In narcolepsy, the brain does not pass through the normal stages of dozing and deep sleep but goes directly into rapid eye movement (REM) sleep. As a result, nighttime sleep does not include much deep sleep, so the brain tries to "catch up" during the day. Narcolepsy is attributed to deficient production in the brain's lateral hypothalamus of the neuropeptide protein called hypocretin (image), which is the hormone known to regulate sleep patterns.
The nervous system is essentially the body’s electrical wiring. The nervous system can also experience functional difficulties, conditions such as epilepsy, Parkinson's disease, multiple sclerosis, ALS, Huntington's chorea, and Alzheimer's disease. Structural disorders such as brain or spinal cord injury, Bell's palsy, cervical spondylosis, carpal tunnel syndrome, brain or spinal cord tumors, peripheral neuropathy, and Guillain-Barré syndrome also strike the nervous system.
Neurotransmitter Testing is now available to detect imbalances among your major brain chemicals (dopamine, serotonin, GABA, glutamate, epinephrine, norepinephrine, and others. Sounds like the way forward for many mental health issues....No idea if these are legit service providers,though.