Final answer:
Turning the head to look over one's shoulder is an example of rotational movement facilitated by synovial joints, specifically at the pivot joint between the first and second cervical vertebrae.
Step-by-step explanation:
Synovial Joints and Types of Movement Turning your head to look over your shoulder is an example of rotation. Synovial joints are highly mobile and allow for a wide range of movements. The action of rotating the head is due to the movement around a pivot joint, specifically between the first and second cervical vertebrae. This type of motion allows for side-to-side rotation of the head, such as when indicating 'no' or looking over one's shoulder.Angular movements, in contrast, like flexion and extension, occur when the angle between bones of a joint increases or decreases.
Flexion is a bending movement that decreases the angle between bones, whereas extension is a straightening movement that increases the angle. However, these are not the movements required to turn the head to look over the shoulder.Movement of the head to look over the shoulder is an example of rotation. Synovial joints allow different types of movement, and rotation is the movement of a bone as it rotates around its own longitudinal axis. Turning your head side to side or twisting your body are examples of rotational movement.