The nervous system is the master controller of all cells, tissues and organs. Nerves control the heart, lungs, immune system, endocrine system, as well as our thoughts and other cognitive processes.

Effectively, the nervous system is in charge of directing and overlooking all bodily functions - keeping us alive and healthy, fighting off diseases and infections, and healing us after we have sustained injury.

A straight cervical spine is important to avoid the potential pains and issues from an out of line spine:

Many people are surprised to learn that the spine plays a key role in protecting the nervous system. When there is atlas misalignment (C1 vertebra), the spine will deviate from its normal position, commonly referred to as an out of line spine. Over time, the nervous system may begin to malfunction which may lead to various health challenges throughout the body. When the atlas misalignment is corrected, the straight cervical spine can greatly enhance neurological health, healing and optimize function. Often a corrected or straight cervical spine will lead to improvement for common lower back injuries or other issues causing or resulting from an out of line spine.

In fact, the main function of the spinal column (in addition to providing movement for the torso) is to encase and protect the spinal cord and nerve roots. Without this protection it's unlikely that we would survive a relatively small slip and fall injury.