Anatomy of foot

Question 1

Where does the perforating branch of the peroneal a. pierce through the interossesous ligament to the anterior ankle?

Answer 1

pierces interosseous membrane ~ 5 cm above lateral malleolus as perforating branch and communicates with the anterior lateral malleolar artery

Question 2

what arterial branch supplies perfusion to the lateral flap associated with a standard extensile approach for calcaneal fractures

Answer 2

lateral calcaneal branch. of the peroneal A

Question 3

what tendon goes through the sesamoids and what is its biomechanical role?

Answer 3

FHB ;provide fulcrum for flexor hallucis brevis that increases MTP flexion power

Question 4

attachments to sesamoids

Answer 4

FHB attaches to both tibial and fibular sesamoid
sesamoids are connected to each other by intersesamoid ligament and plantar plate
abductor hallucis is connected to tibial sesamoid
adductor hallucis is connected to fibular sesamoid

Question 5

where does the peroneal artery originate/branch off of

Answer 5

posterior tibial artery

Question 6

which artery is the dominant artery for talar body blood supply

Answer 6

artery of tarsal canal

Question 7

2nd layer of the plantar foot

Answer 7

Muscles
quadratus plantae
lumbrical muscles

Tendons
flexor digitorum longus (FDL)
flexor hallucis longus (FHL)

Neurovascular structures
medial and lateral plantar arteries

Question 8

4th layer of the plantar foot

Answer 8

Deepest layer
Muscles
dorsal interosseous
plantar interosseus

Tendons
peroneus longus
tibialis posterior
both tendons travel to their insertion point via fibro-osseus tunnels

Question 9

attachments to 1st metatarsal

Answer 9

Three muscles attach the first metatarsal bone: the tibialis anterior, peroneus longust and first dorsal interosseus

Question 10

Where do the tendons of the FDB split

Answer 10

at the base of the proximal phalanx 2-5