The controversy of cranial bone motion

Area of Science:

• Anatomy and physiology of the cranial complex.
• Biomechanical analysis of cranial structures.

Background:

• The existence and extent of cranial bone motion are debated.
• This controversy impacts the acceptance of physical therapy interventions like cranial osteopathy and craniosacral therapy.
• The core belief in these therapies is that cranial bone mobility allows for somatic dysfunction and therapeutic application.

Purpose of the Study:

• To review existing literature on cranial bone motion.
• To better understand the controversial topic of cranial bone mobility.
• To inform physical therapists about the current evidence.

Main Methods:

• Systematic literature review of published research on cranial bone motion.
• Analysis of animal and human studies investigating cranial complex biomechanics.

Main Results:

• Published research on cranial bone motion is scant and inconclusive.
• Studies suggest a potential for small-magnitude motion in cranial bones.
• The evidence base for significant cranial bone mobility remains limited.

Conclusions:

• Physical therapists should critically evaluate the literature supporting cranial bone motion.
• Further rigorous research is required to resolve the controversy surrounding cranial bone mobility.
• Outcomes research is essential to validate the efficacy of cranial bone mobilization therapies.