Posterior Leg and Ankle

Question 1

gastrocnemius O

Answer 1

lateral head - lateral aspect of lateral condyle of femur

medial head - popliteal surface of femur, superior to medial condyle

Question 2

gastrocnemius I

Answer 2

posterior surface of calcaneus via calcaneal tendon

Question 3

gastrocnemius innervation

Answer 3

tibial nerve S1,S2

Question 4

gastrocnemius action

Answer 4

plantarflexes ankle when knee is extended
raises heel during walking
flexes knee joint

Question 5

soleus O

Answer 5

posterior aspect of head of fibula
superior quarter of posterior surface of fibula
soleal line
medial border of tibia

Question 6

soleus I

Answer 6

posterior surface of calcaneus via calcaneal tendon

Question 7

soleus innervation

Answer 7

tibial nerve S1,S2

Question 8

soleus action

Answer 8

plantarflexes ankle

steadies leg on foot

Question 9

plantaris O

Answer 9

inferior end of lateral supracondylar line of femur

oblique popliteal ligament

Question 10

plantaris I

Answer 10

Calcaneal tuberosity

Question 11

plantaris innervation

Answer 11

tibial nerve S1,S2

Question 12

plantaris action

Answer 12

weakly asists gastrocenmius in plantarflexing ankle

funtion is probably mainly proprioceptive

Question 13

flexor digitorum longus O

Answer 13

medial part of posterior surface of tibia inferior to soleal line and by a broad tendon of fibula

Question 14

flexor digitorum longus I

Answer 14

bases of distal phalanges of lateral four digits

Question 15

flexor digitorum longus innervation

Answer 15

tibial nerve S2,S3

Question 16

flexor digitorum longus action

Answer 16

flexes lateral four digits
plantarflexes ankle
supports longitudinal arches of foot

Question 17

flexor hallucis longus O

Answer 17

inferior 2/3 of posterior surface of fibula

inferior part of interosseous membrane

Question 18

flexor hallucis longus I

Answer 18

base of distal phalanx of great toe (hallux)

Question 19

flexor hallucis longus innervation

Answer 19

tibial nerve S2,S3

Question 20

flexor hallucis longus action

Answer 20

flexes great toe at all joints
weakly plantar flexes ankle
supports medial longitudinal arch of the foot

Question 21

tibialis posterior O

Answer 21

interosseous membrane
posterior surface of tibia
inferior to soleal line
posterior surface of fibula

Question 22

tibialis posterior I

Answer 22

primarily to tuberosity of navicualr
also to cuneiforms
cuboid
bases of 2nd-4th metatarsals

Question 23

tibilais posterior innervation

Answer 23

tibials nerve L4,L5

Question 24

tibialis posterior action

Answer 24

plantar flexes ankle
inverts foot
supports medial longitudinal arch of foot

Question 25

popliteus O

Answer 25

lateral surface of lateral condyle of femur and lateral meniscus (intra-articular, within cavity of knee joint)

Question 26

popliteus I

Answer 26

posterior surface of tibia | superior to soleal line

Question 27

popliteus innervation

Answer 27

tibial nerve L4,L5,S1

Question 28

popliteus action

Answer 28

weakly flexes knee and unlocks it by laterally rotating femur on felxed tibia may also medially rotate tibia of unplanted limb