forehead: frontal bone or sincipital bone is unpaired bone which consists of two portions, the vertically oriented squamous part, and the horizontally oriented orbital part, making up the bony part of the forehead, part of the bony orbital cavity holding the eye, and part of the bony part of the nose respectively, LOA-5 part of skull LOA-1
Don Brutzman, Joe Williams, John Carlson, Damon Hernandez
usage examples https://www.web3d.org/x3d/content/examples/HumanoidAnimation/Medical
X3D-Edit 4.0, https://www.web3d.org/x3d/tools/X3D-Edit
X3D Tidy, https://www.web3d.org/x3d/stylesheets/X3dTidy.html
RGB display axes showing XYZ direction in local coordinate system