CEREBRAL EDEMA:

DEFINITION:

Accumulation of fluid within the brain parenchyma following a generalized injury to brain.

TYPES:

There are two types of cerebral edema 

1.Vasogenic Edema.

2.Cytotoxic Edema.

VASOGENIC EDEMA:

• It is defined as accumulation of extracellular fluid which occurs when blood brain barrier is disrupted.

• Fluid moves from vascular compartment to extracellular spaces of brain .

It is further divided into types namely

1.localized [for example after inflammation]

2.Gneralized .[for example after profuse injury]

CYTOTOXIC EDEMA:

• This type of edema is because of generalized hypoxia ,ischemia and exposure to certain toxin.

• All these events leads to neuronal and glial cell injury which ultimately results in accumulation of fluid in extracellular spaces.

CONSEQUENCES OF EDEMA:

1. Brain become edematous and soft.

2. Overfill the cranial vault.

3. Gyri become flattened.

4. Sulci become narrowed.

5. Ventricular cavities become compressed.