Lab Final Muscles

Question 1

Gluteus maximus

Answer 1

ori: iliac crest, posterior gluteal line, and lateral surface of ilium; sacrum, coccyx and thoracolumbar fascia
ins: iliotibial tract and gluteal tuberosity of femur
act: extension and lateral rotation at hip (helps stabilize extended knee) abduction at the hip-superior fibres only

Question 2

Gluteus medius

Answer 2

ori: anterior iliac crest lateral surface of ilium between posterior and anterior gluteal lines
ins: greater trochanter of femur
act: abduction and medial rotation at hip

Question 3

Gluteus minimus

Answer 3

ori: lateral surface of ilium between inferior and anterior gluteal lines
ins: greater trochanter of femur
act: abduction and medial rotation at hip

Question 4

Tensor fasciae latae

Answer 4

ori: iliac crest and lateral surface of anterior superior iliac spine
ins: iliotibial tract
act: abduction and medial rotation at hip; extension and lateral rotation at knee; tenses fasciae late, which laterally supports the knee

Question 5

Obturator externus

Answer 5

ori: lateral and medial margins of obturator foramen
ins: trochanteric fossa of femur
act: lateral rotation and abduction of hip; help maintain stability and integrity of the hip

Question 6

Obturator internus

Answer 6

ori: lateral and medial margins of obturator foramen
ins: medial surface of greater trochanter
act: lateral rotation and abduction of hip; help maintain stability and integrity of the hip

Question 7

Piriformis

Answer 7

ori: anterolateral surface of sacrum
ins: greater trochanter of femur
act: lateral rotation and abduction of hip; help maintain stability and integrity of the hip

Question 8

Superior gemellus

Answer 8

ori: ischial spine
ins: medial surface of greater trochanter vie tendon of obturator internus
act: lateral rotation and abduction of hip; help maintain stability and integrity of the hip

Question 9

Inferior gemellus

Answer 9

ori: ischial tuberosity
ins: medial surface of greater trochanter vie tendon of obturator internus
act: lateral rotation and abduction of hip; help maintain stability and integrity of the hip

Question 10

Quadratus femoris

Answer 10

ori: lateral border of ischial tuberosity
ins: intertrochanteric crest of femur
act: lateral rotation of hip

Question 11

Adductor brevis

Answer 11

ori: inferior ramus of pubis
ins: linea aspera of femur
act: adduction and flexion at hip

Question 12

Adductor longus

Answer 12

ori: inferior ramus of pubis, anterior to brevis
ins: linea aspera of femur
act: adduction, flexion, and medial rotation at hip

Question 13

Adductor magnus

Answer 13

ori: inferior ramus of pubis posterior to adductor braves and ischial tuberosity
ins: linea aspera and adductor tubercle of femur
act: whole muscle produces adduction at the hip; anterior part produces flexion and medial rotation; posterior part produces extension

Question 14

Pectineus

Answer 14

ori: superior ramus of pubis
ins: pectineal line inferior to lesser trochanter of femur
act: flexion and adduction at hip

Question 15

Gracilis

Answer 15

ori: inferior ramus of pubis
ins: medial surface of tibia inferior to medial condyle
act: flexion and medial rotation at knee; adduction and medial rotation at hip

Question 16

Iliacus

Answer 16

ori: iliac fossa
ins: femur distal to lesser trochanter; tendon fused with that of psoas major
act: flexion at hip and/or lumbar intervertebral joints

Question 17

Psoas major

Answer 17

ori: anterior surfaces and transverse processes ov vertebrae
ins: lesser trochanter
act: flexion at hip and/or lumbar intervertebral joints

Question 18

Biceps femoris

Answer 18

ori: ischial tuberosity and linea aspera of femur
ins: head of fibula, lateral condyle of tibia
act: flexion at knee; extension and rotation at hip

Question 19

Semimembranosus

Answer 19

ori: ischial tuberosity
ins: posterior surface of medial condyle of tibia
act: flexion at knee; extension and medial rotation at hip

Question 20

Semitendinosus

Answer 20

ori: ischial tuberosity
ins: proximal, medial surface of tibia
act: flexion at knee; extension and medial rotation at hip

Question 21

Sartorius

Answer 21

ori: anterior superior iliac spine
ins: medial surface of tibia near tibial tuberosity
act: flexion at knee; abduction, flexion, and lateral rotation at hip

