Welcome to the MedHelp forum!
There are no nerves in the brain—yes nerves originate from it (cranial nerves) but brain is essentially made up of grey and white matter.
Any pathology of brain, its extent etc can be detected by MRI. The extent of damage that is caused is assessed by the size of the lesion and its location as different parts of the brain perform different functions.
Apart form this some brain pathologies are detected by examination of cerebro-spinal fluid through lumbar puncture. EEG is done is epilepsy is suspected.
Progression of a disease depends on type, cause and stage of diagnosis. A neurologist determines that based on clinical and laboratory evaluation.
Hope this helps. Take care!
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.