Anterior Thigh Muscles Flashcards Preview

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Flashcards in Anterior Thigh Muscles Deck (43):
1

What can the musculature of the thigh be split into?

Anterior, medial and posterior

2

What does each compartment of the thigh have?

Distinct innervation and function

3

What are the muscles in the anterior compartment of the thigh innervated by?

The femoral nerve (L2-L4)

4

As a general rule, what do the muscles of the anterior thigh do?

Extend the leg at the knee joint

5

What muscles are in the anterior thigh?

Pectineus 
Sartorius 
Quadriceps femoris 
The end of the iliopsoas muscle passes into the anterior compartment

6

What is the iliopsoas muscle made up of?

Two muscles, the psoas major and the iliacus

7

Why is the iliopsoas commonly referred to as one muscle

Although they originate in different areas, but come together to form a tendon

8

How is the iliopsoas unlike many of the other anterior thigh muscles?

It doesn’t extend the leg at the knee joint

9

What is the proximal attachment of the psoas major?

Sides of T12-L5 vertebrae and discs between them
Transverse processes of all lumbar vertebrae

10

What is the proximal attachment of the iliacus?

Iliac crest, iliac fossa, ala of sacrum, anterior sacro-iliac ligaments

11

What is the distal attachment of the psoas major?

Lesser trochanter of femur

12

What is the distal attachment of the iliacus?

Tendon of psoas major, lesser trochanter and femur distal to it

13

What is the innervation of the psoas major?

Anterior rami of lumbar nerves (L1, L2, L3)

14

What is the innervation of the iliacus?

Femoral nerve (L2, L3)

15

What is the arterial supply to the psoas major?

Lumbar arteries

16

What is the arterial supply of the iliacus?

Branches of the medial circumflex femoral artery

17

What is the main action of the iliopsoas?

Flexes the thigh at the hip joint
Stabilising joint

18

What muscle assist in the action of the iliopsoas?

Psoas minor

19

What is the proximal attachment of the psoas minor?

Sides of T12-L1 vertebrae and intervertebral discs

20

What is the distal attachment of the psoas minor?

Pectineal line, iliopectineal eminence via iliopubic arch

21

What is the innervation of the psoas minor?

Anterior rami of lumbar nerves (L1, L2)

22

What is the arterial supply of the psoas minor?

Lumbar arteries

23

What does the quadriceps femoris consist of?

Four individual muscles- the three vastus muscles, and the rectus femoris

24

What is the proximal attachment of the rectus femoris?

Anterior inferior iliac spine and ilium superior to the acetabulum

25

What is the proximal attachment to the vastus lateralis?

Greater trochanter and lateral lip of linea aspera of femur

26

What is the proximal attachment of the vastus medialis?

Intertrochanteric line and medial lip of the linear aspera of femur

27

What is the proximal attachment of the vastus intermedius?

Anterior and lateral surfaces of shaft of femur

28

What is the distal attachment of the quadriceps femoris?

Via common tendinous (quadriceps tendon) and independent attachments to the base of the patella 
Indirectly via the patellar ligament to the tibial tuberosity 
Medial and lateral vasti also attach to tibia and patella via aponeuroses (medial and lateral patellar retinacula)

29

What is the innervation of the quadriceps femoris?

Femoral nerve (L2, L3, L4)

30

What is the main action of the quadriceps femoris?

Extend leg at knee joint

31

What does the rectus femoris do?

Steadies the hip joint and helps iliopsoas flex thigh

32

Where does the sartorius run?

Across the thigh in a inferomedial direction

33

Where is the sartorius positioned?

More superficially that the other muscles in the leg

34

What is the proximal attachment of the sartorius?

Anterior superior iliac spine and superior part of notch inferior to it

35

What is the distal attachment of the sartorius?

Superior part of the medial surface of tibia

36

What is the innervation of the sartorius?

Femoral nerve (L2, L3)

37

What is the arterial supply of the sartorius?

Branches of the medial circumflex femoral artery

38

What is the main action of the sartorius?

Flexes, abducts, and laterally rotates the thigh at the hip joint 
Flexes leg at knee joint (medially rotating leg when knee is flexed)

39

What is the pectineus?

A flat muscle that forms the base of the femoral triangle

40

What can the pectineus be considered as?

A transitional muscle between the anterior thigh and medial thigh compartments

41

Why can the pectineus be considered as a transitional muscle?

Because it has dual innervation

42

What can be tested in suspected femoral nerve damage?

The quadriceps femoris

43

How are the quadriceps femoris muscles be tested?

The patient lies supine, with the knee slightly flexed. The patient is asked to extend the leg against resistance. The contraction of the quadriceps femoris should be visible