Pivot joint in rotating an arm inward). When rotating the forearm, these movements are typically called pronation and supination. In the standard anatomical position, the forearms are supinated, which means that the palms are facing forward, and the thumbs are pointing away from the body. In contrast, a forearm in pronation would have the palm facing backward and the thumb would be closer to the body, pointing medially. Examples of a pivot joint include: In contrast, spherical joints (or ball and socket joints) such as the hip joint permit rotation and all other directional movement, while pivot joints only permit rotation. Pivot
Motorcycle saddle Motorcycle saddle A motorcycle saddle is a term for a motorcycle seat in some parts of the world. It is a seat for carrying a rider and, possibly, a passenger, and which is attached to a motorcycle often but not exclusively, behind the fuel tank. There are several types of saddles used on motorcycles. Most common is the "dual saddle" or "benchseat" which is used on the majority of motorcycles today. It allows both the rider and passenger to be seating fore and aft on a single saddle. Dual saddles, that is two separate saddles (and often independently sprung), are