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physci 107
iliopsoas ( iliacus + psoas)
Origin: psoas major: transverse process/bodies of lumbar vertebrae; iliacus: iliac fossa
Insertion: Lesser trochanter
Action: flex hip/torso (more so the psoas major)
gluteus maximuis
origin: ilium, sacrum, coccyx
insertion: gluteal tuberosity of femur
action: extend, abduct, laterally rotate thigh
gluteus medius
origin: ilium
insertion: greater trochanter of femur
action: abduct, medial rotation of thigh
gluteus minimus
origin: ilium
insertion: greater trochanter of femur
action: abduct, medial rotation of thigh
piriformis
under gluteus minimus
tensor fasciae latae and iliotibial band
lateral side of thigh
rectus femoris
origin: anterior inferior iliac spine
insertion: tibial tuberosity via patellar tendon
action: extend knee, flex hip
vastus lateralis
origin: linea aspera
insertion: tibial tuberosity via patellar tendon
action: extend knee
vastus medialis
origin: linea aspera
insertion: tibial tuberosity via patellar tendon
action: extend knee
vastus intermedius
origin: anterior femur
insertion: tibial tuberosity via the patellar tendon
action: extend knee
sartorius
origin: anterior superior iliac spine
insertion: medial proximal tibia
action: flex hip/knee, abduct hip, lateral rotation of thigh
gracilis
origin: inferior ramus of pubis
insertion: medial proximal tibia
action: adduct thigh, flex knee
adductor longus
origin: pubis
insertion: linea aspera
action: adduct/flex thigh, medial rotate thigh
adductor magnus
origin: ischial tuberosity, ischial/pubis rami
insertion: linea aspera, medial supracondylar line, adductor tubercle
action: adduct/flex/extend/medial rotate thigh
biceps femoris (long head and short head)
origin: short head: linea aspera, long head: ischial tuberosity
insertion: head of fibula, proximal lateral tibia
action: flex knee, extend thigh (long head)
semitendonosus
Origin: ischial tuberosity
insertion: proximal medial tibia
action: flex knee, extend thigh
semimembranosus
origin: ischial tuberosity
insertion: proximal medial tibia
action: flex knee, extend thigh
gastrocnemius
origin: medial/lateral condyle of femur
insertion: calcaneal tuberosity via calcaneal tendon
action: plantar flexion, flex knee
soleus
origin: superior tibia, fibula, interouseous membrane
insertion: calcaneal tuberosity via calcaneal tendon
action: plantar flexion
tibialis posterior
deep to soleus
action: inversion/plantar flexion of foot
tibialis anterior
action inversion/dorsiflexion of foot
fibularis (longus and brevis)
action: eversion/ plantar flexion of foot
temporalis
origin: temporal fossa
insertion: coronoid process of mandible
action: elevates mandible
masseter
origin: zygomatic arch
insertion: angle/ramus of mandible
action: elevate mandible, work to move mandible medio-laterally
external oblique
action: trunk flexion, rotate, lateral flexion
internal oblique
action: trunk flexion, rotate, lateral flexion
transverse abdominis
action: compress viscera
rectus abdominis and linea alba
action: flex trunk
