Movement at Joints

Types of Motions at Synovial Joints Gliding flat bone surfaces moving across each other Flexion decrease in angle between articulating bones Extension Increase in angle between articulating bones Hyperextension Bending beyond 180o degrees moving humerus backwards behind anatomical position

B C A Figure 7.4a

A C Figure 7.4b B

A Figure 7.4c B

A B C

A C Figure 7.4e B

A Figure 7.4f B

Types of Motions at Synovial Joints Abduction movement of bone away from midline Adduction movement of bone toward midline Circumduction movement of distal end in a circle Rotation bone revolves around its own longitudinal axis

A Figure 7.5a B

Figure 7.5b A B

Figure 7.5c B A

A Figure 7.6a

Figure 7.6b A

A Figure 7.7a

A B Figure 7.7b

Special Movements at Synovial Joints Elevation lift upward Depression downward movement Protraction movement forward Retraction movement back to anatomical position

Figure 7.8ab B A

Figure 7.8cd A B

Special Movements at Synovial Joints Inversion move of soles medially (inward) Toward each other Eversion move soles laterally (outward) Away from each other Dorsiflexion point (flex) toes upward As if standing on your heels Plantar flexion bend (point) toes downward Like a ballerinia

A B Figure 7.8ef

A Figure 7.8g B

Special Movements at Synovial Joints Supination movement of forearm so palms face forward or upward As if in anatomical position Pronation movement of forearm so palms face backward or downward

Figure 7.8h A B