Head and neck surgery
Head: The upper part of the human body, or the front or upper part of the body of an animal, typically separated from the rest of the body by a neck, and containing the brain, mouth, and sense organs.
Also, skull, facial bones, injuries: craniocerebral trauma
Neck: The part of a human or animal body connecting the head to the rest of the body.
Also, cervical vertebrae, neck muscles