HVLA in somatic dysfunction targets which barrier type?

• A. Elastic barrier
• B. Anatomic barrier
• C. Physiologic barrier
• D. Restrictive barrier

Answer: (D)

HVLA aims to overcome the restrictive barrier created by somatic dysfunction. In this framework, joints can be limited by several barriers: elastic (the tissue’s stretch limit), anatomic (bone-to-bone contact), physiologic (neural and muscular constraints that limit movement), and restrictive (the dysfunction-related barrier that sits within the physiologic range). The thrust of HVLA is directed at the restrictive barrier to release the dysfunction and restore freer motion, ideally allowing movement to proceed toward the elastic or restored physiologic range without crossing into the anatomic barrier. The elastic and anatomic barriers describe other limits you’d avoid pushing past, while the physiologic barrier refers to neuromuscular control; the key target of HVLA in somatic dysfunction is the restrictive barrier.