Thigh Flashcards
Semitendinosus
O: Ischial tuberosity
I: Pes Anserine
A: knee flexion, hip extension, posterior pelvic tilt.
N: sciatic
Blood: inferior gluteal, obturator and deep femoral
Biceps femoris
O: LONG: Ischial tuberosity: SHORT: Linea aspera
I: head of fibula and lateral tibial condyle
A: knee flexion. LONG head only: hip extension and posterior pelvic tilt.
N: sciatic
Blood: inferior gluteal, obturator and deep femoral
Semimembranosus
O: Ischial tuberosity
I: medial condyle of tibia (posterior-medial surface)
A: knee flexion, hip extension, posterior pelvic tilt.
N: sciatic
Blood: inferior gluteal, obturator and deep femoral
Tensor Fascia latae
O: ASIS I: IT band (prox 1/3) A: abduction, medial rotation, flexion, anterior pelvic tilt N: superior gluteal Blood: deep femoral and superior gluteal
Sartorius
O:ASIS I: pes Anserine A: flexion, abduction and lateral rotation at hip. Knee flexion. Anterior pelvic tilt. N: femoral Blood: femoral
Rectus femoris
O: AIIS
I: Tibial tuberosity (via patellar ligament)
A: hip flexion, knee extension, anterior pelvic tilt
N: femoral
Blood: femoral and deep femoral
Vastus lateralis
O: Linea aspera (lateral lip)
I: tibial tuberosity (via patellar ligament)
A: knee extension; some external rotation
N: femoral
Blood: femoral, deep femoral and popliteal
Vastus medialis
O: linea aspera (medial lip) I: tibial tuberosity A: knee extension N: femoral Blood: femoral
What is the common insertion for all the quads?
Tibial tuberosity
What are the borders of the femoral triangle?
Iliolingual ligament (superior) Sartorius (lateral) Adductor longus (medial)
Vastus intermedius
O: Linea aspera (lateral lip) and anterior shaft of humerus I: tibial tuberosity A: knee extension N: femoral Blood: deep femoral
Articularis genu
O: anterior distal humerus I: joint capsule of knee A: pulls knee capsule and patella proximally during knee extension N: femoral Blood: deep femoral
Pectineus
O: Pectineal line of pubis I: Pectineal line of proximal femur A: adduction. Flexion. Anterior pelvic tilt N: femoral Blood: femoral, deep femoral, obturator
Adductor longus
O:anterior pubis I: medial lip of linea aspera A: adduction, flexion, anterior tilt N: obturator Blood: femoral. Deep femoral. Obturator.
Gracilis
O: pubis: anterior body and inferior ramus
I: pes anserine
A: adduction, flexion, anterior pelvic tilt
N: obturator
Blood: deep femoral and obturator.
Adductor brevis
O: pubis (inferior ramus) I: linea asperis (prox 1/3) A: adduction, flexion, anterior pelvic tilt N: obturator Blood: femoral, deep femoral, obturator
From superior to deep, the adductor brevis is in between what muscles?
Adductors Longus and Magnus
Adductor Magnus
O: ANTERIOR HEAD: pubis (inferior ramus) and ischium (ramus); POSTERIOR HEAD: ischial tuberosity
I: linea aspera (gluteal tuberosity, adductor tubercle and supra condylar line)
A: adduction. Extension. Posterior pelvic tilt.
Nerve: 1) obturator (ant). 2) sciatic (post)
Blood: ANTERIOR: femoral, deep femoral, obturator. POSTERIOR: deep femoral, inferior gluteal, popliteal, obturator.
What nerve innervates the posterior thigh?
Sciatic
What nerve innervates the anterior thigh?
Femoral
What nerve innervates the medial thigh?
Mostly obturator.
Pectineus innervated by femoral. Adductor Magnus also innervated by sciatic
What happens to the sciatic nerve when it crosses the popliteal fossa?
It splits into tibial and common Fibular nerves.
What is the blood supply for the posterior thigh?
Inferior gluteal
Obturator
Deep femoral arteries