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Chapter 2. Prehension

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Table A.l<br />

Appendix A - Human Upper Limb Anatomy 355<br />

Degrees of freedom (df) of the upper limb (continued)<br />

Bones Joints (tvDe) df Motions<br />

Wrist & Hand<br />

scaphoid, mdiocarpal 2 flexion & extension<br />

lunate & (ellipsoid, synovial) radial & ulnar deviation<br />

triquetrum (abduction & adduction)<br />

(3 carpals)<br />

carpals midcarpal joint & 1 flexion & extension<br />

intercarpal joints<br />

(irregular, many<br />

planar, synovial joints)<br />

2-3? radial & ulnar deviation<br />

rotations?<br />

NOTE: there are interdependent<br />

motions about the<br />

radiocarpal, midcarpal &<br />

intercarpal joints<br />

meta-<br />

carpals<br />

1st carpometacarpal<br />

(saddle, synovial)<br />

2nd & 3rd carpo- little<br />

metacarpal joints<br />

(irregular, synovial)<br />

3 flexion & extension<br />

abduction & adduction<br />

internal & external rotation<br />

NOTE: rotation is coupled to<br />

flexion & extension (due to<br />

ligaments)<br />

4th carpometacarpal 1 flexion & extension<br />

(irregular, synovial)<br />

5th carpometacarpal 2? flexion & extension<br />

(modified saddle, synovial) abduction & adduc tion<br />

4th and 5th (+orher) l? NOTE: with 5th mp abd? or<br />

intermetacarpals cupping?<br />

(? , synovial)

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