Lower Extremity Muscles

Question 1

Iliopsoas

Answer 1

Origin: vertebral column and illiac fossa
Insertion: lesser trochantar of femur
Action: hip flexion

Question 2

Sartorius

Answer 2

Origin: anterior superior illiac spine
Insertion: tibia
Action: hip flexion, external rotation, knee flexion

Question 3

Rectus Femoris of Quadriceps Femoris

Answer 3

Origin: anterior inferior illiac spine
Insertion: tibial tuberosity of patellar ligament
Action: hip flexion, knee extension

Question 4

Vastus Lateralis of Quadriceps Femoris

Answer 4

Origin: greater trochantar
Insertion: tibial tuberosity of patellar ligament
Action: knee extension

Question 5

Vastus Intermedius of Quadriceps Femoris

Answer 5

Origin: shaft of femur (anterior)
Insertion: tibial tuberosity of patellar ligament
Action: knee extension

Question 6

Vastus Medialis of Quadriceps Femoris

Answer 6

Origin: shaft of femur (medial)
Insertion: tibial tuberosity of patellar ligament
Action: knee extension

Question 7

Adductor Brevis

Answer 7

Origin: pubis
Insertion: linea aspera of femur
Action: hip adducion

Question 8

Adductor Longus

Answer 8

Origin: pubis
Insertion: linea aspera of femur
Action: hip adduction

Question 9

Adductor Magnus

Answer 9

Origin: pubis
Insertion: linea aspera of femur
Action: hip adduction

Question 10

Gracillis

Answer 10

Origin: pubis
Insertion: tibia
Action: hip adduction, knee flexion

Question 11

Gluteus Maximus

Answer 11

Origin: Illium, iliac crest, and sacrum
Insertion: gluteal tuberosity
Action: hip extension

Question 12

Gluteus Medius

Answer 12

Origin: illium
Insertion: greater trochantar
Action: hip abduction

Question 13

Gluteus Minimis

Answer 13

Origin: illium
Insertion: greater trochantar
Action: hip abduction

Question 14

Tensor Fascia Latae

Answer 14

origin: illiac crest
Insertion: head of fibula
Action: hip extension, knee flexion

Question 15

Long Head of Biceps Femoris

Answer 15

Origin: ischial tuberosity
Insertion: head of fibula
Action: hip extension, knee flexion

Question 16

Short Head of Biceps Femoris

Answer 16

Origin: linea aspera
Insertion: head of fibula
Action: hip extension, knee flexion

Question 17

Semimembranosus

Answer 17

Origin: ischial tuberosity
Insertion: medial condyle of tibia
Action: hip extension, knee flexion

Question 18

Semitendinosus

Answer 18

Origin: ischial tuberosity
Insertion: near medial condyle of tibia
Action: hip extension, knee flexion

Question 19

Gastrocnemius

Answer 19

Origin: near femoral condyle
Insertion: calcaneus via achilles tendon
Action: plantarflexion

Question 20

Soleus

Answer 20

Origin: posterior tibia and fibula
Insertion: calcaneus via achilles tendon
Action: plantarflexion

Question 21

Tibialis Posterior

Answer 21

Origin: posterior tibia
Insertion: plantar surface of foot
Action: plantarflexion, inversion

Question 22

Flexor Digitorum Longus

Answer 22

Origin: near lateral condyle of tibia
Insertion: plantar surface of digits 2-5
Action: flexion of digits

Question 23

Flexor Hallux Longus

Answer 23

Origin: fibula
Insertion: plantar surface of 1st digit
Action: flexion of hallux

Question 24

Tibialis Anterior

Answer 24

Origin: near lateral condyle of tibia
Insertion: dorsal surface of foot
Action: dorsiflexion, inversion

Question 25

Extensor Digitorum Longus

Answer 25

Origin: near lateral condyle of tibia
Insertion: dorsal surface of digits 2-5
Action: extension of digits

Question 26

Extensor Hallucis Longus

Answer 26

Origin: Fibula
Insertion: dorsal surface of 1st digit
Action: extension of hallux

Question 27

Fibularis Longus

Answer 27

Origin: fibula
Insertion: plantar surface of foot
Action: plantarflexion

Question 28

Fibularis Brevis

Answer 28

Origin: fibula
Insertion: plantar surface of foot
Action: plantarflexion