1.2.6.2. Muscles of the Medial Compartment of the Thigh Flashcards
What are the Muscles of the Medial Compartment of the Thigh, collectively known as?
The Hip Adductors
How many Muscles are in the Medial Compartment of the Thigh?
5
What are the Muscles of the Medial Compartment of the Thigh?
- Adductor Magnus Muscle
- Adductor Longus Muscle
- Adductor Brevis Muscle
- Obturator Externus Muscle
- Gracilis Muscle
What are the Muscles of the Medial Compartment of the Thigh innervated by?
The Obturator Nerve
Where does the Obturator Nerve arise from?
The Lumbar Plexus
What is the Arterial supply of the Muscles of the Medial Compartment of the Thigh?
The Obturator Artery
What is the largest Muscle in the Medial Compartment of the Thigh?
The Adductor Magnus Muscle
Where does the Adductor Magnus Muscle lie, in relation to the other Muscles of the Medial Compartment of the Thigh?
It lies Posteriorly
What 2 parts is the Adductor Magnus Muscle divided into?
- The Adductor part of the Adductor Magnus Muscle
2. The Hamstring part of the Adductor Magnus Muscle
Where does the Adductor Part of the Adductor Magnus Muscle originate from?
- Inferior Rami of the Pubis
2. Rami of the Ischium
Where does the Adductor Part of the Adductor Magnus Muscle attach distally??
Linea Aspera of the Femur
Where does the Hamstring Part of the Adductor Magnus Muscle originate from?
Ischial tuberosity
Where does the Hamstring Part of the Adductor Magnus Muscle attach distally?
- Adductor Tubercle of the Femur
2. Medial Supracondylar Line of the Femur
What is the function of the Adductor Part of the Adductor Magnus Muscle?
- Adduction of the Hip Joint
2. Flexion of the Hip Joint
What is the function of the Hamstring Part of the Adductor Magnus Muscle?
- Adduction of the Hip Joint
2. Extension of the Hip Joint
What is the innervation of the Adductor Part of the Adductor Magnus Muscle?
The Obturator Nerve (L2-L4)
What is the innervation of the Hamstring Part of the Adductor Magnus Muscle?
The Tibial Nerve (L4-S3)
How is the Adductor Longus Muscle described?
As a long, flat Muscle
What does the Adductor Longus Muscle cover?
- The Adductor Brevis Muscle
2. The Adductor Magnus Muscle (partially)
What does the Adductor Longus Muscle form?
The Medial Border of the Femoral Triangle
Where does the Adductor Longus Muscle originate from?
The Pubis
What happens to the Adductor Longus Muscle as it travels?
It expands into a fan-shape
Where does the Adductor Longus Muscle attach distally?
Broadly along the Linea Aspera of the Femur
What is the function of the Adductor Longus Muscle?
- Adduction of the Hip Joint
2. Medial Rotation of the Hip Joint
What is the innervation of the Adductor Longus Muscle?
The Obturator Nerve (L2-L4)
How is the Adductor Brevis Muscle described?
A Short Muscle
Where is the Adductor Brevis Muscle located?
Underneath the Adductor Longus Muscle
- What does the Adductor Brevis Muscle lie between?
2. What is the significance of this?
- a) The Anterior Division of the Obturator Nerve
- b) The Posterior Division of the Obturator Nerve
- It can be used as an anatomical landmark to identify the branches above
Where does the Adductor Brevis Muscle originate from?
- Body of the Pubis
2. Inferior Pubic Rami
Where does the Adductor Brevis Muscle attach distally?
Linea Aspera of the Femur
Note - it attaches Proximally to the distal attachment of the Adductor Longus Muscle
What is the function of the Adductor Brevis Muscle?
Adduction of the Hip Joint
What is the innervation of the Adductor Brevis Muscle?
The Obturator Nerve (L2-L4)
How large is the Obturator Externus Muscle, in relation to the other Muscles of the Medial Compartment of the Thigh?
It is one of the smaller Muscles of the Medial Compartment of the Thigh
Where is the Obturator Externus Muscle located, in relation to the other Muscles of the Medial Compartment of the Thigh?
It is located most superiorly
Where does the Obturator Externus Muscle originate from?
Membrane of the Obturator Foramen, and adjacent Bone
Where does the Obturator Externus Muscle travel?
Under the Neck of the Femur
Where does the Obturator Externus Muscle attach distally?
Posterior Aspect of the Greater Trochanter
What is the function of the Obturator Externus Muscle?
Lateral Rotation of the Hip Joint
What is the innervation of the Obturator Externus Muscle?
The Obturator Nerve (L2-L4)
What is the most Superficial Muscle in the Medial Compartment of the Thigh?
The Gracilis Muscle
What Joints does the Gracilis Muscle cross?
- The Hip Joint
2. The Knee Joint
Where does the Gracilis Muscle originate from?
- Inferior Rami of the Pubis
2. Body of the Pubis
How does the Gracilis Muscle descend down the Leg?
Almost Vertically
Where does the Gracilis Muscle attach distally?
Medial Surface of the Tibia
What does the Gracilis Muscle attach distally between?
- Anteriorly - The Tendon of the Sartorius Muscle
2. Posteriorly - The Tendon of the Semitendinosus Muscle
What is the function of the Gracilis Muscle?
- Adduction of the Hip Joint
2. Flexion of the Knee Joint
What is the innervation of the Gracilis Muscle?
The Obturator Nerve (L2-L4)
What is the Clinical Significance of the Gracilis Muscle?
It is sometimes transplanted into the Hand / Forearm to replace damaged Muscle
