Posterior Tibial Cortex Periosteal Band

fasciculus periostoalis tibiae posterioris

A fibrous periosteal band reinforcing the deep transverse leg fascia against the posterior tibial periosteum, providing additional structural support to the deep posterior compartment in the lower leg. It contributes to the fascial compartment boundary.

Region: Lower Leg

Biomechanics

Function & Actions

Reinforces the deep posterior compartment boundary; stabilises the posterior tibial periosteum against deep flexor muscle forces during contraction.

Clinical Relevance

Clinical Notes

This periosteal band is divided during deep posterior compartment fasciotomy for compartment syndrome, and its integrity contributes to the compartment boundary that elevates pressure in acute compartment syndrome. It is also the region stripped during tibial intramedullary nail placement where the posterior periosteum is elevated by the nail's endosteal passage.

Pathology

Common Injuries & Conditions

Deep Posterior Compartment Decompression

Division of the posterior tibial periosteal fascial band during deep posterior compartment fasciotomy for acute or chronic exertional compartment syndrome to adequately decompress the FHL, FDL, and tibialis posterior.