Thigh Flashcards
What is the deep fascia of the thigh called?
Fascia lata
Fascia lata continuous superiorly with?
Anteriorly - inguinal l., pubic arch, body of pubis and pubic tubercle.
Posteriorly and laterally - iliac crest
Posteriorly and medially - sacrum, coccyx, sacrotuberous l., ishcial tuberosity and ishciopubic ramus.
Fascia lata continuous inferiorly with?
Exposed parts of bone around knee.
Popliteal fascia posteriorly.
Deep fascia of leg (crural fascia) inferior to knee.
As the fascia lata thickens laterally forming what (tract)?
Iliotibial band
- shared aponerousis of tensor fascia kata and gluteus maximus mm.
- from iliac tubercle to anterolateral tubercle of tibia (Gerdy’s tubercle)
What is the Saphenous opening?
- gap or hiatus inferior to medial part of inguinal l.
- has smooth medial margin
- superior, lateral and inferior margins form a sharp crescentic edge (falciform margin, joined by cribriform fascia)
- pierced by numerous openings for: lymphatic vassesls and great saphenous v.
Semitendinosus (pes anserinus m.)
O: ishial tuberosity
I: superior part medial surface of tibia (pea anserinus)
A: Extension of thigh and flexion of leg; MR (when knee is flexed)
N: tibial division of sciatic n. (L5, S1, S2)
Seimembranosus
O: ishial tuberosity
I: Posterior part of medial condyle of tibia
A: extension of thigh and flexion of leg; MR (when knee is flexed)
N: tibial division of sciatic n. (L5, S1, S2)
Biceps Fermoris
O: long head - ishcial tuberosity
short head - line aspera and lateral supracondylar line of femur.
I: lateral side head of the tibia
A: extension of thigh and flexion of leg; LR when knee is flexed
N: Long head - tibial division of sciatic n. (L5, S1, S2)
Short head - common fibular division of sciatic n. (L5, S1, S2)
What innervates the posterior thigh and where is each nerve from?
Sciatic n.
-from VPR L4-S3.
Posterior cutaneous n. of thigh (posterior femoral cutaneous n.)
-from VPR S1-3
-supplies skin over posterior thing and popliteal fossa
What are the two division of the sciatic n.?
Tibial division of sciatic n. -L4-S3 -Supplies "true hamstrings" Common fibular division of sciatic n. -L4-S2 -Supplies short head biceps femurs mmm.
What are the true hamstring muscles?
semimembranosus, semitendinosus, long head biceps femurs, hamstring portion of of adductor magnus mm.
What makes up the pes anserinus?
- Sartorius
- Gracilis
- Semitedninosus
Pectineus
O: superior pubic ramus
I: Pectineal line of femur, inferior to lesser trochanter
A: ADD and flexion of thigh
N: Femoral n. (L2,L3); may receive a branch from obturator n.
*transitional muscle between anterior and medial compartments
Iliopsoas
O: Iliacus-Iliac crest and fossa, ala of sacrum, anterior sacroiliac ll.
Psoas major - sides of T12-L5 vertebrae and IVD; TPs of all lumbar vertebrae
I: Iliacus - tendon of psoas major, lesser trochanter and femur distal to it. Psoas major - lesser trochanter.
A: flexion of thigh or trunk; stabilize hip joint
N: Iliacus - femoral n. (L2,L3) Psoas major - ventral rami of L1, L2
*chief flexor of thigh
*compased of iliac us and psoas major mm.
Sartorius
O: ASIS and superior part of notch inferior to it
I: Superior part medial surface of tibia (pea anserinus)
A: Flexion , ABD, and LR of thigh; flexion of leg; MR leg when knee is flexed
N: Femoral n. (L2,L3)
*tailors muscle
*acts on two joints
*permits cross-legged flexion