You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is The joint that permits nodding of head while saying yes is: and explain in detail?
Atlanto-occipital joint is a synol between skull and C1 veebrae. It permits nodding of head such as flexison and extension (YES movement) and lateral flexion. Atlanto-axial joint is a pivot joint between C1 and C 2 veebrae. It permits rotation of head that is side to side movement (NO movement). Ref: Keith moore clinical anatomy, 4th Edition, Page 459.