Original: It is a tough layer of dense fibrous tissue which runs from the frontalis muscle anteriorly to the occipitalis posteriorly L : The loose areolar connective tissue layer provides an easy plane of separation between the upper three layers and the pericranium .
Simplified: It is a tough layer of dense fibrous tissue L : The loose areolar connective tissue layer provides an easy plane of separation between the upper three layers and the pericranium .