What Constitutes Good Posture?
To be able to recognize the attributes of bad posture, one must first have some standard of what constitutes good or normal posture. Fortunately, many authors have discussed the importance of normal posture.1,4,5,7,8 Figure I demonstrates normal erect human posture under the conditions of static equilibrium. In the lateral view, normal postural alignment is defined as balance about a coronal line of reference or gravity line that passes through the external auditory meatus, acromioclavicular joints, greater trochanters and lateral malleoli. In the anteroposterior view, approximate skeletal symmetry allows division of the body into symmetrical halves with bisection of the following points: glabella; frenulum; episternal notch; xiphoid process; symphysis pubis; and a point midway between the medial malleoli of the ankle joints. Figure I: The normal correct human posture. Of course, radiographic examination may also be helpful in evaluating a patient’s posture since the x-ray passes throu
