Question

How many DOF do you have in the following : your wrist and hand combined, knee, ankle, shoulder, hip and knuckle

Answer 1

Answer:

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Explanation:

1.A healthy human wrist has three DOF (degrees of freedom).

2.The wrist can rotate around or back and forth so that contributes to 4 degrees of freedom. In total the hand has 19 degrees of freedom.

3.The knee joint has only one degree of freedom (1-DOF). The knee joint can rotate only about the fixed axis parallel to the ground.

4.The human ankle performs two kinds of movement, flexion/extension and inversion/eversion, allowing two degrees of freedom. Ball-and-socket joints, such as the human hip, allow three degrees of freedom.

5.The shoulder joint has three-DOF rotational motions—flexion–extension (motion in the sagittal plane), abduction–adduction (motion in the coronal plane), and medial–lateral rotation (motion in the transversal plane).

6.Ball-and-socket joints, such as the human hip, allow three degrees of freedom.

7.Hand Model

The human hand has 27 degrees of freedom: 4 in each fin- ger, 3 for extension and flexion and one for abduction and adduction; the thumb is more complicated and has 5 DOF, leaving 6 DOF for the rotation and translation of the wrist 1.

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