Muscles Of The Medial Compartment Of The Thigh

Question 1

What are the 5 muscles found in the medial compartment of the thigh? What are the common called as a group?

Answer 1

Hip adductors

Gracilis, obturator externus, adductor brevis , adductor longus and adductor magnus

Question 2

What nerve innervates the medial muscles of the thigh? Where does this nerve arise?

Answer 2

Obturator nerve

Arises from the lumbar plexus

Question 3

What artery supplies the medial compartment of the thigh?

Answer 3

Obturator artery

Question 4

Where is the adductor magnus muscle found in the thigh?

Answer 4

Medial compartment

Most posteriorly (largest of all hence the name)

Question 5

How is the adductor magnus muscle of the thigh often divided?

Answer 5

Into the adductor art and the hamstring part

Question 6

What are the attachments of the adductor magnus muscle of the thigh?

Answer 6

Adductor part; originates from the inferior rami of the pubis and the rami of the ischium
Attaches to the linea aspera of the femur

Hamstring part; originates from the ischia tuberosity and attaches to the adductor tubercle and medial supercondylar line of the femur

Question 7

What is the action of the adductor magnus muscle of the thigh?

Answer 7

Adduct the thigh.

Adductor component also flexes the thigh with the hamstring portion extending the thigh

Question 8

What nerve innervates the adductor magnus muscle of the thigh?

Answer 8

Adductor part- obturator nerve (L2-4)

Hamstring part- tibial nerve (L4-S3)

Question 9

Where is the adductor longus found in the thigh?

What is its relationship with the femoral triangle?

Answer 9

Medial compartment

Large flat muscle.
Partially covering the adductor brevis and magnus

Forms the medial border of the femoral triangle

Question 10

What are the attachments of the adductor longus muscle of the thigh?

Answer 10

Originates from the pubis and expands into a fan shape, attaching broadly to the linea aspera of the femur.

Question 11

What is the action of the adductor longus muscle of the thigh?

Answer 11

Adduction and medial rotation of the thigh

Question 12

What nerve innervates the adductor longus muscle of the thigh?

Answer 12

Obturator nerve (L2-L4)

Question 13

What and where is the adductor brevis muscle of the thigh?

Answer 13

Short muscle lying underneath the adductor longus.

Lies between the anterior and posterior divisions of the obturator nerve. Therefore it can be used as an anatomical landmark to identify the aforementioned branches.

Question 14

What are the attachements of the adductor brevis muscle of the thigh?

Answer 14

Originates from the body of pubis and inferior pubic rami.

Attaches to the linea aspera of the femur, proximal to the adductor longus

Question 15

What is the action of the adductor brevis muscle of the thigh?

Answer 15

Adduction of the thigh

Question 16

What nerve innervates the adductor brevis muscle of the thigh?

Answer 16

Obturator nerve (L2-L4)

Question 17

What and where is the obturator externus muscle of the thigh?

Answer 17

Medial compartment
Located most superiorly

One of the smaller muscles of the medial thigh

Question 18

What are the attachments for the obturator externus muscle of the thigh?

Answer 18

Originates from the membrane of the obturator foramen and adjacent bone

It passes under the neck of the femur and attaches to the posterior aspect of the greater trochanter.

Question 19

What is the action of the obturator externus muscle of the thigh?

Answer 19

Laterally rotates the thigh

Question 20

What nerve innervates the obturator externus muscle of th thigh?

Answer 20

Obturator nerve (L2-L4)

Question 21

What and where is the gracilis muscle of the thigh?

Answer 21

In the medial compartment of the thigh

Most superficial and medial muscle in this compartment

Crosses both the hip and knee joint

can be transplanted into the hand or forearm to replace a damaged muscle

Question 22

What are the attachments of the gracilis muscle of the thigh?

Answer 22

Originates from the inferior rami of the pubis and the body of the pubis

Descends vertically down the leg and attaches to the medial surface of the tibia (between the tendons of the sartorius and the semitendinosus)

Question 23

What is the action of the gracilis muscle of the thigh?

Answer 23

Adduction of the thigh at hip and flexion of the leg at knee

Question 24

What nerve innervates the gracilis muscle of the thigh?

Answer 24

Obturator nerve (L2-L4)

Question 25

What muscles are affected when someone has strained their groin?

Answer 25

Adductor muscles

Proximal part of muscle most commonly affected, tearing near their bony attachments in the pelvis

Question 26

How do groin injuries commonly occur? What is the treatment?

Answer 26

Sports requiring explosive movements or extreme stretching.

RICE protocol

Question 27

Which muscle in the medial compartment of the thigh is the most superior?

Answer 27

Obturator externus

Question 28

Which two nerve innervate the adductor magnus muscle of the thigh?

Answer 28

Tibial (hamstring part) and obturator (adductor part)