Accessory Nerve Disease, also known as Cranial Nerve XI Disorder, refers to a condition affecting the accessory nerve. This nerve is crucial for controlling movements in the head and neck region. There are several synonyms that can be used to describe this ailment, including Cranial Nerve XI Dysfunction, Spinal Accessory Nerve Disorder, and Accessory Neuropathy. These terms highlight the impairment of the accessory nerve's normal functioning. Symptoms of this condition may include weakness or paralysis in the muscles of the shoulder, neck, or throat. Seeking medical attention promptly is crucial to prevent further complications and manage the disease effectively.