Thigh & Knee Flashcards
Adductor brevis
O: Inferior pubic ramus
I: Upper third of the medial lip of the
linea aspera of the femur
A: Hip joint: majority adduction, minor flexion
In: Obturator n.
Adductor longus
O: Anterior pubic surface
I: Lower two-thirds of the medial lip of the linea aspera on the posterior surface
A: Majority hip adduction, minor flexion
In: Obturator n.
Adductor magnus
O: Anterior and Inferior pubic surface, Ischial tuberosity
I: Lower third of the medial lip of the linea aspera on the posterior surface, and adductor tubercle
A: Powerful hip adductor, some extension and hip flexion
In: Obturator and sciatic nn.
Gracilis
O: Ischiopubic ramus
I: Medial border of the tibia via pes anserinus
tendon
A: Hip flexion, adduction and internal rotation
Knee flexion
In: Obturator n.
Sartorius
O: ASIS
I: Medial border of the tibia via pes anserinus
tendon
A: Hip: abduction, flexion, external rotation
Knee: flexion, tibial internal rotation
In: Femoral nerve
Tensor fasciae latae (TFL)
O: ASIS
I: ITB (iliotibial band/tract) on Gerdy’s tubercle
A: Hip: flexion, internal rotation and abduction
Small amount of knee: flexion and external rotation
In: Femoral n.
Rectus femoris
O: AIIS
I: Anterior Tibial Tuberosity via the quadriceps
tendon
A: Hip joint: small flexion
Knee joint: powerful extension
In: Femoral n.
Vastus intermedius
O: Anterolateral surface of femoral shaft
I: Anterior Tibial Tuberosity via Quadriceps
tendon
A: Knee: extension
In: Femoral n.
Vastus medialis
O: Medial lip of linea aspera and medial suprachondylar ridge of femur
I: Medial patellar retinaculum;
Medial border of quadriceps tendon
Anterior tibial tuberosity via patellar lig.
A: Knee: extension, medial patella glide
In: Femoral n.
Vastus lateralis
O: Lateral lip of linea aspera, inferior portion of greater trochanter and intertrochanteric line
I: Lateral patellar retinaculum
Lateral border of quadriceps tendon
Anterior Tibial Tuberosity via patellar lig.
A: Knee: extension, lateral patella glide
In: Femoral n.
Biceps femoris (Long and Short head)
O:
Long: Ischial tuberosity and lower part of sacrotuberous ligament
Short: lateral lip of linea aspera
I: Head of fibula
A: Hip: extension
Knee: flexion, external rotation
In: Sciatic n.,
BUT long head innervated by tibial branch and short head by fibular branch
Semitendinosus
O: Ischial tuberosity
I: Medial border of the tibia via pes anserinus
tendon
A: Hip: extension
Knee: flexion, internal rotation
In: Tibial branch of sciatic n.
Semimembranosus
O: Ischial tuberosity
I: Medial tibial condyle
A: Hip: extension, adduction
Knee: flexion, internal rotation
In: Tibial branch of sciatic n.
