If u v = 0. then u = 0 or v = 0.

Selected movements in diarthroses 1. Flexion and extension; hyperextension 2. Abduction and adduction 3. Rotation 4. Circumduction 5. Pronation and supination 6. Dorsiflexion and plantar flexion 7. Inversion and eversion 8. Elevation and depression IX. Bone and Joint Changes A. Osteoporosis - thinning and weakening of the bones generally associated with aging 1. Lack of calcium is a factor. 2. Osteoclast activity outweighs osteoblast activity. 3. More common in females due to lack of sex hormones, especially after menopause.