origin insertion and action practical 2

Question 1

gastrocnemius (origin)

Answer 1

but 2 head from medial & lateral condyles of femur

Question 2

gastrocnemius (insertion)

Answer 2

calcaneus via calcaneal tendon

Question 3

gastrocnemius (action)

Answer 3

plantar flexes foot when leg is extended

Question 4

gluteus maximus (origin)

Answer 4

dorsal, ilium, sacrum, and coccyx

Question 5

gluteus maximus (insertion)

Answer 5

gluteal tuberosity of femur & iliotibial tract

Question 6

gluteus maximum (action)

Answer 6

complex, powerful thigh extensor; antagonist of iliopsoas; laterally rotates and abducts thigh

Question 7

illiacus (origin, insertion, action)

Answer 7

origin: iliac fossa and crest, lateral sacrum

insertion: on and just below lesser trochanter

action: flex trunk at hip joint, flex thigh

Question 8

psoas major (origin, insertion, action)

Answer 8

origin: transverse processes, bodies, and discs of T12 and lumbar vertebrae

insertion: on and just below lesser trochanter

action: lateral flexion of vertebral column; flex trunk at hip joint, flex thigh

Question 9

rectus femoris (origin, insertion, action)

Answer 9

origin: anterior inferior iliac spine & superior margin of acetabulum

insertion: tibia tuberosity & patella

action: extends leg & flexes thigh

Question 10

vastus femoris (origin, insertion, action)

Answer 10

origin: greater trochanter, intertrochanteric

insertion: tibial tuberosity & patella

action: extends leg & stabilizes knee

Question 11

vastus medialis (origin, insertion, action)

Answer 11

origin: linea aspera & intertrochanteric line

insertion: tibial tuberosity & patella

action: extends leg; stabilizes patella

Question 12

vastus intermedius (origin, insertion, action)

Answer 12

origin: anterior & lateral surface of femur

insertion: tibial tuberosity & patella

action: extends leg

Question 13

tibialis anterior (origin, insertion, action)

Answer 13

origin: lateral condyle & upper 2/3 of tibia; interosseous membrane

insertion: by tendon into inferior surface of first cuneiform and metatarsal 1

action: prime mover of dorsiflexion; inverts foot; supports longitudinal arch of foot

Question 14

extensor digitorum (action)

Answer 14

prime mover of toe extension; dorsiflexes foot

Question 15

gracilis (action)

Answer 15

abducts thigh; flexes and medially rotates leg

Question 16

soleus (action)

Answer 16

plantar flexion

Question 17

sartorius (action)

Answer 17

flexes, adducts and laterally rotates thigh; flexes leg

Question 18

deltoid (origin, insertion, action)

Answer 18

origin: lateral 1/3 clavicle; acromion and spine of scapula

insertion: deltoid tuberosity of humerus

action: prime mover of arm abduction

Question 19

biceps brachii (origin, insertion, action)

Answer 19

origin: short head-coracoid process long head- supraglenoid tubercle