Hip Joint and Posterior Thigh Flashcards
What does the sciatic nerve supply (L4-S3)?
Supplies muscles in the posterior compartment of the thigh via its tibial branch (except biceps femoris)
Where do the branches of the sciatic nerve supply?
The muscles within all the compartment of the leg and intrinsic muscles of the foot
Where does the sciatic nerve divide into the tibial nerve and common fibular nerve?
Anywhere between the gluteal region and the popliteal fossa (most commonly inferior 1/3 of thigh)
Where do the hamstring muscles attach proximally?
Three of the four muscles attach to the ischial tuberosity
What muscles make up the hamstrings?
Semimembranosus and semitendinosus medially, the long and short heads of the biceps femoris laterally
Where do the hamstrings span, and what actions do they perform?
As a unit span the hip and knee joints, extend the hip and flex the knee
Where do the tendons of the hamstring attach?
The popliteal fossa superomedially and superolaterally (can be palpated on examination)
Where does the biceps femoris attach?
The lateral aspect of the head of the fibula
Why can the short head of the biceps femoris not be considered a “true” hamstring?
Attaches proximally to the linea aspera of the femur (instead of the ischial tuberosity)
Doesn’t cross the hip and therefore doesn’t contribute to the movement of the hip joint
Supplied the common fibular branch of the sciatic nerve (rather than the tibial branch)
Where do the semimembranosus and semitendinosus attach?
To the proximal tibia
How does the semitendinosus get its name?
It has a longer tendon than the other muscles
How does the semimembranosus get its name?
Has a shiny membranous appearance
What increases the depth of the acetabulum?
The acetabular labrum
What is ruptured during a hip dislocation?
The ligament of the head of the femur
What are some features of the artery to the head of the femur?
Provides only very minimal supply of oxygenated blood to the head of the femur, usually becomes obliterated in the adult
