. Cunningham's Text-book of anatomy. Anatomy. THE CLAVICLE. 199. Fig. 187.—The Under Surface of the Right Clavicle with the Attachments of the Muscles mapped out. upper and anterior fibres of the trapezius muscle. The inferior surface, in- clined downwards and backwards, is marked close to the sternal end by an irregular elongated impression (tuberositas ^v** costalis), often deeply pitted, for the attach- ment of the costo- clavicular ligament, which unites it to the cartilage of the first rib. Lateral to this the shaft is channelled by a groove which terminates close to the coracoid impressi
. Cunningham's Text-book of anatomy. Anatomy. THE CLAVICLE. 199. Fig. 187.—The Under Surface of the Right Clavicle with the Attachments of the Muscles mapped out. upper and anterior fibres of the trapezius muscle. The inferior surface, in- clined downwards and backwards, is marked close to the sternal end by an irregular elongated impression (tuberositas ^v** costalis), often deeply pitted, for the attach- ment of the costo- clavicular ligament, which unites it to the cartilage of the first rib. Lateral to this the shaft is channelled by a groove which terminates close to the coracoid impression; into this groove the subclavius muscle is inserted. The acromial end of the bone is flattened and compressed from above down- wards, and expanded from before backwards; its anterior edge is sharp and well defined, and gives attachment to the deltoid muscle, which also spreads over part of its upper surface. Its posterior margin is rougher and more tubercular, and provides a surface for the insertion of the trapezius. The area between these two muscular attachments is smooth and subcutaneous. The lateral edge of this forward-turned part of the bone is provided with an oval facet (facies articularis acromialis) for articulation with the acromion of the scapula; the margins around this articular area serve for the attachment of the capsule of the joint. The inferior surface of the acromial end of the bone is traversed obliquely from behind forwards and laterally by a rough ridge or line called the trapezoid ridge. The posterior extremity of this ridge, as it abuts on the posterior border of the bone, forms a prominent process, the tuberositas coracoidea; to each of these, respectively, are attached the trapezoid and conoid portions of the coraco- clavicular ligament. The morphology of the clavicle is of special interest. Its presence is associated with the freer use and greater range of movement of the fore-limb, such as are necessary for its employment for more specialised
Size: 2952px × 847px
Photo credit: © Central Historic Books / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1914
