Lecture 19 Flashcards
iliopsoas (iliacus and psoas major)
O: iliac fossa; T12-L5 vertebrae
I: lesser trochanter of femur
A: prime mover of thigh flexion, laterally flex the vertebral column
sartorius
O: anterior superior iliac spine
I: medial side of proximal tibia
A: flexes, abducts, and laterally rotates the thigh; weakly flexes the knee
the process of crossing the legs at the knees
Gluteus maximus
O: posterior ilium, sacrum, coccyx
I: linea aspera, iliotibial tract (IT band)
A: prime mover of thigh extension, laterally rotates and abducts the thigh
gluteus medius and minimus
O: lateral ilium
I: greater trochanter of femur
A: abduct and medially rotate the thigh
the gluteus medius is a common spot for what?
shots
medial muscles of the thigh
generally -> adduct
o- inferior aspect of the pelvis
i- femur or the tibia
adductor magnus, brevis, and longus
O: pubis and/or ischium
I: linea aspera of femur
A: adduct and flex the thigh synergistically
pectineus
O: pubis
I: lesser trochanter and linea aspera of femur
A: adducts and flexes the thigh
gracilis
O: pubic symphysis
I: medial surface of tibia
A: adducts the thigh, flexes the leg
the action of doing high knees
anterior muscles of the thigh
generally -> they extend the leg
what are the muscles of the anterior thigh composed and called
the quadriceps femoris (quads)
rectus femoris
O: ilium
I: upper border of patella and tibial tuberosity
A: flexes the thigh, extends the knee
runs straight up and down the femur
vastus lateralis, medialis, and intermedius
O: greater trochanter and shaft of the femur
I: tibial tuberosity
A: extend the leg
tensor fascia lata
O: iliac crest and anterior superior iliac spine
I: iliotibial tract (IT band)
A: steadies the leg by making IT band tight
posterior muscles of the thigh
generally -> extend the thigh and flex the leg
make up the hamstrings
biceps femoris
O: ischial tuberosity and femur
I: fibular head & lateral condyle of tibia
A: extend the thigh and flex the leg
semitendinosus and semimembranosus
O: ischial tuberosity
I: medial tibia
A: extends the thigh and flexes the leg
piriformis
O: anterior surface of the sacrum, the gluteal surface of the ilium, the sacroiliac ligament
I: superior border of the greater trochanter of the femur
A: laterally rotates the leg and stabilizes the hip joint. abducts the hip joint
obturator externus and obturator internus
O: the pelvis bone
I: greater trochanter of the femur
A:rotate the hip externally and provide stability to the hip joint
Gemellus
O: superior -> ischial spine, inferior -> ischial tuberosity
I: posteromedial surface of the greater trochanter
A: externally rotate the hip, extend/abduct the hip
quadratus femoris
O: lateral margin of ischial tuberosity
I: tubercle of the femur
A: rotate hip laterally, adduct the hip, stabilize head of the femur
anterior muscles of the leg
tibialis anterior
O: lateral condyle and shaft of tibia
I: 1st metatarsal and medial cuneiform
A: dorsiflexes and inverts the foot
prime mover of dorsiflexion
extensor digitorum longus
O: proximal tibia and fibula
I: middle and distal phalanges 2-5
A: dorsiflexes the foot and extends toes 2-5
