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Most of the rotation within the cervical region occurs in the joint between __________.

All of the following are provided by muscles except __________.

Lowering the arm to the side or the thigh back to the anatomical position is an example of __________.

From medial to lateral the erector spinae muscles are the __________.

The primary movers in cervical spine extension (against resistance) are the

Two different muscles may contract simultaneously at a joint and cause a motion that neither would cause if contracting alone.

The gastropod larval stage in which torsion occurs is called the ________.

The most complex molluscs belong to the class ________.

Snails, slugs, and limpets belong to Class ________.