222 



ANATOMY IN A XITSHELL. 



of the tibia and the fibula just above the malleoli and binds down the extensor 

 tendons as they descend on the front of the tibia and fibula. The inferior 

 portion begins on the outer side of the calcaneum and divides into two layers 

 at the outer border of the Peroneus tertius, one passing in front, the other be- 

 hind ami at the inner border of the Extensor longus digitorum these layers 

 mute thus forming a canal through which these muscles pass. This inferior 

 portion of the anterior annular ligament now divides into two branches one of 

 which passes upward to be inserted in the front of the internal malleolus and 

 the other passes across to be inserted on the scaphoid and internal cuneiform 

 bon< s and the plantar fascia. The tendon of the Tibialis anticus has a synovial 



PLATE LXXXYI 



EXPANSION FROM QUADRICEPS EXTENSOR TENDON 



ANTERIOR CRUCIAL 



POSTERIOR CRUCIAL LIGAMENT 



EXTERNAL LATERAL LIGAMENT 



Semilunab Fibro-Cartjlage of Knee-Joint. 



-heath in the superior portion of the anterior annular ligament and also one in 

 the upper limb of the inferior portion, but is passes under the lower limb of 

 the inferior portion. 



| The external annular Ligament runs from the extremity of the outer malleo- 

 lus to the outer side of the os calcis binding down the Peroneus longus and 

 Peroneus brevis, which are enclosed in a single synovial membrane. 



The internal annular Ligament (Plate LXIX.) passes from the internal 

 malleolus to the internal margin of the os calcis. It thus makes the grooves 

 over which it passes into canals for the passage of the tendons of the flexor 

 muscles and vessels into the sole of the foot. It joins the deep fascia of the leg 

 above and the plantar fascia below at the origin of the Abductor hallucis. It 

 has three canals which from within outward transmit (1) the Tibialis posticus, 

 ■ udon of the Flexor longus digitorum, then the posterior tibial vessels 

 and nerve, (3) the tendon of the Flexor longus hallucis. Each of these canals 

 is lined by synovial m< mbrane. 



