A manual for the College of Surgeons in London, Dublin, and Edinburgh: intended for the use of candidates for examinations and practitioners / [John Steggall].
- Steggall, John, 1795?-1871.
- Date:
- 1839
Licence: Public Domain Mark
Credit: A manual for the College of Surgeons in London, Dublin, and Edinburgh: intended for the use of candidates for examinations and practitioners / [John Steggall]. Source: Wellcome Collection.
61/788 page 51
![THE OS CALCIS. 5] The neck is the most contracted part of the bone, placed in front of the body and behind the head; it is exceed- ingly rough and porous for the transmission of vessels, and is not marked by any articular surface; the head of the astragalus is placed in front of the neck, directed obliquely forwards and inwards; it is marked anteriorly by an oblong articular surface, which is received into the os naviculare in front, and is prolonged inferiorly into an articular surface, which is supported by the calcaneo- navicular ligament. The astragalus articulates with four bones: the tibia above and internally, the fibula exter- nally, the os calcis inferiorly, and the os naviculare an- teriorly. No muscle is attached to this bone. The Os Calcis is the largest bone of the tarsus, placed between the astragalus, which is superior, and the os cu- boides, anterior to it, so situated as to support nearly the whole weight of the body. It presents a large projection posteriorly, named the tuberosity or heel. The particular parts to be noticed are the following: two large articu- lating surfaces for the astragalus ; the smaller of the two is anterior, inferior, and more internal, and rests upon a part which is by some named sustentaculum or small tuberosity. At the under surface of the bone and poste- riorly are two tubercles, the inner one larger; on the outer surface there is a prominent tubercle, which gives attachment to the perpendicular ligament: the inner surface of the bone is concave, forming an arch for the passage of vessels, nerves, and tendons to the foot: anteriorly there is a large cartilaginous surface for arti- culation with the os cuboides. The os calcis is arti- culated with only two bones, viz. the astragalus and os _cuboides.](https://iiif.wellcomecollection.org/image/b29302535_0061.jp2/full/800%2C/0/default.jpg)
