On the myology of the sciuromorphine and hystricomorphine rodents / by F.G. Parsons.
- Frederick Gymer Parsons
- Date:
- 1894
Licence: Public Domain Mark
Credit: On the myology of the sciuromorphine and hystricomorphine rodents / by F.G. Parsons. 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.
13/48 page 261
![In the Chinchillidse the muscles are largely attached to the clavicle. In the Dasyproctidm the scapulo-clavicularis is especially well developed, being considerably larger than the supraspinatus. In the Caviida) the small clavicle is between the two muscles in Cavia coba;/a, having both attached to it; hut in Ceredon rupestris the subclavius was found to send a few fibres into the clavicle and a few into the scapulo-clavicularis, but its insertion was chiefly into the anterior border of the acromial process. The scapulo- clavicularis rose chiefly from the clavicle. In the Sciuromorpha the subclavius had the usual human attach- ments, but the scapulo-clavicularis was absent in all the animals examined. It is interesting to notice that the Dipodidte, so far as this muscle is concerned, differ from all the rest of the Tlystrico- morpha. The nerve-supply of both parts of this muscle is from a branch from the upper part of the outer cord of the plexus, corresponding to the human nerve to the subclavius. Fig. 2. Shoulder-muscles of Ceredon rwpestris. 1. Deltoid (clavicular). 2. „ (acromial). 3. „ (spinous). 4. Levator clav. (cut). 5. Trapezius (cut). 6. Subclavius. 7. Clavicle. 8. Acromion and metacromion. Deltoid.—The deltoid in Rodents consists of three parts, which are liable to become more or less fused with one another. The first part rises from the outer part of the clavicle, the second from the acromial and raetacromial processes, while the third part Proc. Zool. Soc.—1894, No. XVIII. 18 [11]](https://iiif.wellcomecollection.org/image/b2238635x_0015.jp2/full/800%2C/0/default.jpg)
