Final answer:
Rotational movement involves the rotation of bones around their longitudinal axes, such as the medial and lateral rotation of the trunk at the shoulder and hip joints. This type of movement is integral to turning and twisting actions in the body.
Step-by-step explanation:
A type of nonlocomotor movement that involves a rotation of the trunk or a coiling of the body is called rotational movement. This occurs when a bone rotates around its longitudinal axis. Examples of such movement include the medial and lateral rotation of the trunk. Medial rotation is when the front of the body turns towards the midline, while lateral rotation is when it turns away from the midline. These movements are seen in multiaxial joints such as the shoulder and hip joints, where bones like the humerus and femur rotate around their long axis.
Rotation plays a crucial role in many bodily functions. For instance, when turning the head from side to side, it is the neck performing rotation. This type of movement is essential for tasks that involve turning or twisting the upper body, as often seen in various physical activities, some dances, and even day-to-day movements like looking over one's shoulder.