Thigh (Anterior) Flashcards
The four headed muscle of the anterior compartment of thigh?
Quadriceps femoris
Difference between quadratus femoris and quadriceps femoris?
Quadratus femoris - in the hip
Quadriceps femoris - in the thigh
Name muscles of anterior compartment of thigh?
1.Sartorius
2.Iliacus
3.Psoas
4.Pectineus
5.Quadriceps femoris
•Rectus femoris
•Vastus lateralis
•Vastus medialis
•Vastus intermedius
How many compartments of thigh? Name
Anterior - extensor
Medial - adductor
Posterior - flexor
Anterior compartment of thigh is innervated by?
Femoral nerve
What are the iliopsoas muscles?
Iliacus and psoas are collectively known as iliopsoas muscles
Origin and insertion of iliacus muscle?
origin
Iliac fossa of hip bone
Insertion
With psoas on lesser trochanter of femur
Psoas major origin and insertion?
origin
12th thoracic vertebrae (T12)
5 lumber vertebrae (L1 - L5)
Insertion
With iliacus on lesser trochanter of femur
The most superficial muscle on anterior compartment of thigh is?
Sartorius
Origin and insertion of rectus femoris?
origin
Straight head - anterior inferior iliac spine
Reflected head - ileum above the acetabulum
Insertion
Quadriceps tendon into patella
Rectus femoris along with vastus muscles inserts into?
Patella via quadriceps tendon
Patella is attached to tibia by?
Patellar ligament
Why only rectus femoris can flex the thigh at hip joint and other vastus muscles of quadriceps femoris can’t flex it?
Because rectus femoris originates on the pelvis (hip bone). It also extends the leg at knee joint.
But vastus muscles originate on the femur
Orgin and insertion of vastus muscles?
Upper end and shaft of femur
Vastus medialis
Vastus lateralis
Shaft of femur
Vastus intermedius
Common Action of all vastus muscles?
Extend the leg at knee joint
Origin and insertion of sartorius muscle?
origin
Anterior superior iliac spine
Insertion
Upper medial surface of shaft of the tibia
Which is the Longest muscle of the body?
Sartorius
Innervation of psoas muscle?
Lumbar plexus
All muscles of anterior compartment of thigh are innervated by femoral nerve except?
Psoas - lumbar plexus
Origin and insertion of pectineus?
origin
Superior ramus of the pubis
Insertion
Pectineal line on Upper end of shaft of femur
The muscles of anterior compartment of thigh that originate and insert into femur?
originate
Vastus lateralis (upper end and shaft of femur)
Vastus medialis(upper end and shaft of femur)
Vastus intermedius (shaft of femur)
Insert
Pectineus - (upper end and shaft of femur)
Psoas - (lesser trochanter of femur)
Iliacus - (lesser trochanter of femur)
Action of pectineus?
Flexes and adducts the thigh at hipjoint
Which muscles of the anterior compartment are flexors and which are extensors?
flex
Sartorius
Iliacus
Psoas
Pectineus
(Rectus femoris)
Extend
Quadriceps femoris
(Rectus femoris)
Vastus lateralis
Vastus Medialis
Vastus Intermedius
Action of sartorius?
Flexes abducts and laterally rotates the thigh at hip joint
Flexes and medially rotates the leg at the knee
Sartorius _________ rotates the thigh and _________ rotates the leg?
Laterally rotates —- thigh
Medially rotates —– leg
Difference in action of pectineus and sartorius?
Sartorius - abducts
Pectineus - adducts
Which artery supplies the anterior compartment of the thigh?
Femoral artery
Iliopsoas muscle pass under _____ ligament to enter anterior compartment of thigh?
Inguinal ligament
The only muscle of quadriceps group that crosses both the hip and knee joint?
Rectus femoris
Difference in origin of sartorius and rectus femoris?
sartorius
Anterior superior iliac spine
Rectus femoris
Anterior inferior iliac spine
Shape of pectineus?
Flat quadrangular
Which muscle contribute to floor of femoral triangle?
Pectineus
Pectineus inserts into which part of femur?
Pectineal line on the posterior aspect of femur immediately inferior to lesser trochanter
Which vastus muscle extends farther distally ?
Vastus medialis extends farther distally than vastus lateralis
Which muscle is the first to atrophy in knee joint disease and the last one to recover?
Vastus medialis
is the first part of quadriceps muscle to atrophy in knee joint disease and the last to recover
What causes rectus femoris rupture? What happens
Sudden violent extension movement of knee joint
Muscle belly retracts proximally
Gap on anterior surface of thigh
What causes ligamentum patella rupture?
Sudden flexing force
When quadriceps femoris is actively contracting
Difference in rectus femoris rupture and ligamentum patallae rupture?
rectus femoris
Violent extension of knee joint
Ligamentum patallae rupture
Sudden flexing force to knee joint
