Anatomy Lower Limb Muscles

iliac fossa

Iliacus Origin

lesser trochanter of femur

Iliacus Insertion

flexes the thigh

Iliacus Action

lateral sides and transverse processes of T12 and lumbar vertebrae

Psoas Major Origin

lesser trochanter of femur

Psoas Major Insertion

flexes thigh, laterally bends vertebral column

Posas Major Action

ASIS

Sartorius Origin

proximal portion of the medial condyle of tibia

Sartorius Insertion

flexes thigh, flexes knee, abducts and laterally rotates thigh

Sartorius Action

AIIS, superior margin of acetabulum

Rectus Femoris Origin

patella and tibial tuberosity

Rectus Femoris Insertion

extends knee, flexes thigh

Rectus Femoris Action

greater trochanter, intertrochanteric line, proximal half of linea aspera

Vastus Lateralis Origin

patella and tibial tuberosity

Vastus Lateralis Insertion

extends knee, stabilizes patella

Vastus Lateralis Action

linea aspera, intertrochanteric line

Vastus Medialis Origin

patella and tibial tuberosity

Vastus Medialis Insertion

extends knee, stabilizes patella

Vastus Medialis Action

superior ramus of pubis

Pectineus Origin

posterior femur between lesser trochanter and linea aspera

Pectineus Insertion

adducts thigh flexes thigh, medially rotates thigh

Pectineus Action

body of pubis

Adductor Longus Origin

linea aspera

Adductor Longus Insertion

adducts thigh, flexes thigh, medially rotates thigh

Adductor Longus Action

adductor femoris

Cat counterpart of adductor magnus

ischial tuberosity, ischial ramus, inferior ramus of pubis

Adductor Magnus Origin

linea aspera and adductor tubercle of femur

Adductor Magnus Insertion

adducts thigh, medially rotates thigh

Adductor Magnus Action

inferior ramus of pubis

Adductor Brevis Origin

superior linea aspera

Adductor Brevis Insertion

adducts thigh, flexes thigh, rotates thigh medially

Adductor Brevis Action

body and inferior ramus of pubis, ishcial ramus

Gracilis Origin

medial surface of upper tibia

Gracilis Insertion

adducts thigh, medially rotates thigh, flexes leg

Gracilis Action

ischial tuberosity and lower half of posterior femur

Biceps Femoris Origin

head of fibula, lateral condyle of tibia

Biceps Femoris Insertion

extends thigh, flexes knee

Biceps Femoris Action

ischial tuberosity

Semitendinosus Origin

upper medial portion of tibia

Semitendinosus Insertion

extends thigh, flexes knee

Semitendinosus Action

ischial tuberosity

Semimembranosus Origin

posterior surface of medial condyle of tibia

Semimembranosus Insertion

extends thigh, flexes knee

Semimembranosus Action

posterior and lateral portions of ilium, sacrum, and coccyx

Gluteus Maximus Origin

gluteal tuberosity of femur

Gluteus Maximus Insertion

extends thigh, laterally rotates thigh, abducts thigh

Gluteus Maximus Action

between posterior and anterior gluteal lines on the outer surface of ilium

Gluteus Medius Origin

greater trochanter of femur

Gluteus Medius Insertion

abducts thigh, medially rotates thigh, stabilizes pelvis while walking

Gluteus Medius Action

cat specific

Caudofemoralis

connective tissue fascia covering gluteus medius

Tensor Fascia Latae Origin

into fascia lata that covers lateral surface of the thigh

Tensor Fascia Latae Insertion

flexes thigh, abducts thigh

Tensor Fascia Latae Action

lateral condyle and upper diaphysis of tibia

Tibialis Anterior Origin

cuneiform and first metatarsal

Tibialis Anterior Insertion

dorsiflexes food, inverts foot

Tibialis Anterior Action

lateral condyle of the tibia and upper portion of the fibula

Extensor Digitorum Longus Origin

phalanges and connective tissues of toes 2-5

Extensor Digitorum Longus Insertion

extends the toes, dorsiflexes foot

Extensor Digitorum Longus Action

upper lateral fibula

Fibularis/Peroneus Longus Origin

cuneiform and first metatarsal

Fibularis/Peroneus Longus Insertion

everts the foot, plantar flexes foot

Fibularis/Peroneus Longus Action

medial and lateral condyles of femur

Gastrocnemius Origin

posterior surface of calcaneus

Gastrocnemius Insertion

plantar flexes foot, assists in knee flexion

Gastrocnemius Action

head of fibula, proximal tibia, interosseous membrane

Soleus Origin

posterior surface of calcaneus

Soleus Insertion

plantar flexes foot

Soleus Action

posterior tibia

Flexor Digitorum Longus Origin

distal phalanges of toes 2-5

Flexor Digitorum Longus Insertion

flexes toes, stabilizes foot

Flexor Digitorum Longus Action