👉 Barnett's disease, also known as "Barnett's syndrome," is a genetic disorder that affects the nervous system and can lead to various physical and mental impairments. It involves abnormal growth of nerve cells in certain areas of the brain, which can cause repetitive patterns of movement or paralysis, including walking, speaking, swallowing, and breathing. This condition is usually inherited from one parent but can also occur spontaneously due to a mutation in gene products.