Fig. 5From: Strain pattern of each ligamentous band of the superficial deltoid ligament: a cadaver studyStrain pattern of the tibionavicular ligament (TNL). The TNL works most effectively in plantarflexion-abduction in clock motion (a). The TNL begins to tense gradually at 10° plantarflexion (b). The tension becomes stronger as the plantarflexion angle increases in axial motionBack to article page