Pivot joints allow for rotation, which can be external (for example when rotating an arm outward), or internal (as 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.
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.
References
This article incorporates text in the public domain from page 285 of the 20th edition ofGray's Anatomy(1918)
^Platzer, Werner (2008) Color Atlas of Human Anatomy, Volume 1, p.28
External links
Wikimedia Commons has media related to Pivot joints.
pivot, joint, animal, anatomy, pivot, joint, trochoid, joint, rotary, joint, lateral, ginglymus, type, synovial, joint, whose, movement, axis, parallel, long, axis, proximal, bone, which, typically, convex, articular, surface, ball, socket, joint, condyloid, j. In animal anatomy a pivot joint trochoid joint rotary joint or lateral ginglymus is a type of synovial joint whose movement axis is parallel to the long axis of the proximal bone which typically has a convex articular surface Pivot joint1 Ball and socket joint 2 Condyloid joint Ellipsoid 3 Saddle joint 4 Hinge joint 5 Pivot joint DetailsIdentifiersLatinarticulatio trochoideaTA98A03 0 00 045TA21557FMA75294Anatomical terminology edit on Wikidata According to one classification system a pivot joint like the other synovial joint the hinge joint has one degree of freedom 1 Note that the degrees of freedom of a joint is not the same as the same as joint s range of motion Contents 1 Movements 2 Examples 3 References 4 External linksMovements EditPivot joints allow for rotation which can be external for example when rotating an arm outward or internal as 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 EditExamples of a pivot joint include Proximal radioulnar joint Distal radioulnar joint Median atlanto axial jointIn 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 References Edit This article incorporates text in the public domain from page 285 of the 20th edition of Gray s Anatomy 1918 Platzer Werner 2008 Color Atlas of Human Anatomy Volume 1 p 28External links Edit Wikimedia Commons has media related to Pivot joints Synovial Joints Pivot Joints from The University of Michigan Medical School Portal Anatomy Retrieved from https en wikipedia org w index php title Pivot joint amp oldid 1059437216, wikipedia, wiki, book, books, library,
