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Lower Extremity Musc
| Term | Definition |
|---|---|
| Adductor Longus | Origin: Anterior pubis near symphysis (proximal to adductor brevis) Insertion: Linea aspera (distal to adductor brevis) Action: ADducts thigh |
| Adductor Brevis | Origin: Anterior pubis & inferior pubic ramus Insertion: Linea aspera Action: Adducts thigh |
| Gracilis | Origin: Inferior pubic ramus near symphysis Insertion: Medial & proximal tibia Action: ADducts thigh, flexes leg |
| Adductor Magnus | Origin: Inferior pubic ramus, ischial ramus, & ischial tuberosity Insertion: Linea Aspera & adductor tubercle Action: ADducts & extends thigh |
| vastus intermedius | origin: anterior and lateral surface of femur insertion: tibial tuberosity and patella action: extends leg |
| vastus medialis | Origin: linea aspera Insertion: tibial tuberosity Action: extends knee |
| vastus lateralis | Origin anterior and inferior to greater trochanter of femur and along linea aspera Insertion tibial tuberosity via patellar ligament Actions Extends and stabilizes knee |
| rectus femoris | origin: anterior inferior iliac spine and superior margin of acetabulum rim of ilium insertion: tibial tuberosity and patella action: extends at knee and flexion at hip |
| biceps femoris | Origin: ischial tuberosity and linea aspera of femur Insertion: head of fibula, lateral condyle of tibia Action: flexion at knee, extension and lateral rotation at hip |
| semitendinosus | Origin: ischial tuberosity Insertion: proximal, medial surface of tibia near insertion of gracilis Action: flexion at knee, extension and medial rotation at hip |
| semimembranosus | Origin: Ischial tuberosity Insertion: Posterior surface of medial condyle of tibia Action: Flexion at knee, extension and medial rotation at hip |
| sartorius | Origin: Anterior superior iliac spine of the pelvic bone Insertion: medial surface of tibia near tibial tuberosity Action: Flexion at Knee, flexion and lateral rotation at hip |
| gluteus minimus | Origin: lateral surface of ilium between inferior and anterior gluteal lines Insertion: greater trochanter of femur Action: abducts and medially rotation at hip |
| gluteus medius | Origin: anterior iliac crest of ilium, lateral surface between posterior and anterior gluteal lines Insertion: greater trochanter of femur Action: abducts and medially rotation at hip |
| gluteus maximus | Origin: iliac crest, posterior gluteal line, and lateral surface of ilium, sacrum, coccyx, and lumbodorsal fascia Insertion: iliotibial tract and gluteal tuberosity of femur Action: extension and lateral rotation at hip |
| tensor fasciae latae | Origin: Iliac crest and lateral surface of anterior superior iliac spine Insertion: iliotibial tract Action: flexion and medial rotation at hip, tenses fascia lata, which laterally supports the knee |
| tibialis posterior | Origin: interosseous membrane and adjacent shafts of tibia and fibula Insertion: tarsal and metatarsal bones Action: adduction and inversion of foot, extension (plantar flexion) at ankle |
| fibularis longus | Origin: lateral condyle of tibia, head and proximal shaft of fibula Insertion: base of first metatarsal bone and medial cuneiform bone Action: eversion of foot and extension (plantar flexion) at ankle; supports longitudinal arch |
| flexor digitorum longus | Origin: Posterior surface of tibia Insertion: Distal phalanges of toes 2-5 Action: Flexes toes 2-5 |
| flexor hallucis longus | origin: posterior surface of fibula insertion: inferior surface, distal phalanx of great toe action: flexes 1st digit (great toe) |
| soleus | Origin: Head and proximal shaft of fibula and adjacent posteromedial shaft of tibia Insertion: calcaneus by calcaneal tendon(with gastrocnemius) Action: Plantar flexion at ankle |
| popliteus | Origin lateral femoral epicondyle Insertion posterior surface of tibia proximal Action: medial rotation of tibia (or lateral rotation of femur) flexion at knee |
| gastrocnemius | Origin: femur condyles Insertion: calcaneus by calcaneal tendon Action: extension (plantar flexion) at ankle, inversion of foot, flexion at knee |
| tibialis anterior | Origin: lateral condyle and proximal shaft of tibia Insertion: base of first metatarsal bone and medial cuneiform bone Action: flexion(dorsiflexion) at ankle, inversion of foot |
| flexor hallucis brevis | Action: flexion at metatarsophalangeal joint |
| flexor digiti minimi brevis | Action: flexion at metatarsophalangeal joint of toe 5 |
| flexor digitorum brevis | Action: flexion at proximal interphalangeal joints of toes 2-5 |
| dorsal interosseous | Action: abduction at metatarsophalangeal joint of 3 and 4 |
| plantar interosseous | Action: adduction at metatarsophalangeal joints of toes 3-5 |
| extensor digitorum brevis | Action: extension at metatarsophalangeal joints of toes 1-4 |
| extensor hallucis brevis | Action: extension of great toe |
| adductor hallucis | Action: adduction at metatarsophalangeal joint of great toe |
| abductor hallucis | Action: abduction at metatarsophalangeal joint of great toe |
| abductor digiti minimi | Action: abduction at metatarsophalangeal joint of toe 5 |
Created by:
droesener
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