LEG MUSCLES Flashcards
ILLIACUS
→ flexes thigh Up or trunk on thigh
PSOAS MAJOR
→ flexes thigh or trunk on thigh- bend Trunk forward toward knees (same as iliacus)
→ lateral flexion of the vertebral column (moving back side to side).
SARTORIUS
→ flexes. Abducts, and laterally rotates the thigh FAL
→ weakly flexes knee joint to achieve criss cross applesauce
ADDUCTOR MAGNUS
→ anterior: flexes, adducts( back to anatomical), and medially rotates the thigh
→ posterior: extends thigh
RECTUS FEMORIS (QUADRICEPS)
→ extends leg (kick back into anatomical position), flexes thigh at the hip
Origin (stationary): anterior inferior iliac spine of coxal bone
insertion ( moves towards origin): patella and tibial tuberosity via patellar ligament.
VASTUS LATERALIS (QUADRICEPS)
→ extends and stabilizes leg
VASTUS MEDIALIS (QUADRICEPS)
→ extends leg
VASTUS INTERMEDIUS (QUADRICEPS)
→ extends leg
GLUTEUS MAXIMUS
→ extend thigh with power, as in climbing or running
→ laterally rotates and abducts thigh (show our inner thigh)
Origin: dorsal ilium of coxal bone, coccyx, and sacrum
Insertion: gluteal tuberosity of femur and, iliotibial tract
GLUTEUS MEDIUS
→ abducts and medially rotates the thigh to maintain the pelvis level when walking
Origin: lateral surface of ilium of the coxal bone
Insertion: greater trochanter of femur
BICEPS FEMORIS
→ Extends thigh; flexes and laterally rotates leg
Origin: ischial tuberosity (longhead) of the coxal bone, linea aspera of the femur (shorthead)
Insertion: head of fibula and lateral condyle of tibia
SEMIMEMBRANOSUS
→ extends the thigh, flexes and medially rotates the leg
SEMITENDINOSUS
→ extends the thigh, flexes and medially rotates the leg (same as semitendinosus)
TIBIALIS ANTERIOR
→ dorsiflexion and inversion of the foot
FIBULARIS LONGUS
→ plantar flexion, eversion of foot
