NonNeutral Motion Mechanics

Coupled movement of a group of three or more vertebrae from a nonneutral position is characterized by sidebending and rotation occurring in the same direction (Type II motion mechanics). For example, when the lumbar spine is in flexion (forward-bending) right rotation results in right sidebending and left rotation results in left sidebending. as he discusses nonneutral (Type II) motion mechanics in the lumbar spine.

(Type II) motion mechanics in the lumbar spine.

Motion of cervical segments C2 through C7 is always characterized by nonneutral motion mechanics. For example, the cervical spine rotates and sidebends to the side regaurdless of whether it is flexed, extended, or in a neutral position. as he discusses nonneutral (Type II) motion mechanics in the cervical spine.

(Type II) motion mechanics in the cervical spine.

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