Osteological memoirs. No. I. The clavicle / by John Struthers.

  • John Struthers
Date:
1855
Catalogue details

Licence: Public Domain Mark

Credit: Osteological memoirs. No. I. The clavicle / by John Struthers. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    pierced near the outer end by vascular foramina, and unoccu- pied. The whole of this space is not greater than that occupied by the conoid and trapezoid impressions, which may be said to occupy more than a third of the space presented by the under surface of the outer third of the clavicle. The other part is in front of the conoid and internal to the trapezoid mark, between them and the anterior border, and has its narrow end externally and in front. In front of the conoid tubercle it is usually smooth and concave and longitudinally grooved, being the outer part of the subclavian groove, and receives the insertion of the outer end of the subclavius muscle. The part next the anterior border is less smooth, and flat and irregular. It is a narrow unoccupied space (anterior unoccupied space) from £ to ^ inch in breadth, between the attachment of the subclavius muscle and outer part of the trapezoid ligament behind, and the anterior border in front. Internal or Cylindrical Portion. This, as already defined, embraces the internal two-thirds of the clavicle. It is curved in the opposite direction to the outer third, the convexity forwards; and is thick or at least not flat- tened, and somewhat irregular looking. The true form of this portion is not at first very apparent. How many surfaces and borders has it, and what is their position and direction ? These questions may be easily answered as regards any one specimen, especially if it be a muscular one, but the description will not apply to all; some appear to have four distinct surfaces and borders, some three, and some only two. Still, the examination of a series of specimens, and of the muscular relations, will show that there is a primary or typical form, and the varieties then become easily understood. The arrangement is this—a well marked specimen is quadrangular, or square shaped; what are borders in the outer third have now become broadened or flattened into surfaces; each border, anterior and posterior, ap- parently dividing into two, an upper and lower division, so as to include an anterior and posterior surface; whilst the two surfaces of the tabular portion, are continued along, still as superior and inferior surfaces, but diminished in breadth. The flattening of u