The elusive petroexoccipital articulation

Area of Science:

• Forensic Anthropology
• Human Osteology
• Anatomical Variation

Background:

• The petroexoccipital articulation, also known as the jugular synchrondrosis, is a joint in the human skull.
• Understanding the ossification patterns of cranial sutures and articulations is crucial for age estimation in forensic and anthropological studies.

Purpose of the Study:

• To investigate the age-related closure patterns of the petroexoccipital articulation (jugular synchrondrosis).
• To evaluate the potential of this articulation as a reliable indicator for estimating age at death in human skeletal remains.

Main Methods:

• Macroscopic and radiographic examination of 1,869 human skulls from the Hamann-Todd Collection.
• Systematic assessment of the degree of closure of the petroexoccipital articulation across different age groups.

Main Results:

• The petroexoccipital articulation typically closes between 20 and 50 years of age.
• Complete closure occurred before 20 years in 7-10% of skulls, while 5-9% remained open.
• Partial closure frequency was consistent across most age groups, except for a notable increase in the 30-35 year group (17.5%).
• No significant differences in closure rates were observed based on ethnicity, sex, or laterality.

Conclusions:

• The petroexoccipital articulation exhibits a defined closure period, primarily between 20 and 50 years.
• While variable, the jugular synchrondrosis shows potential as an ancillary method for age estimation in skeletal analysis.
• Further research is warranted to refine its application in forensic and anthropological contexts.