hip joint and posterior thigh Flashcards
nerve to posterior thigh
sciatic via tibial branch
nerve to intrinsic muscles of foot
sciatic nerve
division of sciatic
common fibular and tibial nerve
divides usually in lower 1/3 of thigh
3 of the 4 hamstring muscles attach to
ischial tuberosity proximally
what are the 4 hamstring muscles
semimembranosus, semitendinosus, and the long and short heads of biceps femoris
hamstring muscles act to
extend and flex hip and knee
tendons of hamstrings bound the..
popliteal fossa superomedially and superolaterally
what is the biceps femoris?
attaches to lateral aspect of head of fibula
why is short head not considered true hamstring muscle
- attaches prox. to linea aspera of femur, not to ischial tuberosity
- doesn’t cross hip joint: no movement of hip
- supplied by common fibular not tibial branch
where do semimebranosis and semitendinosis attach?
proximal tibia
tendinitis- longer tendon
membranosis- shiny membranous appearance
acetabular labrum?
increases depth of acetabulum (socket of hip bone), the ligament at the head of the femur is ruptured during dislocation
semimebranosis and semitendinosis attachments, innervation, action
both prox: ischial tuberosity
distal: mem- posterior part of medial condyle of tibia; reflected attachment forms oblique popliteal ligament (to lateral femoral condyle), tend- medial surface of superior part of tibia
innervation: tibial nerve (L5, S1, S2)
action: extend thigh, flex and rotate leg medially when knee is flexed, extend trunk when thigh and leg muscles are flexed
biceps femoris attachment, innervation, action
prox: long- ischial tuberosity, short - lineament aspera and lateral supracondular line of femur
distal: lateral side of head of fibula (tendon split at this site by fibular collateral ligament of knee)
innervation: long: tibial, short: common fibular
action: flexes leg and rotates it laterally when knee is flexed, extends thigh (accelerating mass during first step of gait)
