Muscles of Medial Compartment of Thigh

Question 1

Muscles

Answer 1

Pectineus, Adductor brevis, adductor longus, adductor minimis, adductor magnus, gracillis

Question 2

Pectineus OIFIn

Answer 2

O: Pectineal line of pubis
I: Pectineal line of femur
F: adduction and flexion of hip
In: FEMORAL NERVE

Question 3

Adductor Brevis* OIFIn

Answer 3

O: Narrow strip of external surface of pubic body and inferior ramus
I: Pectineal line and proximal part of linea aspera
F: Adduction of hip, lateral rotation of hip when limb is not anchored, medial rotation of hip when limb is anchored
In: Obturator nerve

Question 4

Adductor longus* OIFIn

Answer 4

O: Anterior surface of pubis between crest and symphysis
I: Middle 1/3 of linea aspera
F: Adduction and flexion of hip, lateral rotation when limb isn’t anchored, medial rotation of hip when limb is anchored
In: Obturator nerve

Question 5

Adductor minimis* OIFIn

Answer 5

O: External surface of inferior pubic ramus
I: Medial margin of gluteal tuberosity
F: Adduction of hip, lateral rotation when limb isn’t fixed, medial rotation of hip when limb is fixed
In: Obturator nerve

Question 6

Adductor magnus* OIFIn

Answer 6

O: External and inferior surface of ischial ramus and lateral surface of ischial tuberosity
I: Length of linea aspera and proximal portion of medial supracondylar line, adductor tubercle of femur
F: Adduction and extension of hip, laterally rotates hip when limb isn’t fixed, medially rotates hip when limb is fixed
In: Obturator nerve and tibial nerve

Question 7

Gracillis OIFIn

Answer 7

O: Lower 1/2 of body of pubis, inferior ramus of pubis and part of ischial ramus
I: Anteromedial surface of proximal tibia below medial condyle, fascia of leg, proximal to semitendinosus and behind sartorius
F: Flexion of knee and rotates knee medially, adduction of hip
In: Obturator nerve

Question 8

• What makes the adductors so special?

Answer 8

Because of the oblique course of these muscles across the hip joint, from an anterior origin to a posterior insertion, they have two functions depending on the status of the limb. When the foot is raised off the ground, they laterally rotate the limb at the hip joint by moving the femur, and when the food is anchored on the ground, they medially rotate the hip joint by moving the trunk