PowerPoint ® Lecture Slides prepared by Leslie Hendon, University of Alabama, Birmingham HUMAN ANATOMY fifth edition MARIEB | MALLATT | WILHELM 9 Copyright.

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PowerPoint ® Lecture Slides prepared by Leslie Hendon, University of Alabama, Birmingham HUMAN ANATOMY fifth edition MARIEB | MALLATT | WILHELM 9 Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Joints PART 4

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Synovial Joints Classified by Shape  Pivot joints  Classified as uniaxial – rotating bone only turns around its long axis  Examples  Proximal radioulnar joint  Joint between atlas and axis

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Pivot Joint Figure 9.7c

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Synovial Joints Classified by Shape  Condyloid joints  Allow moving bone to travel  Side to side – abduction-adduction  Back and forth – flexion-extension  Classified as biaxial – movement occurs around two axes

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Condyloid Joint Figure 9.7d

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Synovial Joints Classified by Shape  Saddle joints  Each articular surface has concave and convex surfaces  Classified as biaxial joints

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Synovial Joints Classified by Shape Figure 9.7e

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Synovial Joints Classified by Shape  Ball-and-socket joints  Spherical head of one bone fits into round socket of another  Classified as multiaxial – allow movement in all axes  Shoulder and hip joints

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Ball-and-Socket Joint Figure 9.7f PLAY Movement of the glenohumeral joint (a)

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Sternoclavicular Joint Figure 9.8a

Copyright © 2008 Pearson Education, Inc., publishing as Benjamin Cummings Sternoclavicular Joint Figure 9.8b