Lecture 7 - Medial compartment of the thigh

Question 1

Medial muscles of the thigh

Answer 1

Hip adductors
Innervated by the obturator nerve (l2- L4)
Obturator artery

Gracilis 
Obturator externus
Adductor brevis 
Adductor longus 
Adductor magnus

Question 2

Adductor magnus origin, insertion, action and innervation

Answer 2

Adductor and hamstring component

Origin:
Adductor aspect- inferior pubic ramus and the ischium
Hamstring aspect - ischial tuberosity

Insertion:
Adductor aspect- Linear aspera of the femur
Hamstring aspect- adductor tubercle and medial supracondylar line of the femur

Insertions separated by the adductor hiatus - space where the femoral vessels pass through

Action:
Adduction of thigh at the hip
Flexion of thigh at hip - adductor aspect
Extension of thigh at hip - hamstring component

Innervation:
obturator nerve (L2-L4) - adductor component
tibial aspect of the sciatic nerve (L2-L3) - hamstring component

Question 3

Adductor hiatus

Answer 3

Space between the two insertions of the adductor magnus where the femoral vessels pass through Forms

Question 4

Adductor longus origin, insertion, action and innervation

Answer 4

Forms the medial border of the femoral triangle
Fan shape

Origin: pubic body

Insertion: Middle third of the linear aspera of the femur

Action: Adduction of thigh at hip

Innervation: Obturator nerve (L2-L4)

Question 5

Adductor brevisorigin, insertion, action and innervation

Answer 5

Short
Deep to adductor longus
Between the anterior and posterior divisions of the obturator nerve

Origin: Pubic body and inferior pubic ramus

Insertion: Linear aspera proximal to the adductor longus

Action: Adduct the thigh at hip

Innervation: Obturator nerve (L2-L4)

Question 6

Gracilis origin, insertion, action and innervation

Answer 6

Most superficial and medial muscles

Origin: Pubic body and inferior pubic ramus

Insertion: Pes anserinus between the insertions of the semitendinosus and sartorius (medial proximal tibia)

Action:
Adducts the thigh at the hip
Flexes the leg at the knee

Innervation: Obturator nerve (L2-L4)

Question 7

Obturator externa

Answer 7

Origin: External surface of the obturator membrane and adjacent bone

Passes posterior to the femoral neck

Insertion: Posterir aspect of the greater trochanter below the insertion of the inferior gemulls

Action:
Adduct the thigh at the hip
Lateral rotation of the thigh

Innervation: Obturator nerve (L2-L4)