Joints and their classification bony joints fibrous joints cartilaginous joints Synovial joints 7-1.
Movement at Joints. Types of Motions at Synovial Joints Gliding –f–flat bone surfaces moving...
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Transcript of Movement at Joints. Types of Motions at Synovial Joints Gliding –f–flat bone surfaces moving...
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
Figure 7.4a
CB
A
Figure 7.4b
C
B
A
Figure 7.4c B
A
C
B
A
Figure 7.4e
C
B
A
Figure 7.4f
B
A
• 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
Types of Motions at Synovial Joints
Figure 7.5a
B
A
Figure 7.5b
BA
Figure 7.5c B
A
Figure 7.6a
A
Figure 7.6b
A
Figure 7.7a
A
Figure 7.7b
A B
Special Movements at Synovial Joints
• Elevation– lift upward
• Depression– downward movement
• Protraction– movement forward
• Retraction– movement back to anatomical position
Figure 7.8ab
A B
Figure 7.8cd
BA
• 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
Special Movements at Synovial Joints
Figure 7.8ef
BA
Figure 7.8g
B
A
• 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
Special Movements at Synovial Joints
Figure 7.8h
BA