brain, spinal cord, and nerve disorders
Numbness
Key Points
Numbness refers to partial or complete loss of sensation and is often accompanied by abnormal sensations, such as tingling. Numbness, which has many causes, occurs when one part of the pathway from sensory receptors in the skin to the brain malfunctions. If people have any Warning signs , they should see a doctor immediately. Telling doctors which parts of the body are affected and how quickly symptoms develop helps doctors identify the location and cause of the malfunction. Testing usually starts with nerve conduction studies and electromyography if the sensory nerves, plexuses, or spinal nerve roots are thought to be affected or with MRI if the brain or spinal cord is thought to be affected. 