Hip & Thigh OIA Flashcards
Psoas major
Origin: sides of T12-L5 and intervertebral discs
Insertion: lesser trochanter
Innervation: spinal nerves L1-L3
Main action: flexes the thigh and trunk
Iliacus
Origin: iliac fossa
Insertion: lesser trochanter
Innervation: femoral nerve (L2 and L3)
Main action: flexes the thigh and trunk
Sartorius
Origin: ASIS
Insertion: medial surface of superior shaft of tibia - pes anserinus
Innervation: femoral nerve (L2 and L3)
Main action: flexes the thigh and flexes the leg
Rectus femoris
Origin: AIIS and grove superior to acetabulum
Insertion: quadriceps tendon - patella - tibial tuberosity
Innervation: femoral nerve (L2-L4)
Main action: extends the leg and flexes thigh
Vastus lateralis
Origin: greater trochanter
Insertion: quadriceps tendon and lateral border of patella
Innervation: femoral nerve (L2-L4)
Main action: extends the leg
Vastus medialis
Origin: intertrochanteric line and linea appear
Insertion: quad tendon and medial border of patella
Innervation: femoral nerve (L2-L4)
Main action: extends leg
Vastus intermedium’s
Origin: intertrochanteric line of femur and upper 2/3 of anterior surface of the femur
Insertion: quad femoris tendon
Innervation: femoral nerve (L2-L4)
Main action: extends the leg
Biceps femoris long head
Origin: ischial tuberosity
Insertion: lateral tibia, head of fibula
Innervation: tibial nerve (S1-S3)
Main action: thigh ext, knee flex
Biceps femoris short head
Origin: linea aspera
Insertion: lateral tibia, head of fibula
Innervation: common fibula nerve (L5-S2)
Main action: thigh ext, knee flex
Semitendinosus
Origin: ischial tuberosity
Insertion: pes anserinus
Innervation: tibial nerve (L5-S2)
Main action: thigh ext and knee flex
Semimembranosus
Origin: ischial tuberosity
Insertion: medial condole of tibia
Innervation: tibial nerve (L5-S2)
Main action: thigh ext and knee flex
Adductor longus
Origin: body of pubis close to the symphysis
Insertion: linea aspera of femur
Innervation: obturator nerve (L3 and L4)
Main action: abducts thigh and rotates thigh medially
Adductor brevis
Origin: inferior pubic ramus close to the symphysis
Insertion: upper part of the linea aspera of femur
Innervation: obturator nerve (L3 and L4)
Main action: adducts thigh
Adductor magnus
Origin: inferior ramus of pubis, inferior ramus of ischium and ischial tuberosity
Insertion: linea aspera of femur and supracondylar line
Innervation: obturator nerve (L3 and L4) and branches from the sciatic
Main action: adducts thigh
Gracilis
Origin: inferior ramus of pubis
Insertion: pes anserinus
Innervation: obturator nerve (L3 and L4)
Main action: adducts thigh and flexes leg
