202 



OSTEOLOGY. 



GLENOID 



CAVITY 



ligament, Whilst at ACROMION CLAVICULAR ARTICULAR 



its extremity and towards CORACOID PROCESS 



the front of its ventral 



border, is the combined 



origin of. the biceps and 



coracobrachialis, together 



with the insertion of the 



pectoralis minor. The col- 



lum scapulae (neck) is that 



somewhat constricted part 



of the bone which supports 



the head ; it corresponds in 



front and behind to a line 



drawn from the scapular 



notch to the infra-glenoidal 



tuberosity. 



The body of the bone 

 has two surfaces, a dorsal 

 (facies dorsalis) and a costal 

 (fades costalis). The former 

 is divided into two fossse by 

 an outstanding process of 

 triangular form, called the 

 spina scapulae. The at- 

 tached border of this crosses 

 the dorsal surface of the body obliquely in a direction 



CORACOBRACHIALIS AND 



SHORT HEAD OF 



BICEPS PECTORALIS MINOR 



OMO-HYOID 



MKDIAL ANGLE 



NECK 



ARTERIAL FORAMEN 



LONG HEAD 

 OF TRICEPS 



SUBSCAPULAR FOSSA - 



AXILLARY BORDER 



FIG. 192. COSTAL SURFACE OF THE RIGHT SCAPULA WITH THE 

 ATTACHMENTS OF MUSCLES MAPPED OUT. 



INFERIOR ANGLE 



FIG. 191. THE RIGHT SCAPULA 

 SEEN FROM THE FRONT. ' 



laterally and slightly upwards, 

 extending from the vertebral 

 border, near the lower limit of its 

 upper fourth, towards the centre 

 of the posterior glenoid edge, 

 from which, however, it is separ- 

 ated by the great scapular notch, 

 which here corresponds to the 

 dorsal aspect of the neck. Within 

 this notch the transverse scapu- 

 lar vessels and the supra-scapular 

 nerve pass to the infra-spinous 

 fossa. The surfaces of the spine, 

 which are directed upwards and 

 down wards, are concave, the upper 

 entering into the formation of the 

 supra -spinous fossa, which lies 

 above it, the lower forming the 

 upper wall of the infra-spinous 

 fossa, which lies below it. The 

 two fossse are in communication 



