Leg Muscles PIANOS

Question 1

Anterior Tibialis mm

Answer 1

Origin: lateral tibial condyle, interosseous membrane
Insertion: base of first metatarsal, medial cuniform
Action: Foot DF+ INV
Nerve: Deep fibular (VR L4-S3)
Perfusion: anterior tibial aa/vv

Question 2

Extensor Hallucis Longus mm (EHL)

Answer 2

Origin: Fibula, Interosseous membrane
Insertion: first extensor expansion hood
Action: Food DF; EXT 1st MTP, IP
Nerve: Deep fibular (VR L4-S3)
Perfusion: anterior tibial aa/vv

Question 3

Extensor Digitorum Longus mm (EDL)

Answer 3

Origin: lateral tibial condyle, interosseous membrane
Insertion: #2-5 extensor expansion hood
Action: Foot DF, EXT 2-5 MTP, PIP, DIP
Nerve: Deep fibular (VR L4-S3)
Perfusion: anterior tibial aa/vv

Question 4

Fibularis tertius mm

Answer 4

Origin: Fibula, Interosseous membrane
Insertion: Base of 5th metatarsal
Action: Foot DF+ EV
Nerve: Deep fibular (VR L4-S3)
Perfusion: anterior tibial aa/vv

Question 5

Fibularis Longus mm

Answer 5

Origin: fibular head
Insertion: base of first metatarsal, medial cuneiform
Action: Foot EV + PF
Nerve: Superficail fibular (VR L4-S3)
Perfusion: fibular aa/vv

Question 6

Fibularis Brevis mm

Answer 6

Origin: fibula, interosseous membrane
Insertion: base of 5th metatarsal
Action: Foot EV + PF
Nerve: Superficail fibular (VR L4-S3)
Perfusion: fibular aa/vv

Question 7

Popliteus mm

Answer 7

Origin: lateral condyle of femur, oblique popliteal ligament, lateral meniscus
Insertion: posterior tibia
Action: unlock knee
Nerve: Tibial (VR L4-S3)
Perfusion: popliteal aa/vv

Question 8

Gastrocnemius (medial/lateral head) mm

Answer 8

Origin: lateral and medial femoral condyles
Insertion: posterior aspect of calcaneus via calcaneus (achilles tendon)
Action: leg FLX; foot PF
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv

Question 9

Soleus mm

Answer 9

Origin: fibular head, soleal line of tibia
Insertion: posterior aspect of calcaneus via calcaneus (achilles tendon)
Action: foot PF
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv

Question 10

Plantaris mm

Answer 10

Origin: lateral supracondylar line of tibia
Insertion: posterior aspect of calcaneus via calcaneus (achilles tendon)
Action: Leg FLX; foot PF
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv

Question 11

Posterior tibialis mm

Answer 11

Origin: interosseous membrane, upper tibia and fibula
Insertion: navicular tuberosity, three cuneiforms, cuboid bone, bases of metatarsals 2-4, sustentalculum tali
Action: foot PF + INV
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv

Question 12

Flexor digitorum Longus mm (FDL)

Answer 12

Origin: posterior tibia
Insertion: distal phalanges 2-5
Action: foot PF; FLX 2-5 MTP, PIP, DIP
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv

Question 13

Flexor Hallucis Longus mm (FHL)

Answer 13

Origin: fibula, interosseous membrane
Insertion: first distal phalanx
Action: foor PF’ FLX 1st MTP and IP
Nerve: Tibial (VR L4-S3)
Perfusion: posterior tibial aa/vv