Posture, Static Alignment, and Postural Dysfunction
Posture, Static Alignment, and Postural Dysfunction
This domain tests your ability to read static alignment and connect it to predictable muscle patterns. The exam asks for plumb-line landmarks, named postural syndromes, and the tight/weak pairing that drives exercise choice.
Core rules
- In lateral view, the plumb line should pass near the earlobe, acromion, greater trochanter, just anterior to the knee joint, and slightly anterior to the lateral malleolus.
- Anterior view: level shoulders, level iliac crests, patellae facing forward, feet neutral. Posterior view: scapulae level and flat, spine straight, calcaneal alignment.
- Upper crossed syndrome: tight upper trapezius, levator scapulae, pectoralis major and minor, and suboccipitals; weak deep cervical flexors, lower trapezius, rhomboids, and serratus anterior. Head forward, shoulders rounded, thoracic kyphosis.
- Lower crossed syndrome: tight iliopsoas, rectus femoris, erector spinae, and latissimus dorsi; weak gluteus maximus and medius, transversus abdominis, and internal oblique. Anterior pelvic tilt and lumbar lordosis.
- Pronation distortion syndrome: tight peroneals, gastrocnemius, soleus, and IT band/TFL; weak tibialis anterior, tibialis posterior, gluteus medius, and intrinsic foot muscles. Feet flatten, knees valgus, internal rotation.
- Posture is dynamic and influenced by fatigue, habit, pain, and equipment. Recheck after corrective work.
Worked example
A client stands with an anterior pelvic tilt and lumbar extension. Reasoning: the pelvis is the key landmark. Tight hip flexors and erector spinae pull the pelvis into tilt; glutes and deep abdominals cannot control it. The corrective sequence is not 'stretch the back' alone: inhibit hip flexors and lumbar erectors, lengthen hip flexors, activate glutes and core, integrate a hip hinge or bridge with a neutral pelvis.
Traps
- Treating a named syndrome as a diagnosis.
- Assuming every tight muscle needs stretching before you test length.
- Missing the posterior view, where scapular asymmetry is obvious.