Posterior Compartment & Plantar Surface of Foot

Question 1

Gastrocnemius Lateral Head Origin

Answer 1

Lateral aspect of lateral condyle of femur

Question 2

Gastrocnemius Medial Head origin

Answer 2

Popliteal surface of femur superior to medial condyle

Question 3

Gastrocnemius Insertion

Answer 3

Posterior surface of calcaneus via calcaneal tendon (Achilles)

Question 4

Gastrocnemius Action

Answer 4

Plantarflexes ankle when knee is extended; raises heel during walking; flexes leg at knee joint

Question 5

Gastrocnemius Innervation

Answer 5

Tibial nerve (S1,S2)

Question 6

Soleus Origin

Answer 6

Posterior aspect of head and superior 1/4 of posterior surface of fibula; soleal line and middle 1/3 of medial border of tibia; tendinous arch between bony attachments

Question 7

Soleus Insertion

Answer 7

Posterior surface of calcaneus via calcaneal tendon (Achilles)

Question 8

Soleus Action

Answer 8

Plantarflexes ankle independent of position of knee; steadies leg on foot

Question 9

Soleus Innervation

Answer 9

Tibial nerve (S1,S2)

Question 10

Plantaris Origin

Answer 10

Inferior end of lateral supracondylar line of femur; oblique popliteal ligament

Question 11

Plantaris Insertion

Answer 11

Posterior surface of calcaneus via calcaneal tendon (Achilles)

Question 12

Plantaris Action

Answer 12

Weakly assists gastrocnemius in plantarflexing ankle

Question 13

Tibialis Posterior Origin

Answer 13

Interosseous membrane; posterior surface of tibia inferior to soleal line; posterior surface of fibula

Question 14

Tibialis Posterior Insertion

Answer 14

Tuberosity of navicular, cuneiform, cuboid, and sustentaculum tali of calcaneus; bases of 2nd, 3rd, and 4th metatarsals

Question 15

Tibialis Posterior Action

Answer 15

Plantarflexes ankle; inverts foot

Question 16

Tibialis Posterior Innervation

Answer 16

Tibial nerve (L4,L5)`

Question 17

Flexor Digitorum Longus Origin

Answer 17

Medial part of posterior surface of tibia inferior to soleal line; by a broad tendon to fibula

Question 18

Flexor Digitorum Longus Insertion

Answer 18

Bases of distal phalanges of lateral four digits

Question 19

Flexor Digitorum Longus Action

Answer 19

Flexes lateral four digits; plantarflexes ankle; supports longitudinal arches of foot

Question 20

Flexor Digitorum Longus Innervation

Answer 20

Tibial Nerve (S2,S3)

Question 21

Flexor Hallucis Longus Origin

Answer 21

Inferior 2/3 of posterior surface of fibula; inferior part of interosseous membrane

Question 22

Flexor Hallucis Longus Insertion

Answer 22

Base of distal phalanx of great toe

Question 23

Flexor Hallucis Longus Action

Answer 23

Flexes great toe at all joints; weakly plantarflexes ankle; supports medial longitudinal arch of foot

Question 24

Flexor Hallucis Longus Innervation

Answer 24

Tibial nerve (S2,S3)

Question 25

Abductor Hallucis Action

Answer 25

Abducts and flexes 1st digit

Question 26

Abductor Hallucis Innervation

Answer 26

Medial Plantar nerve (S2,S3)

Question 27

Abductor Digiti Minimi Action

Answer 27

Abducts and flexes the little toe

Question 28

Abductor Digiti Minimi Innervation

Answer 28

Lateral Plantar Nerve (S2,S3)

Question 29

Flexor digitorum brevis action

Answer 29

Flexes lateral four digits

Question 30

Flexor digitorum brevis innervation

Answer 30

Medial plantar nerve (S2,S3)

Question 31

Quadratus plantae Action

Answer 31

Assists flexor digitorum longus in flexing lateral four digits

Question 32

Quadratus plantae Innervation

Answer 32

Lataral plantar nerve (S2,S3)

Question 33

Lumbricals Action

Answer 33

Flex proximal phalanges; extend middle and distal phalanges of lateral four digits

Question 34

Lumbrical Innervation

Answer 34

Medial 1: Medial Plantar nerve (S2,S3) Lateral 3: Lateral Plantar nerve (S2,S3)

Question 35

Flexor Hallucis Brevis Action

Answer 35

Flexes proximal phalanx of 1st digit

Question 36

Flexor Hallucis Brevis Innervation

Answer 36

Medial Plantar Nerve (S2,S3)

Question 37

Flexor Digit Minimi Action

Answer 37

Flexes proximal phalanx of 5th digit

Question 38

Flexor Digit Minimi Innervation

Answer 38

Superficial branch of lateral plantar nerve (S2,S3)

Question 39

Adductor Hallucis Action

Answer 39

Adducts 1st digit; assists in transverse arch or foot by moving metatarsals medially

Question 40

Adductor Hallucis Innervation

Answer 40

Deep branch of lateral plantar nerve (S2,S3)

Question 41

Plantar Interossei Action

Answer 41

Adduct digits 3-5 and flex MTP joints

Question 42

Plantar Interossei Innervation

Answer 42

Lataral plantar nerve (S2,S3)

Question 43

Dorsal Interossei Action

Answer 43

Abducts digits 2-4 and flex MTP joints