Extensor Muscles and Head Balance

Thus the forward balance of the skull on the spine plays a central role, not only in the maintenance of the posture of the head but of uprig
The balance of the head, and its relationship to the neck muscles, play a global role in upright posture.

The Effects of Forward Head Posture on Neck Extensor Muscle Thickness: An Ultrasonographic Study

Southfields Alexander Technique

Balance Control Mediated by Vestibular Circuits Directing Limb Extension or Antagonist Muscle Co-activation - ScienceDirect

Human muscle system, Functions, Diagram, & Facts

Human muscle system, Functions, Diagram, & Facts

Músculos cervicales Flashcards

Trunk Extension Exercise Progressions - My Rehab Connection

Deep back muscles: Anatomy, innervation and functions

I thought I had good posture until I saw this photo. : r/orthotropics