1.2.5.2. Muscles of Hip Joint Extension Flashcards
What movements can be carried out at the Hip Joint?
- Flexion
- Extension
- Abduction
- Adduction
- Lateral Rotation
- Medial Rotation
- Circumduction
What are the main Extensor Muscles of the Hip Joint?
- Gluteus Maximus Muscle
- Semimembranosus Muscle
- Semitendinosus Muscle
- Biceps Femoris Muscle
Where does the Gluteus Maximus Muscle originate from?
- Gluteal (Posterior) Surface of the Ilium
- Gluteal (Posterior) Surface of the Sacrum
- Gluteal (Posterior) Surface of the Coccyx
Where does the Gluteus Maximus Muscle travel?
At a 45 degree angle across the Buttocks
Where does the Gluteus Maximus Muscle attach distally?
- Iliotibial Tract
2. Gluteal Tuberosity of the Femur
What is the significance of the Gluteus Maximus Muscle?
- It is the largest of the Gluteal Muscles
2. It is the most Superficial of the Gluteal Muscles - forming the shape of the Buttocks
What is the function of the Gluteus Maximus Muscle?
- It is the main Extensor of the Hip Joint
- It assists in Lateral Rotation of the Hip Joint
Note - It is only used when force is required, e.g. running, climbing, squatting
What is the innervation of the Gluteus Maximus Muscle?
The Inferior Gluteal Nerve
Where is the Semimembranosus Muscle located, in relation to the Semitendinosus Muscle?
Deep
Where does the Semimembranosus Muscle originate from?
Ischial Tuberosity of the Pelvis, but more Superiorly than the Semitendinosus and Biceps Femoris Muscles
Where does the Semimembranosus Muscle attach distally?
Medial Tibial Condyle
What is the function of the Semimembranosus Muscle?
- Flexion of the Leg at the Knee Joint
- Extension of the Thigh at the Hip Joint
- Medial Rotation of the Thigh at the Hip Joint
- Medial Rotation of the Leg at the Knee Joint
What is the innervation of the Semimembranosus Muscle?
Tibial Part of the Sciatic Nerve
How is the Semimembranosus Muscle described?
It is Flat and Broad
How is the Semitendinosus Muscle described?
It is a largely Tendinous Muscle
Where is the Semitendinosus Muscle located, in relation to the Biceps Femoris?
Medially
What does the Semitendinosus Muscle cover?
The majority of 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 Leg at the Knee Joint
- Extension of the Thigh at the Hip Joint
- Medially Rotation of the Thigh at the Hip Joint
- Medially Rotation of the Leg at the Knee Joint
What is the innervation of the Semitendinosus Muscle?
Tibial Part of the Sciatic Nerve
- What is the Biceps Femoris Muscle similar to?
2. Why?
- Biceps Brachii in the Upper Arm
2. The Muscle has 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 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 on the Posterior Surface of the Femur
What do the Long and Short Heads of the Biceps Femoris Muscle form?
A single Tendon, the Tendon of the Biceps Femoris Muscle
Where does the Tendon of the Biceps Femoris Muscle attach distally?
Head of the Fibula
Where is the Biceps Femoris Muscle located?
It is the Lateral-Most Muscle in the Posterior Thigh
Where can the Tendon of the Biceps Femoris Muscle be felt?
Laterally at the Posterior Knee Joint
What is the function of the Biceps Femoris Muscle?
- Flexion of the Leg at the Knee Joint
- Extension of the Thigh at the Hip Joint
- Lateral Rotation of the Thigh at the Hip Joint
- Lateral Rotation of the Leg at the Knee Joint
Do both the Long and Short Heads of the Biceps Femoris Muscle have the same innervation?
No
What is the innervation of the Long Head of the Biceps Femoris Muscle?
Tibial Part of the Sciatic Nerve
What is the innervation of the Short Head of the Biceps Femoris Muscle?
Common Fibular Part of the Sciatic Nerve
