Muscles Of The Frog

Front 1

Pectorals

Back 1

Origin: sternum and fascia Insertion: humerus flexes

Front 2

rectus abdominus

Back 2

origin: pubic border insertion: sternum supports abdominal viscera

Front 3

external oblique

Back 3

origin: dorsal fascia and ilium insertion: sternum and linea alba constricts abdomen and supports viscera

Front 4

transversus

Back 4

Origin: ilium and vertebra insertion: linea alba supports abdominal viscera

Front 5

sartorius

Back 5

origin: pubis insertion: tibufibila flexes shank and adducts thighs

Front 6

adductor magnus

Back 6

origin: pubic and ischial symphysis insertion: distal end of femur adducts and flexes thigh

Front 7

Gracilis major and minor

Back 7

origin: ischium
Insertion: tibiofibula
adducts thigh and flexes or extends shank acc. to position

Front 8

adductor longus

Back 8

origin: ilium
insertion: femur
adducts thigh

Front 9

triceps femoris

Back 9

origin: one head on acetabulum and two on ilium
insertion: tibiofibula
adducts thigh and extends lower leg

Front 10

biceps femoris

Back 10

origin: ilium
insertion: tibiofibula
flexes shank

Front 11

semimembranosus

Back 11

origin: ischium
insertion: tibiofibula
adducts thigh and flexes or extends shank

Front 12

gluteus

Back 12

origin: ilium
insertion: femur
rotates thigh forward

Front 13

gastrocnemius

Back 13

origin: two heads at distal ends of femur from triceps femoris
insertion: achilles tendon to sole of foot
flexes shank and extends ankle and foot

Front 14

peroneus

Back 14

origin: femur
insertion: distal end of tibiofibula
extends shank farther, flexes farther

Front 15

tibialis anterior longus

Back 15

origin: femur, divides into two bellies
insertion: by two tendons on ankle bones
extends shank and flexes ankle

Front 16

extensor cruris

Back 16

origin: femur
insertion: ventral surface of tibiofibula
extends shank

Front 17

tibialis postenor

Back 17

origin: side of tibiofibula
insertion: ankle
extends foot when flexed, flexes foot when extended