MSK - Muscles of the Posterior Compartments of the Thigh Flashcards Preview

ESA 2 > MSK - Muscles of the Posterior Compartments of the Thigh > Flashcards

Flashcards in MSK - Muscles of the Posterior Compartments of the Thigh Deck (21)
Loading flashcards...
1
Q

What are the muscles in the posterior compartment of the thigh collectively known as?

A

Hamstrings

2
Q

What is the innvervation of the hamstrings?

A

The Sciatic Nerve

3
Q

What is the name of the muscle highlighted in red?

How many heads does it have?

A

Biceps Femoris

2

4
Q

Which side of the posterior knee can the short head of the Biceps Femoris be felt?

A

Lateral

5
Q

What are the attachments of the Biceps Femoris?

A

Long Head - Originates from the ischial tuberosity of the pelvis

Short Head - Originates from the linea aspera on posterior surface of the femur

**Together - **The heads form a tendon, which inserts into the head of the fibula

6
Q

What is the main action of the Biceps Femoris?

What else does the Biceps Femoris do?

A

Main - Flexion at the knee

Also extends the leg at the hip and laterally rotates the hip and the knee

7
Q

What is the innervation of the Biceps Femoris?

A

Sciatic Nerve

8
Q

What is the name of the muscle highlighted in blue?

A

Semitendinosus

9
Q

What are the attachments of the Semitendinosus?

A

It originates from the ischial tuberosity of the pelvis, and attaches to the medial surface of the tibia

10
Q

What are the actions of the Semitendinosus?

A

Flexion of the leg at the knee joint

Extension of thigh at the hip

Medially rotates the thigh at the hip join and the leg at the knee joint

11
Q

What is the innervation of the Semitendinosus?

A

Sciatic Nerve

12
Q

What is the name of the muscle highlighted in yellow?

A

Semimembranous

13
Q

What are the attachments of the Semimembranosus?

A

It originates from the ischial tuberosity, but does so more superiorly than the semitendinosus and biceps femoris. It attaches to the medial tibial condyle

14
Q

What are the actions of the Semimembranosus?

A

Flexion of the leg at the knee joint

Extension of the thigh at the hip

Medially rotates the thigh at the hip joint and the leg at the knee joint

15
Q

What is the innervation of the Semimembranosus?

A

Sciatic Nerve

16
Q

What does a hamstring strain refer to?

How are they often injured?

A

**Excessive stretch **or **tearing **of the muscle fibres

During sports that involve kicking or running

17
Q

What is damage to the muscle fibers also likely to damage?

What would this produce?

How would it be contained?

A

Surrounding blood vessels

Produces a haematoma

Contained by overlyng fascia lata

18
Q

How should a hamstring muscle strain be treated?

A

RICE Protocol

Rest

Ice

Compression

Elevation

19
Q

What has happened here?

A

Avulsion Fracture of the Ischial Tuberosity

20
Q

What is an avulsion fracture?

A

When a fragments of bone breaks away from the main body of bone

21
Q

How does an avulsion fracture of the ischial tuberosity occur?

During what activities does an avulsion fracture usually occur?

A

Hamstring tendons “tear off” a piece of ischial tuberosity

During sports that require rapid contraction and relaxation of the muscles