Final answer:
Military neck is associated with the loss of cervical lordosis, which is the curvature in the neck region. Unlike kyphosis and lordosis, which are excessive curvatures, military neck involves a reduction or straightening of the neck's natural curve.
Step-by-step explanation:
Military neck is associated with a loss of cervical lordosis. Cervical lordosis is the natural curve in the neck region, and when this curve is reduced or becomes straight, it is sometimes referred to as a military neck. This condition is one among several disorders associated with the curvature of the spine. The other disorders include kyphosis, which is an excessive posterior curvature of the thoracic region, and lordosis, an excessive anterior curvature of the lumbar region. However, in the case of military neck, the curve in the cervical spine flattens, which deviates from the normal alignment and can cause discomfort or pain.