1.2.6.3. Muscles of the Posterior Compartment of the Thigh Flashcards
What are the Muscles of the Posterior Compartment of the Thigh collectively known as?
The Hamstrings
How many Muscles are in the Posterior Compartment of the Thigh?
3
What are the Muscles of the Posterior Compartment of the Thigh?
- Biceps Femoris Muscle
- Semitendinosus Muscle
- Semimembranosus Muscle
What do the Muscles of the Posterior Compartment of the Thigh form, at the Knee Joint?
- Medial Tendon at the back of the Knee Joint
2. Lateral Tendon at the back of the Knee Joint
What is the general function of the Muscles of the Posterior Compartment of the Thigh?
- Extension of the Hip Joint
2. Flexion of the Hip Joint
What are the Muscles of the Posterior Compartment of the Thigh innervated by?
The Sciatic Nerve (L3-S4)
Is the Hamstring part of the Adductor Magnus Muscle located in the Posterior Compartment of the Thigh?
No, although it has a similar action to these Muscles, it is located in the Medial Compartment of the Thigh
How does the Biceps Femoris Muscle of the Thigh, compare to the Biceps Brachii Muscle of the Arm?
They both have 2 Heads
What are the 2 Heads of the Biceps Femoris Muscle?
- Long Head of the Biceps Femoris Muscle
2. Short Head of the Biceps Femoris Muscle
Where is the Biceps Femoris Muscle located, in relation to the other Muscles of the Posterior Compartment of the Thigh?
It is the Lateral-most
Where does the Long Head of the Biceps Femoris Muscle originate from?
Ischial Tuberosity of the Pelvis
Where does the Short Head of the Biceps Femoris Muscle originate from?
Linea Aspera of the Femur
Where does the common Tendon of the Biceps Femoris Muscle attach distally?
Head of the Fibula
Where can the common Tendon of the Biceps Femoris Muscle be felt?
Laterally in the Posterior Knee Joint
What is the function of the Biceps Femoris Muscle?
- Flexion at the Knee Joint
- Extension of the Hip Joint
- Lateral Rotation of the Hip Joint
- Lateral Rotation of the Knee Joint
What is the innervation of the Long Head of the Biceps Femoris Muscle?
Tibial Part of the Sciatic Nerve (L4-S3)
What is the innervation of the Short Head of the Biceps Femoris Muscle?
Common Fibular Part of the Sciatic Nerve (L4-S3)
How is the Semitendinosus Muscle described?
A largely Tendinous Muscle
Where is the Semitendinosus Muscle located, in relation to the Biceps Femoris Muscle?
It lies Medially to the Biceps Femoris Muscle
What is covered by the Semitendinosus Muscle?
The Semimembranosus Muscle
Where does the Semitendinosus Muscle originate from?
Ischial Tuberosity of the Pelvis
Where does the Semitendinosus Muscle attach distally?
Medial Surface of the Tibia
What is the function of the Semitendinosus Muscle?
- Flexion of the Knee Joint
- Extension of the Hip Joint
- Medial Rotation of the Hip Joint
- Medial Rotation of the Knee Joint
What is the innervation of the Semitendinosus Muscle?
Tibial Part of the Sciatic Nerve (L4-S3)
How is the Semimembranosus Muscle described?
A Flat and Broad Muscle
Where is the Semimembranosus Muscle located, in relation to the Semitendinosus Muscle?
It is Deep to the Semitendinosus Muscle (underneath it)
Where does the Semimembranosus Muscle originate from?
Ischial Tuberosity of the Pelvis
Where does the Semimembranosus Muscle originate from, in relation to the other Muscles of the Posterior Compartment of the Thigh?
Superior to where the Semitendinosus Muscle and Biceps Femoris Muscle originate from
Where does the Semimembranosus Muscle attach distally?
Medial Tibial Condyle
What is the function of the Semimembranosus Muscle?
- Flexion of the Knee Joint
- Extension of the Hip Joint
- Medial Rotation of the Hip Joint
- Medial Rotation of the Knee Joint
What is the innervation of the Semimembranosus Muscle?
Tibial Part of the Sciatic Nerve
