Musculature of the Lower Limbs OIAs
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122 Terms
Psoas major
Origin
T12 and lumbar vertebrae
Insertion
Lesser trochanter of femur
Action
Flexes thigh and flexes trunk on femur (hip joint)
Iliacus
Origin
Iliac crest and fossa
Insertion
Lesser trochanter of femur
Action
Flexes thigh and flexes trunk on femur (hip joint)
Gluteus maximus
Origin
Iliac crest, posterior gluteal surface of ilium, sacrum, and coccyx
Insertion
Upper posterior surface of femur and iliotibial tract
Action
Extends and laterally rotates thigh (hip joint)
Gluteus medius
Origin
Middle gluteal surface of ilium
Insertion
Greater trochanter of femur
Action
Abducts and medially rotates thigh (hip joint)
Gluteus minimus
Origin
Inferior gluteal surface of ilium
Insertion
Greater trochanter of femur
Action
Abducts and medially rotates thigh (hip joint)
Tensor fascia latae
Origin
Iliac crest and lateral anterior inferior iliac spine
Insertion
Iliotibial tract
Action
Flexes, abducts, and medially rotates thigh (hip joint) (laterally supports knee)
Piriformis
Origin
Sacrum
Insertion
Greater trochanter of femur
Action
Laterally rotates and abducts thigh (hip joint)
Obturator internus
Action
Laterally rotates and abducts thigh (hip joint)
Adductor magnus
Origin
Inferior ramus of pubis and ischium
Insertion
Linea aspera of femur
Action
adducts and laterally rotates thigh (hip joint)
Adductor longus
Origin
Crest and symphysis of pubis
Insertion
Linea aspera of femur (middle)
Action
Adducts and laterally rotates thigh (hip joint)
Adductor brevis
Origin
Inferior ramus of pubis
Insertion
Linea aspera of femur (upper)
Action
Adducts and laterally rotates thigh (hip joint)
Pectineus
Action
Adducts and flexes thigh (hip joint)
Gracilis
Origin
Inferior ramus of pubis
Insertion
Proximal medial surface of tibia
Action
adducts thigh/hip and flexes leg/knee
Sartorius
Origin
Anterior superior iliac spine
Insertion
Proximal medial surface of tibia
Action
Flexes thigh and leg/knee and laterally rotates thigh/hip
Rectus femoris
Origin
anterior inferior iliac spine
Insertion
Tibial tuberosity via the patella
Action
Extends leg/knee and flexes thigh/hip
Semitendinosus
Origin
Ischial tuberosity
Insertion
Proximal medial surface of tibia
Action
Flexes leg/knee and extends thigh/hip
Semimembranosus
Origin
Ischial tuberosity
Insertion
Proximal medial surface of tibia
Action
Flexes leg/knee and extends thigh/hip
Biceps femoris (long head)
Origin
Ischial tuberosity
Insertion
Head of fibula and lateral condyle of tibia
Action
Flexes leg/knee and extends thigh/hip
Biceps femoris short head
Origin
Linea aspera of femur
Insertion
Head of fibula and lateral condyle of tibia
Action
Flexes leg/knee
Vastus lateralis
Origin
Greater trochanter and linea aspera of femur
Insertion
Tibial tuberosity via the patella
Action
Extends leg/knee
Vastus medialis
Origin
Linea aspera of femur
Insertion
Tibial tuberosity via the patella
Action
Extends leg/knee
Vastus intermedius
Origin
Anterior surface of femur
Insertion
Tibial tuberosity via the patella
Action
Extends leg/knee
Popliteus
Origin
Lateral condyle of femur
Insertion
Proximal portion of tibia
Action
Flexes and rotates leg/knee
Gastrocnemius
Origin
Medial and lateral condyles of femur
Insertion
Calcaneus
Action
Flexes leg/knee and plantar flexes foot
Tibialis anterior
Origin
Lateral condyle of tibia and interosseus membrane
Insertion
Medial surface of 1st cuneiform and 1st metatarsal
Action
Dorsiflexes and inverts foot
Extensor hallucis longus
Origin
FIbula and interosseus membrane
Insertion
dorsal surface of great toe
Action
Dorsiflexes and inverts foot and extends great toe