A neurological disorder is any disorder of the nervous system. Structural, biochemical or electrical abnormalities in the brain, spinal cord or other nerves can result in a range of symptoms.
Physical symptoms of neurological problems may include the following:

• Partial or complete paralysis..
• Muscle weakness.
• Partial or complete loss of sensation.
• Seizures.
• Difficulty reading and writing.
• Poor cognitive abilities.
• Unexplained pain.
• Decreased alertness.

These may range from medications such as the narcoleptics (haloperidol and chlorpromazine, for example) used to treat organic disorders of the brain such as schizophrenia, to comparatively simple analgesics, such as ibuprofen, acetaminophen and opiates to treat the painful effects of many neurological ailments.