Posterior Thigh and Popliteal Fossa Flashcards
(28 cards)
What muscles does the hamstring contain?
Semimembranosus, semitenindosus, biceps femoral
What group of muscles lie in the posterior thigh?
The hamstrings
What is the common proximal attachment of the semitenindosus, semimembranosus and the long head of biceps femoris?
Ischial tuberosity
What is the innervation of semimembranosus?
Tibal nerve L5-S2
What is the innervation of semitendonosus?
Tibial nerve l5-s2
What is the innervation of the long head of biceps femoris?
Tibial never L5-S2
Where does the long head of biceps femoris insert?
Head of fibula
What are the three insertions of semimembranosus?
Medial tibial condyle
Oblique popliteal ligament
Popliteus fascia
Where does semitenindosus insert?
Just medial to tibial tuberosity
What is the origin of the short head of biceps femoris?
Lateral lip of the linea aspera in the middle third of the femur
What is the insertion of the short head of biceps femoris?
Head of fibula
What is the innervation of the short head of biceps femoris?
Common fibular nerve L5-S2
What are two functions of the hamstrings at the hip?
Extend hip
Stabilise pelvis in Sagittal plane
What are the combine actions of the hamstrings at the knee?
Flexion
External rotation
Internal rotation
What are the functions of biceps femoris at the knee?
Flexion and external rotation
What are the functions of semimenbranosus and semitenindosus?
Flexion at knee
Internal rotation at knee
Extension at hip
Stabilises pelvis in Sagittal plane
Which muscle of the medial compartment is also considered to be part of the hamstring?
Hamstring part of adductor Magnus
What is the nerve supply of the adductor part of adductor Magnus?
Obturator nerve L2 L3 L4
What is the proximal attachment of the adductor part of adductor Magnus
Ishciopubic ramus
What is the nerve supply of the hamstring part of adductor Magnus?
Tibial nerve L2 L3 L4
What is the proximal attachment of the hamstring part of the adductor Magnus?
Ischial tuberosity
Why is the hamstring part of the adductor Magnus considered part of the hamstrings?
Shares common nerve supple and proximal attachment:
Tibial nerve and Ischial tuberosity
What two nerves does the sciatic nerve split into?
Common fibular (peroneal) and tibial
Which four muscles form the borders of the popliteal Fossa?
Biceps femoris
Semitenindosus
Semimembranosus
Two heads of gastrocnemius