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Origin and Insertion
JATC muscle name, action, origin, and insertion.
| Question | Answer |
|---|---|
| Gluteus Maximus | (hip extension and external rotation of femur): Upper ilium, sacrum, and coccyx → gluteal tuberosity on femur and iliotibial tract |
| Biceps Femoris | (hip extension, knee flexion, external rotation of both): Ischial tuberosity → head of the fibula and lateral condyle of tibia |
| Semitendinosus | (knee flexion): Ischial tuberosity → superior aspect of the medial portion of the tibial shaft |
| Semimembranosus | (knee flexion): Ischial tuberosity → the posterior surface of the medial tibial condyle |
| Rectus Femoris | (knee extension and hip flexion): anterior inferior iliac spine and ilium → patella |
| Sartorius | (hip: flexion, abduction, and external rotation/ knee: flexion and internal rotation when flexed): anterior superior iliac spine (ASIS) → the proximal medial aspect of the tibial shaft, near the tibial tubercle |
| Tensor Fascia Latae | (hip flexion, abduction, and internal rotation): anterior superior iliac spine (ASIS) and anterior aspect of the iliac crest → deep and superficial fascia of the IT band |
| Iliopsoas | (major hip flexor): iliac fossa, T12 and the lumbar → lesser trochanter of the femur |
| Pectineus | (hip flexion and adduction): pectineal line of the pubic bone → pectineal line of the femur |
| Gluteus medius | (major abductor of the hip): Dorsal ilium inferior to iliac crest → lateral and superior surfaces of the greater trochanter |
| Gluteus minimus | (helps abduct hip): Dorsal ilium between inferior and anterior gluteal line → anterior surface of the greater trochanter |
| Piriformis | (external rotation of the hip): Pelvic surface of the sacrum → greater trochanter of femur |
| Adductor Magnus | (hip adduction): inferior pubic ramus → gluteal tuberosity, medial lip of linea aspera, medial supracondylar ridge, and adductor tubercle of femur |
| Adductor longus | (hip adduction, flexion, and external rotation): Anterior surface of the body of the pubis, lateral to pubic symphysis → middle third of the linea aspera of femur |
| Gracilis | (hip adduction, knee flexion, knee internal rotation): Medial surface of the inferior body of the pubis → proximal aspect of the medial surface of the tibia |
| Adductor Brevis | (hip abduction and flexion): Anterior surface of inferior pubic ramus, inferior to adductor longus → medial lip of linea aspera of femur |
| Vastus Medialis | (knee extension, stabilizes patella): inferior intertrochanteric line, medial lip of linea aspera, upper medial supracondylar of femur → patella via quadriceps tendon and tibial tuberosity via patellar tendon. |
| Vastus Lateralis | (knee extension): Greater trochanter, intertrochanteric line, and linea aspera of the femur → patella via quadriceps tendon and tibial tuberosity via patellar tendon. |
| Vastus Intermedius | (knee extension): anterior and lateral femoral shaft → patella via quadriceps tendon and tibial tuberosity via patellar tendon |
| Gastrocnemius | (powerful plantar flexion): Medial head from the posterior non articular surface of the medial femoral condyle, lateral head from the lateral surface of the lateral femoral condyle → middle ⅓ of the posterior calcaneus via achilles tendon |
| Soleus | (plantar flexion): shaft of tibia and fibula → calcaneus via achilles tendon |
| Tibialis posterior | (inversion of foot, aids plantarflexion): interosseous membrane of the tibia and fibula → navicular bone with slips to cuneiform, cuboid metatarsals 2-4 |
| Tibialis anterior | (dorsiflexion and inversion): superior ⅔ of anterior surface of tibia → medial cuneiform and first metatarsal (big toe) |
| Flexor digitorum longus | (flexes the lateral 4 toes): middle half of the tibia → four tendons into distal phalanges of lateral 4 toes |
| Flexor hallucis longus | (extends great toe and dorsiflexion of ankle): Anterior surface of fibula and adjacent interosseous membrane → base and dorsal center of the distal phalanx of big toe |
| Peroneus longus | (eversion of foot and plantar flexion of ankle): Head of fibula, upper ½-⅔ of lateral fibular shaft → medial cuneiform and lateral side of 1st metatarsal base |
| Peroneus brevis | (foot eversion and plantar flexion of ankle): Inferior ⅔ of lateral fibular surface, anterior and posterior intermuscular septa of leg →base of 5th metatarsal |
Created by:
smithlil005
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