Question 22

Popliteus

Answer 22

ori: lateral condyle of femur
ins: posterior surface of proximal tibial shaft
act: medial rotation of tibia (or lateral rotation of femur) at knee; flexion at knee

Question 23

Rectus femoris

Answer 23

ori: anterior inferior iliac spine and superior acetabular rim of ilium
ins: tibial tuberosity via quadriceps tendon, patella, and patellar ligament
act: extension at knee; flexion at hip

Question 24

Vastus intermedius

Answer 24

ori: anterolateral surface of femur and lines aspera (distal half)
ins: tibial tuberosity via quadriceps tendon, patella, and patellar ligament
act: extension at knee

Question 25

Vastus lateralis

Answer 25

ori: anterior and inferior to greater trochanter of femur and along linea aspera (proximal half) ins: tibial tuberosity via quadriceps tendon, patella, and patellar ligament act: extension at knee

Question 26

Vastus medialis

Answer 26

ori: entire length of linea aspera of femur ins: tibial tuberosity via quadriceps tendon, patella, and patellar ligament act: extension at knee

Question 27

Tibialis anterior

Answer 27

ori: lateral condyle and proximal shaft of tibia ins: base of first metatarsal bone and medial cuneiform act: dorsiflexion; inversion of foot

Question 28

Gastrocnemius

Answer 28

ori: femoral condyles ins: calcaneus via calcaneal tendon act: plantar flexion; flexion at knee

Question 29

Fibularis brevis

Answer 29

ori: midlateral margin of fibula ins: base of fifth metatarsal bone act: eversion of foot and plantar flexion

Question 30

Fibularis longus

Answer 30

ori: head and proximal shaft of fibula ins: base of first metatarsal bone and medial cuneiform act: eversion of foot and plantar flexion; supports ankle; supports longitudinal and transverse arches

Question 31

Plantaris

Answer 31

ori: lateral supracondylar ridge ins: posterior portion of calcaneus act: plantar flexion; flexion at knee

Question 32

Soleus

Answer 32

ori: head and proximal shaft of fibula, and adjacent posteromedial shaft of tibia ins: calcaneus via tendon act: plantar flexion, postural muscle when standing

Question 33

Tibialis posterior

Answer 33

ori: interosseous membrane and adjacent shafts of tibia and fibula ins: navicular, cuneiforms, cuboid, second third fourth metatarsal bones act: inversion of foot; plantar flexion

Question 34

Flexor digitorum longus

Answer 34

ori: posteromedial surface of tibia ins: inferior surface of diesel changes, toes 2-5 act: flexion of toes 2-5, plantar flexion

Question 35

Flexor hallucis longus

Answer 35

ori: posterior surface of fibula ins: inferior surface, distal phalanx of great toe act: flexion at joints of great toe, plantar flexion

Question 36

Extensor digitorum longus

Answer 36

ori: lateral condyle of tibia; anterior surface of fibula ins: superior surfaces of phalanges toes 2-5 act: extension at toes 2-5, dorsiflexion

Question 37

Extensor hallucis longus

Answer 37

ori: anterior surface of fibula ins: superior surface, distal phalanx of great toe act: extension at joints of great toe, dorsiflexion

Question 38

What muscles attach on the anterior side of the ox coxae?

Answer 38

oris: iliacus, sartorius, rectus femoris, pectineus, gracilis, adductor longus

Question 39

What muscles attach on the anterior side of the femur?

Answer 39

oris: vastus medialis, vastus lateralis, vastus intermedius ins: iliopsoas

Question 40

What muscles attach on the anterior side of the tibia?

Answer 40

oris: tibialis anterior ins: iliotibial tract, patellar ligament, gracilis, sartorius, semitendinosus

Question 41

What muscles attach on the posterior side of the ox coxae?

Answer 41

oris: soleus, tibialis posterior ins: TFL, sartorius, rectus femoris

Question 42

What muscles attach on the posterior side of the femur?

Answer 42

oris: vastus lateralis, vastur intermedius, biceps femoris, vastus medialis, gastrocnemius, plantaris ins: psoas major, pectineus, iliac, adductor longus, adductor magnus

Question 43

What muscles attach on the posterior side of the tibia?

Answer 43

ins: popliteus

Question 44

What muscles attach on the anterior side of the fibula?

Answer 44

oris: fibularis longus, fibularis brevis, extensor digitorum longus, extensor hallucis longus

Question 45

What muscles attach on the posterior side of the fibula?

Answer 45

oris: soleus, tibialis posterios, flexor hallucis longus, fibula's brevis