The deltoid ligament (or medial ligament of
talocrural joint) is a strong, flat, triangular band, attached, above, to the apex and anterior and posterior borders of the
medial malleolus
A malleolus is the bony prominence on each side of the human ankle.
Each leg is supported by two bones, the tibia on the inner side (medial) of the leg and the fibula on the outer side (lateral) of the leg. The medial malleolus is the promi ...
.
The deltoid ligament is composed of 4 fibers:
1. Anterior tibiotalar ligament
2. Tibiocalcaneal ligament
3. Posterior tibiotalar ligament
4. Tibionavicular ligament.
It consists of two sets of fibers, superficial and deep.
Superficial fibres
Of the superficial fibres,
* ''tibionavicular'' pass forward to be inserted into the tuberosity of the
navicular bone
The navicular bone is a small bone found in the feet of most mammals.
Human anatomy
The navicular bone in humans is one of the tarsal bones, found in the foot. Its name derives from the human bone's resemblance to a small boat, caused by th ...
, and immediately behind this they blend with the medial margin of the
plantar calcaneonavicular ligament;
* ''tibiocalcaneal'' descend almost perpendicularly to be inserted into the whole length of the
sustentaculum tali
In humans and many other primates, the calcaneus (; from the Latin ''calcaneus'' or ''calcaneum'', meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock.
S ...
of the
calcaneus
In humans and many other primates, the calcaneus (; from the Latin ''calcaneus'' or ''calcaneum'', meaning heel) or heel bone is a bone of the tarsus of the foot which constitutes the heel. In some other animals, it is the point of the hock.
...
;
* ''posterior tibiotalar'' from the posterior colliculus of the medial malleolus to the posteromedial surface of the talus
Deep fibres
The deep fibres (''anterior tibiotalar'') are attached from the anterior colliculus of the medial malleolus to the medial talus and medial tubercle
Coverings
The deltoid ligament is covered by the tendons of the
tibialis posterior
The tibialis posterior muscle is the most central of all the leg muscles, and is located in the deep posterior compartment of the leg. It is the key stabilizing muscle of the lower leg.
Structure
The tibialis posterior muscle originates on the i ...
and
flexor digitorum longus
The flexor digitorum longus muscle is situated on the tibial side of the leg. At its origin it is thin and pointed, but it gradually increases in size as it descends. It serves to flex the second, third, fourth, and fifth toes.
Structure
The fl ...
which are supplied by the tibial nerve (L4, L5, S1, S2, and S3).
Additional Images
File:Slide1CECU.JPG, Ankle joint.Deep section.
File:Slide5CEC4.JPG, Ankle joint. Deep dissection.
File:Slide6CEC5.JPG, Ankle joint. Deep dissection.
File:Slide8CEC7.JPG, Ankle joint. Deep dissection.
References
External links
*
* ()
* http://www.ithaca.edu/faculty/lahr/LE2000/ankle%20pics/5medankle-new.jpg
{{Authority control
* Thompson, Jon C. Netter's concise atlas of orthopaedic anatomy. Icon Learning Systems, 2002. 349-351
Ligaments of the lower limb
Lower limb anatomy