Most neck pain that is not caused by whiplash or other trauma has a postural component as part of the underlying problem.
Sitting atop the body, the health of the neck is subject to the curvature of the spine below and the position of the head above.
The neck muscle pain can be caused by the following neck muscles becoming tight:
Scalene muscles (three pairs of muscles that help rotate the neck)
Suboccipital muscles (four pairs of muscles used to rotate the head)
Pectoralis minor muscles (a pair of thin triangular muscles at the upper part of the chest)
Subscapularis muscles (a pair of large triangular muscles near each shoulder joint)
Levator scapulae muscles (a pair of muscles located at the back and side of the neck).
If the alignment of the head and spine is not optimal, the neck can be predisposed to injury and/or the degenerative effects of wear and tear over time.
Forward Head and Shoulder Posture
The most common condition that contributes to neck pain is forward head and shoulder posture. Forward head posture is when the neck slants forward placing the head in front of the shoulders. This head position leads to several problems:
The forward pull of the weight of the head puts undue stress on the vertebrae of the lower neck, contributing to degenerative disc disease and other degenerative neck problems.
Similarly, this posture causes the muscles of the upper back to continually overwork to counterbalance the pull of gravity on the forward head.
This position is often accompanied by forward shoulders and a rounded upper back, which not only feeds into the neck problem but can also cause shoulder pain.
The more time spent with a forward head posture, the more likely it is that one will develop neck and shoulder problems.
Effects of Poor Posture on the Lower Cervical Vertebrae
The part of the neck that is particularly vulnerable to forward head posture is the lower part of the neck, just above the shoulders.
The lower cervical vertebrae (C5 and C6) may slightly slide or shear forward relative to one another as a result of the persistent pull of gravity on a forward head.
This shear force can be a problem for patients with jobs that require them to look down or forward all day, such as pharmacists who spend many hours counting pills or data entry workers who look at a computer screen.
Long-Term Negative Effects of Poor Posture
Prolonged shearing of the vertebrae from forward head posture eventually irritates the small facet joints in the neck as well as the ligaments and soft tissues.
This irritation can result in neck pain that radiates down to the shoulder blades and upper back, potentially causing a variety of conditions, including:
Trigger points in the muscles, which are points of exquisite tenderness that are painful to touch, along with limited range of motion.
Disc degeneration problems, which may potentially lead to cervical degenerative disc disease, cervical osteoarthritis, or a cervical herniated disc.