Anatomy Flashcards
(21 cards)
What is the origin of the Sartorius muscle?
Anterior superior iliac spine
The Sartorius muscle is a long, thin muscle that runs down the length of the thigh.
Where does the Sartorius muscle insert?
Upper part of medial surface of tibia (in front of insertion of gracilis & semitendinosus) (S.G.S)
This positioning allows for its role in leg movement.
What are the actions of the Sartorius muscle?
- Flexion, abduction and lateral rotation of the thigh at the hip joint
- Flexion and medial rotation of the leg at the knee joint
- Steady the pelvis on the femur (together with guy rope muscles)
These actions make the Sartorius versatile in movement.
What is the primary action of the Quadriceps Femoris muscle?
Powerful extension of the knee joint
The Quadriceps Femoris is a group of muscles crucial for knee extension.
What is the origin of the Rectus Femoris muscle?
- Straight head: From anterior inferior iliac spine
- Reflected head: From depression above acetabulum
The Rectus Femoris is one of the four muscles in the Quadriceps Femoris group.
List the origins of the Vastus Lateralis muscle.
- Upper part of intertrochanteric line
- Root of greater trochanter
- Lateral lip of gluteal tuberosity
- Lateral lip of linea aspera (upper ½)
The Vastus Lateralis contributes to knee extension.
What is the origin of the Vastus Medialis muscle?
- Lower part of intertrochanteric line
- Spiral line
- Medial lip of linea aspera
- Medial supracondylar line (upper ½)
This muscle helps stabilize the patella.
Where does the Vastus Intermedius muscle originate?
Upper 2/3 of the anterior and lateral surfaces of the femur
It lies deep to the Rectus Femoris.
What is the insertion point of the Articularis genus?
Upper part of the synovial membrane of the knee joint
This muscle plays a role in protecting the knee joint during movement.
What is the nerve supply for the Quadriceps Femoris?
Femoral Nerve
This nerve is responsible for the motor supply to the Quadriceps group.
What are the actions of the Pectineus muscle?
Adduction and flexion of the thigh at the hip joint
It also assists in stabilizing the pelvis.
What is the origin of the Gracilis muscle?
The body of the pubis
The Gracilis is involved in flexion and medial rotation of the leg.
Where does the Adductor Longus muscle insert?
In the middle 2/4 of linea aspera of the femur
It plays a role in thigh adduction.
What is the nerve supply for the Adductor Magnus muscle?
Sciatic nerve
This muscle is responsible for the extension of the hip joint.
What actions does the Tensor Fascia Lata muscle perform?
It tightens the ilio-tibial tract to assist in keeping the knee extended in standing and walking
This muscle is important for stability during movement.
Where does the Gluteus Maximus muscle originate?
- Gluteal surface of the ilium, behind the posterior gluteal line
- Posterior surface of sacrum and coccyx
- Back of the sacro-tuberous ligament
This muscle is the main extensor of the hip joint.
What is the insertion point of the Gluteus Medius muscle?
Oblique ridge on the lateral surface of the greater trochanter
It plays a key role in hip abduction.
What is the origin of the Piriformis muscle?
Front middle three sacral vertebrae in the pelvis
This muscle is involved in lateral rotation of the thigh.
What is the nerve supply for the Obturator Internus muscle?
Nerve to Obturator Internus
This nerve facilitates the motion of the Obturator Internus.
What is the action of the Quadratus Femoris muscle?
Lateral rotation of the thigh at the hip joint
This muscle is crucial for external rotation.
Where does the Obturator Externus muscle insert?
Quadrate tubercle
It plays a role in lateral rotation of the thigh.
