1. Coma- a clinical state of unarousability or unresponsiveness to any internal or external stimuli.
2. increased intracranial pressure- an increased in the normal value of 5-15mmHg
3. Epilepsy- chronic disorder characterized by recurrent and unprovoked seizure (seizure is an abnormal muscular contraction due to an abnormal electrical activity of the brain
4. stroke- sudden loss of brain function resulting from disruption of blood supply
5. Parkinson's Disease- a progressive neurologic disorder that affects movement resulting from degeneration of substantia nigra
6. Huntington's Disease-  a progressive autosomal dominant hereditary resulting from degeneration of certain nerve cells
7. Alzheimers' Disease- a progressive degenerative neurologic disorder characterized by memory loss, impared judgment, and personality changes.
8. Guillian Barre Syndrome- acute autoimmune disorder that destroys the myelin sheath of the peripheral nerves.