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ESA 2 > MSK - Muscles in the Anterior Compartment of the Thigh > Flashcards

MSK - Muscles in the Anterior Compartment of the Thigh Flashcards

1
Q

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

A

The Femoral Nerve

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2
Q

Generally what action do the anterior thigh muscles perform?

A

Extend the leg at the knee joint

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3
Q

What are the three major muscles in the anterior compartment?

What other major muscle passes through the anterior muscle?

A

Pectineus, Sartorius, Quadriceps Femoris

he end of the Iliopsoas muscle passes through

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4
Q

What two muscles make up the Iliopsoas?

Why are they referred to as one muscle?

A

The psoas major and the iliacus

They originate in different areas but come together to form a tendon

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5
Q

What are the attachments of the Iliopsoas?

A

Psoas major originates from the lumbar vertebrae

Iliacus originates from the iliac fossa of the pelvis

They insert together onto the lesser trochanter of the femur

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6
Q

What are the actions of the Iliopsoas?

A

Unlike many of the anterior thigh muscles, the iliopsoas does not extend the leg at the knee joint

The iliopsoas flexes the lower limb at the hip joint and assists in lateral rotation at the hip joint

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7
Q

What is the innervation of the Iliopsoas?

A

The psoas major is innervated by anterior rami of L1-3, while the iliacus is innervated by the femoral nerve

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8
Q

What muscles does the Quadriceps Femoris muscle consist of?

A

Three **vastus **muscles and the rectus femoris

They form the main bulk of the thigh and collectively are one of the most powerful muscles in the body

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9
Q

Where does the Quadriceps Femoris attach?

A

Attaches to the patella via a tendon

The patella attahes to the tibia by the patella tendon

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10
Q

What is the action of the Quadriceps Femoris?

A

Main extensor of the knee

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11
Q

What are the three vastus muscles?

A

Vastus medialis

Vastus intermedius

Vastus lateralis

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12
Q

Collectively, what is the action of the vastus muscles?

A

Extend the knee joint

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13
Q

Collectively, what are the vastus muscles innervated by?

A

Innervated by the femoral nerve

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14
Q

What are the attachments of the Rectus Femoris?

A

Originates from the ilium, just superior to the acetabulum

It runs straight down the leg (the latin for straight is rectus)

Attaches to the patella by the quadriceps femoris tendon

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15
Q

What are the actions of the Rectus Femoris?

A

This is the only muscle of the quadriceps to cross both the hip and knee joints

It flexes the leg at the hip joint

Extends at the knee joint

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16
Q

What is the Rectus Femoris innervated by?

A

The Femoral Nerve

17
Q

Describe the Sartorius

A

Longest muscle in the body

Long and Thin

Runs across the thigh in an inferomedial direction

Found more superfiially than other leg muscles

18
Q

What are the attachments of the Sartorius?

A

Originates from the anterior superior iliac spine

Attaches to the superior medial surface of the tibia

19
Q

What are the actions of the sartorius?

A

At the hip joint, it is a flexor, abductor and lateral rotator

At the knee joint, it is also a flexor

20
Q

What is the innervation of the Sartorius?

A

The Femoral Nerve

21
Q

Why could the Pectineus muscle be classified as either an anterior or medial compartment muscle?

A

Innervated by the femoral nerve which is characteristic of the anterior compartment

Actions are typical of the medial compartment

22
Q

What are the attachments of the pectineus?

A

It originates from the pectineal line on the anterior surface of the pelvis

Attaches to the pectineal line on the posterior side of the femur, just inferior to the lesser trochanter

23
Q

What are the actions of the Pectineus?

A

Adduction and flexion at the hip joint

24
Q

What is the innervation of the pectineus?

A

The Femoral Nerve

25
Q

What can be tested if femoral nerve damage is suspected?

A

The Quadriceps Femoris

26
Q

How can the quadriceps femoris be tested?

A

Asking the patient to lie in a supine position, with the knee slightly flexed

Ask the patient to extend the leg, and resist the movement – the contraction of the quadriceps femoris should be visible.

27
Q

What is the green highlighted muscle?

A

Light Green - Psoas Major

Dark Green - Iliacus

Overall - Iliopsoas

28
Q

What is the muscle highlighted in yellow?

A

Rectus Femoris

29
Q

What is the muscle highlighted in red?

A

Vastus Medialis

30
Q

What is the muscle highlighted in blue?

A

Vastus Lateralis

31
Q

What is the muscle highlighted in purple?

A

Sartorius

32
Q

What is the muscle highlighted in orange?

A

Pectineus

ESA 2 (33 decks)

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