Lab 10 Muscular System Pt 3

Levator ani origin

Lateral anterior aspect of pelvic outlet

Levator ani insertion

Midline from coccyx forward

Levator ani action

Fight gravity to support pelvic contents

Coccyegus origin

Spine of ischium

Coccygeus insertion

Sacrum and coccyx

Coccygeus action

Fights gravity to support pelvic contents

External urethral sphincter

Constricts opening of urethra

External anal sphincter

Constricts anus

Iliacus origin

Iliac fossa

Iliacus insertion

Lesser trochanter of femur

Iliacus action

Flexion of whole leg at the hip

Psoas major origin

Lumbar vertebrae

Psoas major insertion

Lesser trochanter of femur

Psoas major action

Flexes hip

Sartorius origin

Anterior superior spine of ilium

Sartorius insertion

Medial aspect of proximal tibia

Sartorius action

Flexion of whole leg, lateral rotation of leg, flexion at knee

Adductor magnus origin

Ischium and pubisA

Adductor magnus insertion

Linea aspera of femur

Adductor magnus action

Adducts at the hip

Adductor Longus origin

Pubic crest and symphysis

Adductor longus insertion

Linea aspera of femur

Adductor longus action

Adducts at hip

Pectineus origin

Pubis and superior ramus

Pectineus insertion

Lesser trochanter of femur

Pectineus action

Adducts, flexes and medially rotates thigh

Gracilis origin

Pubis ramus

Gracilis insertion

Medial surface of tibia

Gracilis action

Adducts at hip, medially rotates leg, flexes at knee

Rectus femoris origin

Anterior inferior iliac spine

Rectus femoris insertion

Tibial tuberosity

Rectus femoris action

Flexes whole leg at hip and extension at the knee

Vastus lateralis origin

Greater trochanter and linea aspera

Vastus lateralis insertion

Tibial tuberosity

Vastus lateralis action

Extension at knee

Vastus medialis origin

Linea aspera

Vastus medialis insertion

Tibial tuberosity

Vastus medialis action

Extension at knee

Vastus intermedius origin

Anterior and lateral diaphysis of femur

Vastus intermedius insertion

Tibial tuberosity

Vastus intermedius action

Extension at knee

Tensor fasciae lata origin

Iliac crest

Tensor fasciae lata insertion

Iliotibial tract

Tensor fasciae lata action

Flexes at hip and medial rotation at hip

Gluteus maximus origin

Sacrum and coccyxG

Gluteus maximus insertion

gluteal tuberosity of femurGl

Gluteus maximus action

Extension at hip and lateral rotation at hip

Gluteus medius origin

Lateral surface of ilium

Gluteus medius insertion

Greater trochanter of femurG

Gluteus medius action

Abduction at hip

Piriformis origin

Anterior surface of sacrum

Piriformis insertion

Greater trochanter of femur

Piriformis action

Lateral rotation of hip

Quadratus femoris origin

Ischial tuberosity

Quadratus femoris insertion

Intertrochanteric crest of femur

Quadratus femoris action

Lateral rotation of hip

Superior gemellus origin

ischial spine and tuberosity

Superior gemellus insertion

Greater trochanter of femurS

Superior gemellus action

Lateral rotation at hip

Inferior genellus origin

Ischial spine and tuberosity

Inferior gemellus insertion

Greater trochanter of femurI

Inferior gemellus action

Lateral rotation at hip

Obturator internus origin

Greater sciatic notch

Obturator internus insertion

Greater trochanter of femur

Obturator internus action

Lateral rotation at hip

Biceps femoris long head origin

Ischial tuberosity

Biceps femoris short head origin

Linea aspera

Biceps femoris insertion

Head of fibula

Biceps femoris action

extension of whole leg and flexion at knee

Semitendinosus origin

Ischial tuberosity

Semitendinosus insertion

Proximal shaft of tibia

Semitendinosus action

Extension of whole leg and flexion at knee

Tibialis anterior origin

Lateral condyle of tibia

Tibialis anterior insertion

Area of metatarsal 1

Tibialis anterior action

Dorsiflexion and inversion at ankle

Extensor digitorum longus origin

lateral condyle of tibia

Extensor digitorum longus insertion

Middle and distal phalanges 2-5

Extensor digitorum longus action

Extension of toes and dorsiflexion at ankle

Fibularis longus origin

Head of fibula

Fibularis longus insertion

Metatarsal 1 from below

Fibularis longus action

Eversion at ankle

Fibularis brevis origin

Body of fibulaF

Fibularis brevis insertion

Metatarsal 5

Fibularis brevis action

Plantar flexion and eversion of foot

Gastrpcnemius origin

By 2 heads from medial and lateral condyles of femur

Gastrocnemius insertion

Calcaneus by achilles tendon

Gastrocnemius action

Plantar flexion at the ankle

Soleus origin

Heads of tibia and fibula

Soleus insertion

Calcaneus by achilles tendon

Soleus action

Plantar flexion at the ankle

Plantaris origin

Posterior femur on lateral condyle

Plantaris insertion

Via long tendon to calcaneus

Plantaris action

Plantar flexion at ankle and flexion at knee to unlock

Popliteus origin

Lateral condyle of femur

Popliteus insertion

Proximal tibia

Popliteus action

Flexion at knee to unlock

Flexor digitorum longus origin

Posterior tibia

Flexor digitorum longus insertion

Behind medial aspect of ankle to phalanges from below

Flexor digitorum longus action

Flexion of toes, plantar flexion at ankle and inversion at ankle

Tibilais posterior origin

Posterior superior tibia and fibula