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Rotation of the

Head & Spine

(Torso; Trunk)

Rotation of the Head

 

The turning of the head around an axis located at the center of the skull.

 

The head does not deviate (bend) off its center axis.

 

The head moves from side to side

Rotation of the Shoulders (Torso; Trunk)

 

The turning of the shoulders around an axis located at the center of the spine.

 

The shoulders do not deviate (bend) off the axis of the spine.

 

The shoulders move from a neutral position to one shoulder being in an anterior orientation (toward the ventral surface) while the opposite (contralateral) shoulder moves to a posterior (toward the dorsal surface) position.

 

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