Posterior Lower Leg POINAS

Question 1

Gastrocnemius MA

Answer 1

• Ankle plantar flexion when knee is extended
• raises heel during walking
• knee flexion

Question 2

Gastrocnemius PA

Answer 2

Medial head: popliteal surface of femur
Lateral head: Lateral femoral condyle

Question 3

Gastrocnemius DA

Answer 3

Calcaneus
via calcaneal / achilles tendon

Question 4

Gastrocnemius N

Answer 4

Tibial nerve S1, S2

Question 5

Soleus MA

Answer 5

• Ankle plantar flexion independent of knee position
• Ankle stabilizaiton

Question 6

Soleus PA

Answer 6

• posterior fibula
• soleal line and medial tibia
• tendious arch between the bony attachments

Question 7

Soleus DA

Answer 7

Calcaneus
via calcaneal / achilles tendon

Question 8

Soleus N

Answer 8

Tibial nerve S1, S2

Question 9

Plantaris MA

Answer 9

weakly assists gastrocnemius with ankle plantar flexion

Question 10

Plantaris PA

Answer 10

• Lateral supracondylar ridge of femur
• Oblique popliteal ligament

Question 11

Plantaris DA

Answer 11

Calcaneus
via calcaneal / achilles tendon

Question 12

Plantaris N

Answer 12

Tibial nerve S1, S2

Question 13

Popliteus MA

Answer 13

Unlocks knee by rotating femur 5 degrees on fixed tibia
- Medially rotates tibia of unplanted limb

Question 14

Popliteus PA

Answer 14

• Lateral condyle of femur
• Lateral meniscus

Question 15

Popliteus DA

Answer 15

Posterior tibia, above soleal line

Question 16

Popliteus N

Answer 16

Tibial nerve L4, L5, S1

Question 17

Flexor Hallucis Longus MA

Answer 17

Great toe Flexion @ all joints

• weak ankle plantar flexion
• supports medial longitudinal arch

Question 18

Flexor Hallucis Longus PA

Answer 18

Lower posterior surface of fibula
- Interossesous membrane

Question 19

Flexor Hallucis Longus DA

Answer 19

Base of distal phalanx of great toe

Question 20

Flexor Hallucis Longus N

Answer 20

Tibial nerve S2, S3

Question 21

Flexor Digitorum Longus MA

Answer 21

Digits 2-5 flexion
- ankle plantarflexion
- supports longitudinal arches

Question 22

Flexor Digitorum Longus PA

Answer 22

Posterior tibia, inferior to soleal line
By a broad tendon to fibula

Question 23

Flexor Digitorum Longus DA

Answer 23

Bases of distal phalanges of digits 2-5

Question 24

Flexor Digitorum Longus N

Answer 24

Tibial nerve S2, S3

Question 25

Tibialis Posterior MA

Answer 25

- ankle plantar flexion - foot inversion - maintains medial longitudinal arch

Question 26

Tibialis Posterior PA

Answer 26

Interosseous membrane - Posterior tibia, inferior to soleal line - Posterior surface of fibula *attaches to all 3 structures of lower leg

Question 27

Tibialis Posterior DA

Answer 27

Tuberosity of navicular - Cuneiforms - Cuboid - Sustentaculum tali of calcaneus - Bases of 2nd, 3rd, and 4th metatarsals

Question 28

Tibialis Posterior N

Answer 28

Tibial nerve L4, L5