Distractors
Its fibers run horizontally, making it stronger in extension and lateral flexion than rotation
The deeper transversospinalis group provides broader stabilization and movement than the spinalis
The spinalis, the iliocostalis, and the trapezius comprise the erector spinae muscles.
Key
It is the most medial of the three erector spinae muscles
Question
According to Functional Anatomy columnist Christy Cael, which of these statements is accurate regarding the spinalis?