The central nervous system works hard to receive sensory information from your environment, interpret it in seconds, and respond with the proper action. It is able to carry out this delicate operation behind every move you make because it communicates with another vital system in your body: the peripheral nervous system. Signals are constantly being passed back and forth between the peripheral nervous system and the central nervous system.
However, lupus leads to the body’s immune system producing harmful antibodies that bind to nerve cells, interrupting communications within your nervous system that results in cognitive dysfunction like confusion, memory loss, and difficulty expressing yourself. Interruptions in your nervous system might also lead to headaches or anxiety. Antibodies can also bind to the blood vessels that are essential to nerve cells’ survival, thus interrupting blood flow to nerves. These abnormalities in a patient’s blood flow can lead to a lack of oxygen flowing to the brain, worsening cognitive dysfunction. Moreover, lupus can also leverage neurotransmitters such as adrenaline to breach the highly selective blood-brain barrier, determine the region of the brain most vulnerable to autoantibodies that are poisonous to the nervous system, and attack the brain directly.
Overactive lupus or lupus flares can also lead to the release of proteins called cytokines that can inflame the brain. Additionally, patients that have lupus and develop blood clots (whether because of inflamed blood vessels or antiphospholipid antibodies) can have blood clots traveling to or occurring in the brain, leading to strokes.
Lupus that affects the central nervous system or peripheral nervous system is called neuropsychiatric lupus. Approximately 14% to over 80% of adult lupus patients and 22% to 95% of child patients experience neuropsychiatric lupus. Symptoms other than the ones previously mentioned can include:
• Seizures Psychosis Myelitis (inflammation of the spinal cord)
• Vision loss
• Face pain
• Hearing issues such as ringing in the ears
• Dizziness
• Fibromyalgia (chronic pain sensitization disorder believed to result from central nervous system pain pathways)