�y��vlog

To give Passage to the Vessels that go to the Diploe.

The disease commences in the �徱�����ë, and results in the formation of a central sequestrum, around and beneath which the tuberculous process spreads.

They may originate in the pericranium, in the �徱�����ë, or in the dura mater, and usually involve the bones of the vault.

The intermediate layer—the �徱�����ë—is highly vascular, branches of the meningeal vessels anastomosing freely in its open porous substance with branches derived from the pericranial vessels.

The human skull consists of two tables of solid bone, an inner and an outer, with a spongy cellular substance interposed between them, termed the diploe; and such is the effect of this arrangement, that the blow which would fracture a continuous wall of bone has its force broken by the spongy intermediate layer, and merely injures the outer table, leaving not unfrequently the inner one, which more especially protects the brain, wholly unharmed.