Which option lists the choices for controlling the cervical spine from least to most effective?

The selection identifies various orthotic devices used for cervical spine control, ranking them from least effective to most effective based on their stability and immobilization capabilities.

A soft collar is designed mainly to provide mild support and limit motion without significant immobilization, making it the least effective option in terms of controlling cervical spine movement. It is generally used for mild injuries or conditions that do not require rigid stabilization.

The SOMI (Sternal Occipital Mandibular Immobilizer) is a more rigid device that provides better control than a soft collar by restricting motion at various levels of the cervical spine and preventing flexion and extension.

Four-poster cervical thoracic orthoses (CTO) offer even more support by providing substantial immobilization through its four-post design, which is effective at limiting both movement and promoting stability in the cervical region.

The HALO system represents the highest level of cervical spine immobilization. It is a rigid external fixation device that effectively restricts all movement of the cervical spine, making it the most effective device listed for controlling cervical spine motion.

The ranking from least to most effective reflects a clear understanding of how each orthotic device functions, with the soft collar at the bottom end of the scale and the HALO at the top,