Medial Thigh

Question 1

Pectineus

Answer 1

Origin: superior ramus of pubis

Insertion: pectineal line of femur

Innervation: femoral nerve and sometimes obturator nerve

Blood Supply: medial circumflex femoral artery and obturator artery

Action: adducts and flexes thigh at hip

Question 2

Adductor Longus

Answer 2

Origin: body of pubis inferior to pubic crest

Insertion: middle 1/3 of linea aspera

Innervation: obturator nerve

Blood Supply: profunda femoris and medial circumflex femoral arteries

Action: adducts thigh at hip

Question 3

Adductor Brevis

Answer 3

Origin: body and inferior pubic ramus

Insertion: pectineal line and proximal part of linea aspera of femur

Innervation: obturator nerve

Blood Supply: profunda femoris, medial circumflex femoral, and obturator arteries

Action: adducts thigh at hip, weak hip flexor

Question 4

Adductor Magnus

Answer 4

Origin: inferior pubic ramus, ramus of ischium
- Hamstring part: ischial tuberosity

Insertion: gluteal tuberosity, linea aspera, medial supracondylar line
- Hamstring part: adductor tubercle of femur

Innervation: obturator nerve
- Hamstring part: tibial part of sciatic nerve

Blood Supply: femoral, profunda femoris, and obturator arteries

Action: adducts and flexes thigh
- Hamstring part: extends thigh

Question 5

Obturator Externus

Answer 5

Origin: margins of obturator foramen and obturator membrane

Insertion: trochanteric fossa of femur

Innervation: obturator nerve

Blood Supply: medial circumflex femoral artery and obturator artery

Action: laterally rotates thigh and stabilizes head of femur in acetabulum

Question 6

Gracilis

Answer 6

Origin: body and inferior ramus of pubis

Insertion: superior part of medial surface of tibia

Innervation: obturator nerve

Blood Supply: profunda femoris artery and medial circumflex femoral artery

Action: adducts thigh, flexes and medially rotates leg