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