Fitp - Human Anatomy - Lower Extremity

Front 1

Iliopsoas

Back 1

○ 3 muscles known as Ilipsoas
§ Iliascus, psoas Major, and poas minor
§ O/I: Form lower back and hip to upper thigh
§ A: flex, external rotation of femur

Front 2

Rectus Femoris

Back 2

Only muscles of QUADS that crosses the hip joint
§ O/I: from lower hip to knee cap (ilium to patella)
§ A: flexes thigh, extends knee

Front 3

Vastus medialis/lateralis/intermedius

Back 3

○ O/I: top of femur/hip to patella
○ A: extends the knee

Front 4

Gluteus maximus

Back 4

○ O/I hip to upper thigh (iliac crest & sacrum to femur)
○ A: Extend at hip and externally rotate thigh

Front 5

Gluteus medius and minimus

Back 5

○ O/I: from hip to upper thigh (iliac crest to femur)
○ A: abduction thigh
§ Gluteal muscles are important in stabilization of the hip

Front 6

Hamstrings group

Back 6

○ O/I: from hip to upper portion of the leg (ischial tuberosity to tibia/fibula)
○ A: Hip extension flex leg at knee

Front 7

Gracilis

Back 7

○ O/I - Pubic symphysis to tibia
○ A - flexes the knee, adducts the thigh, and helps to medially rotate the tibia on the femur

Front 8

Sartorius "tailors Muscle"

Back 8

○ O/I - from hip to knee (iliac spice to tibia)
○ A - Flex, adduct, laterally (externally) rotate thigh at hip
○ Flex and slightly internally (medially) rotate leg at knee

Front 9

Adductor magnus, longus and brevis

Back 9

○ O/I from hip to upper portion of lower leg (knee) (pubic ramus to tibia/fibula)
○ A: Adduction
§ Medial thigh compartment

Front 10

Gastrocnemius

Back 10

§ O/I - Posterior femur to meet with soleus forming Achilles tendon and inserting in calcaneus
§ A - Flantar flexor of ankle

Front 11

Soleus

Back 11

§ O/I - Head of fibula/shaft of tibia to unite with gastrocnemius, forming achilles tendon
§ A - Plantar flexor of ankle

Front 12

Tibialis anterior

Back 12

§ O/I Tibia (lateral) to medial ankle
§ A - dorsiflexor of ankle and inverter of foot