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Thigh muscles OIAN
Muscles of the thigh origin, insertion, action, nerve
| Question | Answer |
|---|---|
| Tensor Fasciae Latae origin | iliac crest (posterior to anterior superior iliac spine) |
| Tensor Fasciae Latae insertion | iliotibial tract (which continues to attach to the lateral condyle of the tibia) |
| Tensor Fasciae Latae action | assists abduction, medial rotation, flexion of femur at hip and extension of knee, Prevents collapse of extended knee in ambulation |
| Tensor Fasciae Latae nerve | superior gluteal nerve |
| Sartorius origin | Anterior superior iliac spine |
| Sartorius insertion | upper medial shaft of tibia |
| Sarorius action | assists flexion, abduction, lateral rotation of femur at hip, assists flexion, medial rotation of knee |
| Sartorius nerve | femoral nerve |
| Rectus femoris origin | anterior inferior iliac spine, ilium at upper rim of acetabulum |
| Rectus femoris insertion | patella, tibial tuberosity via patellar ligament |
| Rectus femoris actions | extension of knee, assists flexion of femur at hip |
| Rectus femoris nerve | femoral nerve |
| Vastus lateralis origin | linea aspera on posterior femur, greater trochanter of femur |
| vastus lateralis insertion | patella, tibial tuberosity via patellar ligament |
| Vastus lateralis actions | extension of knee |
| Vastus lateralis nerve | femoral nerve |
| Vastus medialis origin | linea aspera on posterior femur |
| Vastus medialis insertion | patella, tibial tuberosity via patellar ligament |
| Vastus medialis actions | extension of knee |
| Vastus medialis nerve | femoral nerve |
| Vastus intermedius origin | anterior and lateral femoral shaft |
| Vastus intermedius insertion | patella, tibial tuberosity via patellar ligament |
| Vastus intermedius actions | extension of knee |
| Vastus intermedius nerve | femoral nerve |
| Pectineus origin | anterior pubis |
| Pectineus insertion | between lesser trochanter and linea aspera of posterior femur |
| Pectineus actions | flexion of femur at hip, assists adduction of femur at hip |
| Pectineaus nerve | femoral nerve |
| Adductor longus origin | anterior pubis |
| Adductor longus insertion | linea aspera on posterior femur |
| Adductor longus actions | adduction of femur at hip, assists flexion of femur at hip |
| Adductor longus nerve | obturator |
| Adductor brevis origin | anterior pubis |
| Adductor brevis insertion | linea aspera on posterior femur |
| Adductor brevis actions | adduction of femur at hip, assists flexion of femur at hip |
| Adductor brevis nerve | obturator |
| Adductor magnus origin anterior and posterior head | Anterior: inferior ramus of pubis,Posterior: Ischial tuberosity and ramus of ischium |
| Adductor magnus insertion anterior and posterior head | anterior: linea aspera of femur, posterior: adductor tubercle of femur |
| Adductor magnus actions anterior and posterior head | anterior: assists flexion and medial rotation of femur at hipposterior: assists extension and lateral rotation of femur at hip |
| Adductor magnus nerve anterior and posterior head | anterior: obturator nerve,posterior: sciatic nerve |
| Gracilis origin | inferior ramus of anterior pubis |
| Gracilis insertion | medial proximal tibia |
| Gracilis actions | adduction of femur at hip, assists flexion and medial rotation of flexed knee |
| Gracilis nerve | obturator |
| Biceps Femoris origin long and short head | long head: ischial tuberosityshort head: linea aspera |
| Biceps Femoris insertion | head of fibula (lateral aspect) |
| Biceps Femoris actions long and short head | long head: extension of hip,both heads: flexion of knee, lateral rotation of flexed knee |
| Biceps Femoris nerve | long head: sciatic nerve tibial division,short head: sciatic nerve peroneal division |
| Semitendinosis origin | ischial tuberosity |
| Semitendinosis insertion | anterior proximal tibial shaft |
| Semitendinosis actions | extension of hip, flexion of knee, medial rotation of flexed knee |
| Semitendinosis nerve | sciatic nerve -tibial division |
| Semimembrinosis origin | ischial tuberosity |
| Semimembrinosis insertion | posterior medial tibial condyle |
| Semimembrinosis actions | extension of hip, flexion of knee, medial rotation of flexed knee |
| Semimenbrinosis nerve | sciatic nerve -tibial division |