Focal brain dysfunction
<ol>
 
 
            vascular events (CVA)<br>
 
            demyelination<br>
 
            infection, such as cerebral abcess<br>
 
            focal head injury<br>
 
            brain tumour 
</ol>
 
Diffuse brain dysfunction
<ol>
 
            infection, such as meningitis or encephalitis
 
            epilepsy<br>
 
            hypoxia and hypercarbia<br>
 
            drugs, poisoning and overdoses ( including alcohol)<br>
 
            metabolic/endocrine causes, such as diabetic coma, hepatic or renal failure, hypothyroidism, severe electrolyte disturbances<br>
 
            hypotension, or hypertensive crisis<br>
 
            diffuse head injury<br>
 
            subarachnoid haemorrhage<br>
 
            hypothermia, hyperthermia
 
            <br>