Tone is the expression of vibratory frequencies through atmosphere or matter. With regard to the non-linear Tonal Chiropractic Model, the acknowledgement is made that neural tone affects postural tone, which in turn affects spinal segment position.

Neural tone can be described in terms of the degree of tension along the spinal cord and brain, which involves the meninges, or coverings, that strongly anchor the spinal cord to the spinal column at specific points of connection.

Stress (emotional/mental, chemical, and/or physical) can be stored as an "imprint" or "memory" in the spinal cord in the form of tension or "locked-up" vibratory information. This distortion has a negative impact on one’s overall quality of life since it is through the nervous system that we live our lives.