How long does it take neurons have damage after its oxygen stop supply?What pathological change happened in brain when neuron started has damage?Know the different types of infectious brain disease? How to differentiate each?Understand the different types of stroke and its mechanism.Know the different types of physical brain damage.Know the different types of degenerative disease and the cause and symptoms of the disease.Know the different spine problems. What is hydrocephalus and how to differentiate each types of the problem.What is multiple sclerosis.