The tectorial membrane
lies atop the tiny hairs that line the inner ear, or cochlea.
Huisman, "Tectorial membrane
injury: frequently overlooked in pediatric traumatic head injury," American Journal of Neuroradiology, vol.
Freeman, "Longitudinally propagating traveling waves of the mammalian tectorial membrane
," Proceedings of the National Academy of Sciences of the United States of America, vol.
Actual bleeding in the subdural or epidural region is even less common with most cases occurring in the epidural space in children in conjunction with blunt trauma and skull base fracture or tectorial membrane
Longitudinal sections of guinea pig cochleas subjected to transtympanic neomycin treatment had a basilar membrane with a flat epithelium (B) compared with the control (A) in which the tectorial membrane
directly joined to the whole organ of Corti (H&E).
Such a fracture is classified as type I, is considered an impaction fracture of the occipital condyle and is potentially unstable, as the ipsilateral alar ligament may be incompetent; however, if the tectorial membrane
and contralateral alar ligament are preserved, sufficient ligamentous support may remain to preserve stability.
There is posterior displacement of the tectorial membrane
and compression of the lower pons and medulla.
The Organ of Corti contains hair-like nerve endings anchored on one end but free to respond to changes in fluid pressure and wave back and forth against the roof membrane (tectorial membrane
), where movement is changed to an electrical signal that travels to the brain via the acoustic nerve.