Hypoxia and Medicine

Is there any medical condition that affects in such a way that a person traps themself in a vegetative state ?

please help! Is there any medical condition that affects in such a way that a person traps themself in a vegetative state in which they live in a fantasy world where everything is what they want it to be? PLEASE mention name! =D

Public Comments

1. Yes there is many mental conditions and personality disorders that can do this but usually something traumatic must take place for a person to "suddenly" slip into this state of mind..But it is very important to get medical help before it turns into a bigger problem and permanent damage occurs.
2. If what you are describing occured recently and with no other obvious behavioural issued/mental ilness then it could be due to shock or post traumatic illness. If the patient has a history of mental illness such as schizophrenia it could also be a catatonic state. This is rare and basically complete psychological vegetation.