Posterior Thigh Flashcards
how many muscles in posterior thigh?
4
functions of hamstrings?
thigh extension, except for short head of biceps femurs; leg flexion (all four)
true hamstrings
act at both hip and knee
function of semitendinosus?
extend thigh; and flex leg (med. rotate)
innervation of semitendinosus?
tibial division of sciatic n.
semitendinosus attachments?
ischial tuberosity, medial surface of superior aspect of tibia
muscles that make up pea anserinus?
gracilis, semitendinosus, sartorius
function of semimembranosus?
extend thigh, flex leg
innervation of semimembranosus?
tibial division of sciatic n.
more biomechanically efficient pelvic/hip lever system male or female?
male
which small lateral hip rotators is least effective abductor when the thigh is flexed?
uh?
what is and where is articulates genu?
uh?
attachments of semimembranosus?
ischial tuberosity (flattened membranous proximal attachment), posterior part of medial condyle of tibia; part becomes oblique popliteal ligament (reinforces the intercondylar part of joint capsule)
biceps femurs long head function?
flex leg, extend thigh, tibial division of sciatic n.
short head of biceps femurs function?
only flexed leg
innervation of biceps femoris short head?
common fibular branch of the sciatic
popliteal artery terminates by dividing into?
anterior tibial artery and posterior tibial artery
the popliteal vein is formed by the union of what veins?
anterior and posterior tibial v.
where is the popliteal v normally found?
inferior border of popliteus muscle
where does the popliteal v become femoral v?
after transversing adductor hiatus
what nerve in popliteal fossa is most superficial (most likely injured in stab injury)?
tibial n.
what does the common fibular n. terminate into?
deep fibular n. and superficial fibular n.
where does the common fibular nerve run?
winds around head and neck of fibula; leaves popliteal fossa by passing superficial to lateral head of gastrocnemius; deep to fibularis longus
what cutaneous nerve does tibial n give off?
medial sural cutaneous
what cutaneous n does common fibular n. give off?
lateral sural cutaneous n.
what do the sural nerves supply?
distal posterior aspect of leg and lateral aspect of ankle and foot
lateral rotation of hip primary action for?
not tensor fascia kata or iliopsoas
the cruciate anastomosis receives blood from?
receives blood from first perforating a.
**KNOW*which is involved in arterial anastomosis around hip joint?
medial circumflex femoral a.
