Module 2 Muscles Flashcards
Rectus Femoris o/i
O: the anterior inferior iliac spine
I: tibial tuberosity (via the patella and patellar ligament)
Rectus Femoris Actions
Extends the knee at tibiofemoral joint
Flex the hip at the coxal joint
Rectus Femoris nerve
Femoral nerve
Vastus Intermedius o/i
O: anterior and lateral shaft of femur
I: tibial tuberosity (via the patella and patellar ligament)
Vastus medialis o/i
O: Medial lip of linea aspera
I: Tibial tuberosity (via the patella and patellar ligament)
Vastus lateralis o/i
O: lateral lip of linea aspera, gluteal tuberosity and greater trochanter
I: Tibial tuberosity (via the patella and patellar ligament)
Vastus group nerve
Femoral nerve
Vastus group actions
Extend the knee tibiofemoral joint
Tensor fascia latae (TFL) o/i
O: iliac crest, posterior to ASIS (anterior superior iliac spine)
I: iliotibial tract
Tensor fascia latae (TFL) actions
Flexes hip at the coxal joint
Abducts the hip at the coxal joint
Medially rotates the hip at the coxal joint
Tensor fascia latae (TFL) nerve
Superior gluteal nerve
Adductor Longus o/i
O: pubic tubercle
I: pectineal line and medial lip of linea aspera
Adductor Longus actions
Adducts the hip at the coxal joint
Medially rotates the hip at the coxal joint
Assists to flex the hip at the coxal joint
Adductor Longus nerve
Obturator nerve
Gluteus Maximus o:i
O: coccyx, edge of sacrum, posterior iliac crest, sacrotuberous and sacroiliac ligaments
I: iliotibial tract (upper fibers) and gluteal tuberosity (lower fibres)
Gluteus Maximus actions
Extends , laterally rotates and abducts the hip at the coxal joint
Lower fibers adduct the hip at the coxal joint
Gluteus Maximus nerve
Inferior gluteal nerve
Gluteus Medius o/i
O: gluteal surface of the ilium, between posterior and anterior gluteal lines, just below the iliac crest
I: lateral aspect of greater trochanter
Gluteus Medius actions
All fibers: abduct the hip at the coxal joint Lower
Posterior fibers:
abduct, extend and laterally rotate the hip at the coxal joint
Posteriorly tilt and depress the same side pelvis at the hip joint
Anterior fibers:
abduct, flex and Medially rotate the hip at the coxal joint
Anteriorly tilt and depress the pelvis at the hip joint
Gluteus medius nerve
Superior gluteal nerve
Bicep Femoris o/i
O: ischial tuberosity (long head) and the lateral lip of linea aspera of the femur (short head)
I: head of the fibula
Bicep Femoris actions
Flex the knee at the tibiofemoral joint
Extend the hip at the coxal joint
Tilt pelvis posteriorly
Laterally rotate the flexed knee at the tibiofemoral joint and the hip at the coxal joint
Bicep Femoris nerve
Sciatic nerve
(long head - tibial branch)
(Short head- fibular branch)
Semitendinosus o/i
O: ischial tuberosity
I: proximal, medial shaft of the tibia at the pes anserinus tendon
Semitendinosus actions
Flex the knee at the tibiofemoral joint
Extend the hip at the coxal joint
Tilt pelvis posteriorly
Medially rotate the flexed knee at the tibiofemoral joint and hip at the coxal joint
Semitendinosus nerve
Sciatic nerve (tibial branch)
Semimembranosus o/i
O: ischial tuberosity
I: posterior aspect of the medial condyle of the tibia
Semimembranosus actions
Flex the knee at the tibiofemoral joint
Extend the hip at the coxal joint
Tilt pelvis posteriorly
Medially rotate the flexed knee at the tibiofemoral joint and hip at the coxal joint
Semimembranosus nerve
Sciatic nerve (tibial branch)
