superior to medial condyle
DA: posterior surface of calcaneus via calcaneal tendon
NI: tibial nerve
MA:plantar flexes ankle when knee is extended, flexes knee joint
Soleus
PA:posterior aspect of head of fibula, superior 1/4 of posterior surface of fibular soleal line and medial border of tibia
DA: posterior surface of calcaneus via calcaneal tendon
NI: tibial nerve
MA: powerful plantar flexor of the ankle; independent of position of knee and steadies leg on foot
Plantaris
PA: inferior end of supracondylar line of femur and oblique popliteal ligament
DA: posterior surface of calcaneus via calcaneal tendon
NI: tibial nerve
MA: weakly assists gastrocnemius in plantarflexing ankle and flexing knee; primary role is proprioception
popliteus
PA: lateral surface of lateral condyle of the femur and lateral meniscus
DA: posterior surface of tibia, superior to soleal line
NI: tibial nerve
MA: weakly flexes the knee and unlocks/ locks it (screw home mechanism)
tibialis anterior
PA: lateral condyle and superior half of lateral surface of tibia and interosseous membrane
DA: medial and inferior surfances of medial cuneiform and base of 1st metatarsal
NI: deep fibular nerve
MA: dorsiflexes ankle and inverts foot
Tibialis posterior
PA: Interosseous membrane, posterior surface of tibia, posterior surface of the fibula
DA: tuberosity of navicular, cuneiform and cuboid and bases of metatarsals 2, 3, 4
NI: tibial nerve
MA: plantar flexes ankle and inverts foot
Fibularis tertius
PA: Inferior 1/3 of anterior surface of fibula
DA: dorsum of base of 5th metatarsal
NI: deep fibular nerve
MA: dorsiflexes ankle and aids in eversion of the foot
Extensor hallucis longus
PA: middle part of anterior surface of fibula and interosseous membrane
DA: dorsal aspect of base of distal phalanx of hallux
NI: deep fibular nerve
MA: extend big toe and dorsi flex ankle
extensor digitorum longus
PA: lateral condyle of tibia and superior 3/5 of medial surface of the fibula and interosseous membrane
DA: middle and distal phalanges of lateral 4 digits
NI: deep fibular nerve
MA: extends lateral 4 digits and dorsiflexes ankle and may have slight eversion
fibularis longus
PA: head and superior 2/3 of lateral surface of fibula
DA: base of 1st metatarsal and medial cuneiform
NI: superficial fibular nerve
MA: everts foot and weakly plantarflexes ankle
fibularis brevis
PA: inferior 2/3 of lateral surface of fibula
DA: dorsal surface of tuberosity on lateral surface of 5h metatarsal
NI: superficial fibular nerve
MA: everts foot and weakly plantarflexes ankle
Sartorius
PA: anterior superior iliac spine (ASIS) and superior part of notch inferior to ASIS
DA: superior part of medial surface of tibia
NI: femoral nerve
MA:5 flexes, abducts, and laterally rotates the thigh at hip joint, flexes and medially rotates leg at knee joint
pectineus
PA: superior ramis of pubis
DA: pectineal line of femur, just inferior to lesser trochanter
NI: femoral nerve, may receive branch from obturator nerve
MA: adducts and flexes thigh; assists with medial rotation
vastus lateralis
PA: greater trochanter and lateral lip of linea aspera of femur
DA: base of patella and by patellar ligament to tibial tuberosity
NI: muscular branches of femoral nerve
MA: extend leg at knee joint
Vastus intermedius
PA: Anterior and lateral surfaces of femur
DA: base of patella and by patellar ligament to tibal tuberosity
NI: muscular branches of the femoral nerve
MA: extend leg at knee joint
vastus medialis
PA: intertrochanteric line and medial lip of linea aspera of femur
DA: bae of patella and by patellar ligament to tibial tuberosity
NI: muscular branches of femoral nerve
MA: extend leg at knee joint
NOTE: VMO
