Deep Front Line

Plantar arch · Spine · Cranial base

Moderate evidence — multi-segment chain
deep-front-line

Tibialis posterior → deep posterior compartment fascia → adductor fascia → psoas/iliacus fascia → endopelvic fascia → diaphragm → pretracheal fascia

Structures

Muscle references

Tibialis posteriorPsoas majorIliacusDiaphragmLongus colli
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Described as a deep structural axis through successive fascial compartments, not a continuous mechanical line. Several transitions (e.g. diaphragm to cervical fascia) have weaker direct dissection evidence than the posterior chain.

Sources

What Is Evidence-Based About Myofascial Chains: A Systematic Review

Wilke J et al. · Arch Phys Med Rehabil, 2016