52 Injuries of Bone. 



macerated — showing the above injury, with a trephine opening 

 and the mark of a Hey's saw. 



The seat of injury has evidently been at the right parietal 

 eminence, where comminution exists, and whence some com- 

 minuted fragments have apparently been removed by trephin- 

 ing. From the seat of injury at the right parietal bone one 

 large fissure extends to the left beyond the middle of the left 

 parietal bone. Another fissure passes forward into the 

 coronal suture, and another descends through the back of 

 the squamous portion of the temporal bone to end in the 

 glenoid fossa. Another irregular fissure unites this with 

 the coronal suture, and a small vertical split is seen in the 

 mastoid process. The injury is one Avhich might have been 

 produced by a heavy blow upon the right parietal bone. 



G. C. 1009. 



3. 35. Severe Comminution and Fissuring* of the Skull.— 



Eight half of a skull — macerated — showing an extensive 

 fracture. 



From a patient in Middlesex Hospital. The scalp was wounded 

 over the right temple and the skull fissures radiate from this region. 



One fissure runs upwards from the temple along the coronal 

 suture, and from the lower end of the split coronal suture an 

 irregular fissure runs forward across the frontal bone to the orbit, 

 and joins other fissures there. From the same starting-point a 

 second fissure runs forwards and downwards to the roof of the 

 orbit. A third, passing downwards, gives off a branch into the 

 orbit, and then, continuing backwards, splits into two in front 

 of the ear. One of these two runs in front of the meatus to 

 reach the base, and the other, extending through the petrous 

 and mastoid parts of the temporal bone, crosses the occipital bone 

 . and ends in the foramen magnum. The bones have been so 

 much loosened that it has been necessary to keep them together 

 with wire. 



"Where the blow was received the fissure is very narrow, 

 but on tracing it towards the base of the skull it is a gaping 



