EEG.

I met with the neurologist today.  He's sending me for an EEG on Monday.  The paperwork says I should avoid more than four hours sleep prior to the test?

Electroencephalography, or EEG, monitors brain activity through the skull.  EEG is used to help diagnose certain seizure disorders, brain tumors, brain damage from head injuries, inflammation of the brain and/or spinal cord, alcoholism, certain psychiatric disorders, and metabolic and degenerative disorders that affect the brain.  EEGs are also used to evaluate sleep disorders, monitor brain activity when a patient has been fully anesthetized or loses consciousness, and confirm brain death.

This describes what I feel happening. 

Neurological symptoms may occur related to your central nervous system, which consists of your brain and spinal cord, or your peripheral nervous system, which links your spinal cord and brain to all other parts of your body. The extensive network of peripheral nerves includes the motor nerves, which help your muscles contract, and the sensory nerves, which allow you to feel a range of sensations. In addition, your peripheral nerves help control some of the involuntary functions of the autonomic nervous system, which regulates your internal organs, sweat glands and blood pressure.

Unfortunately, peripheral nerves are fragile and easily damaged. Damage to a peripheral nerve can interfere with the communication between the area it serves and your brain, affecting your ability to move certain muscles or feel normal sensations. Your symptoms will depend on the cause of your neuropathy and on which nerve or nerves are involved.

            If a sensory nerve is damaged, you're likely to experience symptoms that may include:

• Pain
• Numbness
• Tingling
• Muscle weakness
• Burning
• Loss of feeling

"The sensation that you're wearing an invisible glove or sock"

"You might also experience a sharp fall in your blood pressure when you stand up, which may cause you to faint or feel lightheaded."