NCIt definition : One of the transversospinales group of muscles, located in the superior portion of
the neck and covering the semispinalis cervicis. It takes its origin from the medial
tissue between the superior and inferior nuchal lines of the occipital bone, and inserts
into the superior articular processes of the lower four cervical vertebrae and the
tips of the transverse processes of the upper six or seven thoracic vertebrae; it
functions to extend the neck.;