Origins and Insertions

Question 1

Gluteus Maximus

Answer 1

Origin: ilium (posterior gluteal line and crest), sacrum, and coccyx, aponeurosis of erector spinae
Insertion: Iliotibial tract and gluteal tuberosity

Question 2

Gluteus medius

Answer 2

O: Ilium between posterior and inferior anterior gluteal lines
I: Oblique ridge on lateral surface of greater trochanter

Question 3

Gluteus minimus

Answer 3

O: Ilium between anterior and inferior gluteal lines and margin of greater sciatic notch
I: Anterior border of grater trochanter

Question 4

Piriformis

Answer 4

O: pelvic surface of sacrum, capsule of SI joint
I: Superior border of greater trochanter

Question 5

Obturator internus

Answer 5

O: pelvic surface of obturator membrane and margin of obturator foramen, pelvic surface of ischial ramus, inferior pubic ramus
I: Medial surface of greater trochanter

Question 6

Superior gemellus

Answer 6

O: ischial spine
I: Medial surface of greater trochanter

Question 7

Inferior gemellus

Answer 7

O: proximal part of ischial tuberosity
I: Medial surface of greater trochanter

Question 8

Quadratus Femoris

Answer 8

O: proximal part of lateral border of ischial tuberosity
I: Quadrate tubercle

Question 9

Pectineus

Answer 9

O: pectin pubis

I; Shaft of femur on line from lesser trochanter to linea aspera

Question 10

TFL

Answer 10

O: outer lip of iliac crest, ASIS
I: Proximal medial surface of tibial shaft distal to tibial condyle

Question 11

Rectus femoris

Answer 11

O: AIIS, acetabulum, and capsule of hip joint
I: base of patella

Question 12

Adductor longus

Answer 12

O: pubis
I: middle 1/3 of medial lip of linea aspera

Question 13

Adductor brevis

Answer 13

O: inferior ramus and body of pubis
I: along line from lesser trochanter to proximal 1/3 of medial lip of linea aspera

Question 14

Adductor magnus

Answer 14

O: inferior pubic ramus, inferior ramus of ischium, ischial tuberosity
I: linea aspera, medial supracondylar line

Question 15

Gracillis

Answer 15

O: Inferior pubic ramus
I: Medial surface of tibial shaft below tibial condyle

Question 16

Obturator externus

Answer 16

O: pubic ramus, ischial ramus, margins of obturator foramen
I: Trochanteric fossa

Question 17

Semitendinosus

Answer 17

O: ischial tuberosity
I: medial side of proximal tibial shaft

Question 18

Semimembranosus

Answer 18

O: Ischial tuberosity
I: medial condyle of tibia

Question 19

Biceps femoris

Answer 19

O: Ischial tuberosity, sacrotuberous ligament
I: fibular head, lateral tibial condyle

Question 20

Tibialis anterior

Answer 20

O: lateral tibial condyle, proximal 2/3 of lateral shaft of tibia
I: Medial cuneiform and base of 1st metatarsal

Question 21

Extensor hallucis longus

Answer 21

O: medial aspect of middle shaft of fibula
I: base of dorsal surface of distal phalanx of great toe, expansion to base of proximal phalanx of great toe

Question 22

Extensor digitorum longus

Answer 22

O: lateral condyle of tibia, upper 3/4 of medial shaft of fibula
I: four tendinous slips tot he dorsum of toes 2-5

Question 23

Fibularis tertius

Answer 23

O: distal 1/3 of medial fibula
I: dorsum of base of 5th metatarsal

Question 24

Fibularis longus

Answer 24

O: head and upper 2/3 of fibula
I: plantar aspect of base of 1st metatarsal, plantar aspect of medial cuneiform

Question 25

Fibularis brevis

Answer 25

O: distal 2/3 of fibula I: tuberosity of 5th metatarsal

Question 26

Gastrocnemius

Answer 26

O: medial and lateral femoral condyle I: calcaneus

Question 27

Soleus

Answer 27

O: fibular head and proximal 1/3 of posterior fibula, soleal line and middle 1/3 of medial tibial shaft I: calcaneus

Question 28

Plantaris

Answer 28

O: lateral aspect of subrandcondylar line of femur I: calcaneus

Question 29

Popliteus

Answer 29

O: lateral condyle of femur, capsule of knee joint, lateral meniscus I: posterior surface of tibia above soleal line

Question 30

Flexor hallucis longus

Answer 30

O: Inferior 2/3 of posterior shaft of fibula I: Plantar surface of base of the distal phalanx of great toe

Question 31

Flexor digitorum longus

Answer 31

O: Posterior surface of middle 2/3 of tibia I: plantar surface of the base of the distal phalanx of toes 2/5

Question 32

Tibialis posterior

Answer 32

O: posterior tibia inferior to soleal line, proximal 2/3 of posterior fibula and fibular head I: tuberosity of navicular bone, 3 cuneiform bones, cuboid, bases of metatarsals 2-4

Question 33

Abductor hallucis

Answer 33

O: medial process of tuberosity of calcaneus I: medial side of base of proximal phalanx of great toe

Question 34

Flexor digitorum brevis

Answer 34

O: medial process of tuberosity of calcaneus I: 4 digits- both sides of middle phalanges of toes 2-5

Question 35

Abductor digiti minimi

Answer 35

O: medial and lateral processes of tuberosity of calcaneus I: lateral side of base of proximal phalanx of 5th toe

Question 36

Quadratus plantae

Answer 36

O: lateral border of plantar surface of calcaneus and lateral border of long plantar ligament (lateral) and medial border of calcaneus (medial) I: lateral margin of tendon of flexor digitorum longus

Question 37

Lumbricals

Answer 37

O: first originates by a single head from the medial side of the tendon of the flex dig long bound for the 2nd toe. The 2-4 originate by double heads from the adjacent sides of flex dig long tendons bound for toes 3,4,5 I: proximal phalanges and dorsal expansions of the tendons of the ext dig longus for toes 2-5

Question 38

Flexor hallucis brevis

Answer 38

O: medial part of plantar surface of cuboid and cuneiform and tendon of tibialis posterior I: both sides of base of proximal phalanx of great toe

Question 39

Adductor hallucis

Answer 39

O: bases of metatarsals 2-4 (oblique) and plantar metatarsophalangeal ligaments of toes 3-5 (transverse) I:lateral side of base of proximal phalanx of 1st digit (oblique) and lateral sesamoid of hallus (transverse)

Question 40

Flexor digit minimi brevis

Answer 40

O: base of plantar surface of 5th metatarsal I: Base of proximal phalanx of toe 5

Question 41

Plantar interossei (3)

Answer 41

O: bases and medial sides of metatarsal 3-5 I: medial sides of bases of proximal phalanges of same toes

Question 42

Dorsal interossei (4)

Answer 42

O: metatarsal bones I: first into the medial side of proximal phalanx of 2nd digit, 2-4 into lateral side of proximal phalanges of toes 2-4. All insert into the tendons of the extensor digitorum longus