Biopsychology 2

"New growth," a mass of cells that grows independently of the rest of the body.

Tumors that grow between the meninges, the three membranes that cover the central nervous system

Tumors that grow within their own membrane (i.e., meningiomas)

Tumors that are surgically removable with little risk of further growth in the body

Those that grow diffusely through surrounding tissue

It is difficult to remove or destroy them completely, and any cancerous tissue that remains after surgery continues to grow.

Tumors that do not originate in the brain, but instead are infiltrating tumor fragments carried to the brain by the bloodstream from some other part of the body. Metastasis is the transmission of disease from one organ to another.

Sudden-onset cerebrovascular disorders that cause brain damage.

Area of dysfunctional tissue surrounding the infarct.

Bleeding in the brain; occurs when a cerebral blood vessel ruptures and blood seeps into the surround structure and damages it.

A pathological balloonlike dilation that forms in the wall of an artery at a point where the elasticity of the artery wall is defective. Aneurysms can occur in any part of the body and can be congenital (present at birth) or can result from exposure to vascular poisons or infection.

A disruption of the blood supply to an area of the brain.

When a plug called a thrombus is formed and blocks blood flow at the site of its formation.

Similar to thrombosis, except that the plug called an embolus in this case, is carried by the blood from a larger vessel, where it is formed, to a smaller one, where it becomes lodged (a thrombus that has taken a trip).

When the walls of blood vessels thicken and the channels narrow, usually as the result of fat deposits; this narrowing can eventually lead to complete blockage of blood vessels.