ant thigh code Flashcards
What is the function of the muscles in the anterior compartment of the thigh?
These muscles primarily act to extend the lower limb at the knee joint.
Which nerve innervates the muscles of the anterior compartment of the thigh?
The femoral nerve (L2-L4) innervates these muscles.
What artery supplies the muscles of the anterior compartment of the thigh?
The femoral artery provides the arterial supply.
Which muscles make up the iliopsoas?
The iliopsoas consists of the psoas major and iliacus.
Where do the iliopsoas muscles originate and insert?
The psoas major originates from the lumbar vertebrae, and the iliacus from the iliac fossa. Both insert onto the lesser trochanter of the femur.
What is the action of the iliopsoas muscles?
The iliopsoas muscles flex the thigh at the hip joint.
How is the iliopsoas innervated?
The psoas major is innervated by anterior rami of L1-3, while the iliacus is innervated by the femoral nerve.
How many muscles are in the quadriceps femoris group?
The quadriceps femoris group consists of four muscles: vastus lateralis, vastus intermedius, vastus medialis, and rectus femoris.
Where does the quadriceps femoris group insert?
The quadriceps femoris group inserts onto the patella via the quadriceps tendon.
What is the action of the quadriceps femoris group?
The quadriceps femoris group extends the knee joint and also stabilizes the patella.
What is the origin of the vastus lateralis muscle?
The vastus lateralis originates from the greater trochanter and the lateral lip of the linea aspera of the femur.
What is the origin of the vastus intermedius muscle?
The vastus intermedius originates from the anterior and lateral surfaces of the femoral shaft.
What is the origin of the vastus medialis muscle?
The vastus medialis originates from the intertrochanteric line and the medial lip of the linea aspera of the femur.
Where does the rectus femoris originate?
The rectus femoris originates from the anterior inferior iliac spine and the ilium of the pelvis.
What is the action of the rectus femoris?
The rectus femoris extends the knee and flexes the hip (the only quadriceps muscle that crosses both joints).
Where does the sartorius muscle originate and insert?
The sartorius originates from the anterior superior iliac spine and inserts on the superior, medial surface of the tibia.
What actions does the sartorius muscle perform?
The sartorius flexes, abducts, and laterally rotates the hip joint and flexes the knee joint.
Where does the pectineus muscle originate and insert?
The pectineus originates from the pectineal line of the pubis and inserts onto the pectineal line of the femur.
What is the action of the pectineus muscle?
The pectineus performs adduction and flexion at the hip joint.
Which nerves innervate the pectineus muscle?
The pectineus is innervated by the femoral nerve and may also receive a branch from the obturator nerve.
What test is used to assess the femoral nerve using the quadriceps femoris?
To test the femoral nerve, a patient is asked to extend the knee against resistance. Absence of contraction indicates nerve damage.
