Medial Thigh Muscles

Question 1

Origin: Pectineus

Answer 1

Superior ramus of pubis

Question 2

Origin: Adductor longus

Answer 2

body of pubis inferior to pubic crest

Question 3

Origin: Adductor brevis

Answer 3

Bod and inferior ramus of pubis

Question 4

Origin: Adductor magnus

Answer 4

Inferior ramus of pubis, ramus of ischium, and ischial tuberosity

Question 5

Origin: Gracilis

Answer 5

body and inferior ramus of pubis

Question 6

Origin: Obturator externus

Answer 6

margins of obturator foramen and obturator membrane

Question 7

Insertion: Pectineus

Answer 7

Pectineal line of femur, just inferior to lesser trochanteer

Question 8

Insertion: Adductor longus

Answer 8

middle third of linea aspera of femut

Question 9

Insertion: Adductor brevis

Answer 9

pectineal line and proximal part of linea aspera of femur

Question 10

Insertion: Adductor magnus

Answer 10

Gluteal tuberosity, llinea aspera, medial supracondylar line (adductor part)
and adductor tubercle of femur (hamstring part)

Question 11

Insertion: Gracilis

Answer 11

Superior part of medial surface of tibia

Question 12

Insertion: Obturator externus

Answer 12

Trochanteric fossa of femur

Question 13

Innervation: Pectineus

Answer 13

Femoral nerve; may receive a branch from obturator nerve (L2-L4)

Question 14

Innervation: Adductor longus

Answer 14

obturator nerve (L2-L4)

Question 15

Innervation: Adductor brevis

Answer 15

Obturator nerve (L2-L4)

Question 16

Innervation: Adductor magnus

Answer 16

Adductor part: obturator nerve (L2-L4)

Hamstring part: tibial part of sciatic nerve

Question 17

Innervation: Gracilis

Answer 17

Obturator nerve (L2-L3)

Question 18

Innervation: Obturator externus

Answer 18

Obturator nerve (L3-L4)

Question 19

Main Actions: Pectineus

Answer 19

Adducts and flexes high at hip; assists with medial rotation of thigh

Question 20

Main Actions: Adductor longus

Answer 20

Adducts and medially rotates thigh at hip

Question 21

Main Actions: Adductor brevis

Answer 21

Adducts thigh at hip and to some extent flexes it

Question 22

Main Actions: Adductor magnus

Answer 22

Adducts thigh at hip;
Adductor part: also flexes thigh at hip
Hamstring part: extends thigh

Question 23

Main Actions: gracilis

Answer 23

Adducts thigh at hip, flexes leg at knee and helps rotate it medially

Question 24

Main Actions: Obturator externus

Answer 24

Rotates thigh laterally at hip; steadies femoral head in acetabulum