muscles that act on the thigh OIAs

Question 1

psoas major

Answer 1

Origin: T12 and lumbar vertebrae
Insertion: lesser trochanter of femur
Action: flexes thigh and flexes trunk on femur

Question 2

Iliacus

Answer 2

Origin: iliac crest and fossa
Insertion: lesser trochanter of femur
Action: flexes thigh and flexes trunk on femur(hip joint)

Question 3

Gluteus Maximus

Answer 3

Origin: iliac crest, posterior gluteal surface of ilium, sacrum and coccyx
Insertion: upper posterior surface of femur and iliotibial tract
Action: extends and laterally rotates thigh(hip joint)

Question 4

Gluteus Medius

Answer 4

Origin: Middle gluteal surface of ilium
Insertion: greater trochanter of femur
Action: abducts and medially rotates thigh (hip joint)

Question 5

Gluteus Minimus

Answer 5

Origin: Inferior gluteal surface of ilium
Insertion: greater trochanter of femur
Action: abducts and medially rotates thigh

Question 6

Tensor Fasciae Latae

Answer 6

Origin: Iliac crest and lateral Anterior Superior Iliac Spine
Insertion: Iliotibial tract
Action: flexes, abducts and medially rotates thigh (hip joint), laterally supports knee

Question 7

Piriformis

Answer 7

Origin: Sacrum
Insertion: greater trochanter of femur
Action: laterally rotates and abducts thigh

Question 8

Obturator internus action

Answer 8

Origin:
Insertion:
Action: Laterally rotates and abducts thigh

Question 9

Adductor magnus

Answer 9

Origin: Inferior ramus of pubis and ischium
Insertion: linea aspera of femur
Action: adducts and laterally rotates thigh

Question 10

Adductor Longus

Answer 10

Origin: Crest and symphysis of pubis
Insertion: linea aspera of femur (middle)
Action: Adducts and laterally rotates thigh (hip joint)

Question 11

Adductor Brevis

Answer 11

Origin: Inferior ramus of pubis
Insertion: linea aspera of femur
Action: adducts and laterally rotates thigh

Question 12

Pectineus Action

Answer 12

Origin:
Insertion:
Action: Adducts and flexes thigh joint