Comparative endocranial vascular changes due to craniosynostosis and artificial cranial deformation

Area of Science:

• Paleoanthropology
• Developmental Biology
• Neuroanatomy

Background:

• Craniosynostosis and artificial cranial deformation reshape the craniofacial complex, affecting both external (ectocranium) and internal (endocranium) structures.
• Endocranial alterations from these processes are less understood than ectocranial changes.
• Previous research primarily focused on the ectocranium, neglecting the endocranial vasculature.

Purpose of the Study:

• To investigate and compare endocranial vascular changes in craniosynostosis and artificial cranial deformation.
• To analyze middle meningeal vessel patterns and venous sinus impressions in both conditions.
• To understand the developmental plasticity of the endocranial vasculature in response to cranial alterations.

Main Methods:

• Creation of silicone rubber endocasts from 11 craniosynostotic, 17 artificially deformed, and 22 normal archaeological crania.
• Qualitative and quantitative analysis of middle meningeal vessel patterns and venous sinus impressions.
• Recording depth, width, convolution, and branch direction of middle meningeal vessels.

Main Results:

• Both craniosynostosis and artificial cranial deformation significantly altered endocranial vasculature.
• Craniosynostotic specimens showed wider and deeper venous sinuses under fused sutures compared to controls and deformed specimens.
• Artificially deformed skulls exhibited shallower sinuses under stress but compensatory enlargement of other sinuses, like occipital/marginal ones.

Conclusions:

• Endocranial vasculature is developmentally plastic and responds predictably to deformation.
• Distinct venous sinus patterns differentiate craniosynostosis from artificial cranial deformation.
• Increased intracranial pressure is hypothesized as the cause of venous sinus changes in craniosynostosis.