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Know the Origin
JATC Muscle name, function, origin, and insertion
Question | Answer |
---|---|
Rectus femoris (knee extension and hip flexion) | anterior inferior iliac spine and ilium → patella |
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 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 intermedius (knee extension) | anterior and lateral surfaces of femoral shaft → patella via quadriceps tendon and tibial tuberosity via patellar tendon |
Biceps femoris (hip extension, knee flexion, external rotation of knee and hip) | 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 |
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 anterior (dorsiflexion and inversion) | superior ⅔ of anterior surface of tibia → medial cuneiform and first metatarsal (big toe) |
Peroneus longus (eversion of foot and plantar flexion of ankle) | head of fibula, proximal ½-⅔ of lateral fibular shaft → medial cuneiform and lateral side of 1st metatarsal base (underneath the foot) |
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 |