lab 8 : pelvic girdle + lower limb muscles - origin, insertion, action

gluteus maximus - origin

dorsal ilium, sacrum, and coccyx

gluteus maximus - insertion

gluteal tuberosity of femur, iliotibial tract

gluteus maximus - action

major extensor of thigh

gluteus medius - origin

between anterior and posterior gluteal lines on lateral surface of ilium

gluteus medius - insertion

by short tendon into lateral aspect of greater trochanter of femur

gluteus medius - action

abducts and medially rotates thigh

gluteus minumus - origin

between anterior and inferior gluteal lines on external surface of ilium

gluteus minimus - insertion

anterior border of greater trochanter of femur

gluteus minimus - action

abducts and medially rotates thigh

piriformis - origin

anterolateral surface of sacrum

piriformis - insertion

superior border of greater trochanter of femur

piriformis - action

rotates extended thigh laterally

gemellus superior - origin

ischial spine

gemellus inferior - origin

ischial tuberosity

gemellus superior and inferior - insertion

greater trochanter of femur

gemellus superior and inferior - action

rotates extended thigh laterally

obturator externus - origin

outer surface of obturator membrane, pubis and ischium, margins of obturator foramen

obturator externus - insertion

by a tendon into trochanteric fossa of posterior femur

obturator externus - action

rotates extended thigh laterally

obturator internus - origin

inner surface of obturator membrane, greater sciatic notch

obturator internus - insertion

greater trochanter in front of piriformis

quadratus femoris - origin

ischial tuberosity

quadratus femoris - insertion

intertrochanteric crest of femur

quadratus femoris - action

rotates thigh laterally and stabilizes hip joint

tensor fascia lata - origin

anterior aspect of iliac crest and iliac spine

tensor fascia lata - insertion

iliotibilal tract

tensor fascia lata - action

steadies the leg and trunk on thigh

iliopsoas iliacus - origin

iliac fossa and cresy

iliopsoas iliacus - insertion

lesser trochanter of femur

iliopsoas iliacus - action

prime mover of flexing thigh, flexing trunk on thigh

iliopsoas psoas major - origin

transverse processes, bodies, and discs of lumbar vert

iliopsoas psoas major - insertion

lesser trochanter of femur

iliopsoas psoas major - action

prime mover of flexing thigh, flexing trunk on thigh

biceps femoris - origin

long head - ischial tuberosity

short head - linea aspera, lateral supracondylar lime and distal femur

biceps femoris - insertion

by common tendon to head of fibula and lateral condyle of tibia

biceps femoris - action

extend thigh and flexes leg, laterally rotates leg

semitendinosus - origin

ischial tuberosity in common with long head of biceps femoris

semitendinosus - insertion

medial aspect of upper tibial shaft

semitendinosus - action

extends thigh and flexes leg

semimembranosus - origin

ischial tuberosity

semimembranosus - insertion

medial condyle of tibia, lateral condyle of femur

semimembranosus - action

extends thigh and flexes leg

gracilis - origin

inferior ramus, body of pubis and ischial ramus

gracilis - insertion

medial surface of tibia inferior its medial condyle

semimembranosus - action

adducts thigh, flexes and medially rotates leg

adductor magnus - origin

ischial and pubic rami, and ischial tuberosity

adductor magnus - insertion

linea aspera and adductor tubercle of femur

adductor magnus - action

adducts, medially rotates, and flexes thigh. thigh extension

adductor longus - origin

pubis near pubic symphysis

adductor longus - insertion

linea aspera

adductor longus - action

adducts, flexes, and medially rotates thigh

adductor brevis - origin

body and inferior pubic ramus

adductor brevis - insertion

linea aspera

adductor brevis - action

adducts, flexes, and medially rotates thigh

sartorius - origin

anterior superior iliac spine

sartorius - insertion

medial aspect of proximal tibia

sartorius - action

flexes, abducts, and laterally rotates thigh

pectineus - origin

pubis

pectineus - insertion

lesser trochanter, posterior aspect of femur

pectineus - action

adducts, flexes, and medially rotates thigh

quadriceps femoris ; rectus femoris - origin

anterior inferior iliac spine and superior margin of acetabulum

quadriceps femoris ; rectus femoris - insertion

patella and tibial tuberosity

quadriceps femoris ; rectus femoris - action

extends leg and flexes thigh at hip

quadriceps femoris ; vastus lateralis - origin

greater trochanter, linea aspera

quadriceps femoris ; vastus lateralis - insertion

patella and tibial tuberosity

quadriceps femoris ; vastus lateralis - action

extends and stabilizes leg

quadriceps femoris ; vastus medialis - origin

linea aspera, intertrochanteric

quadriceps femoris ; vastus medialis - insertion

patella and tibial tuberosity

quadriceps femoris ; vastus medialis - action

extends leg

quadriceps femoris ; vastus intermedius - origin

anterior and lateral surface of proximal femur shaft

quadriceps femoris ; vastus intermedius - insertion

patella and tibial tuberosity

quadriceps femoris ; vastus intermedius - action

extends leg

tibialis anterior - origin

lateral condyle and upper tibial shaft

tibialis anterior - insertion

inferior surface of medial cuneiform, 1st metatarsal

tibialis anterior - action

prime mover of dorsiflexion

extensor digitorum longus - origin

lateral condyle of tibia, proximal ¾ of fibula

extensor digitorum longus - insertion

middle and distal phalanges of 2nd - 5th toe

extensor digitorum longus - action

prime mover of toe extension

extensor hallucis longus - origin

anteromedial fibula shaft

extensor hallucis longus - insertion

distal phalanx of great toe

extensor hallucis longus - action

extend big toe

popliteus - origin

lateral condyle of femur, lateral meniscus of knee

popliteus - insertion

proximal tibia

popliteus - action

flexes and rotates leg medially

gastrocnemius - origin

by 2 heads from medial and lateral condyle of femur

gastrocnemius - insertion

posterior calcaneus

gastrocnemius - action

plantar flexes foot

soleus - origin

superior tibia and fibula

soleus - insertion

posterior calcaneus

soleus - action

plantar flexor of foot

tibialis posterior - origin

superior tibia and fibula

tibialis posterior - insertion

several tarsals and metatarsals

tibialis posterior - action

prime mover of foot inversion

flexor digitorum longus - origin

posterior tibia

flexor digitorum longus - insertion

distal phalanges of 2nd to 5th toes

flexor digitorum longus - action

plantar flexes and inverts foot, flexes toes

fibularis longus - origin

head and upper portion of lateral fibula

fibularis longus - insertion

first metatarsal and medial cuneiform

fibularis longus - action

plantar flexes and everts foot

superior and inferior extensor retinaculum of foot - action

holds the tendons of the extensor muscles of the foot and toes in place