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Background <p>Neuropathy and neuralgia of the great auricular nerve are rare but possible. In recent years, this nerve has been used for grafting in plastic surgery. To ensure the safety of such clinical applications, it is essential to have a thorough understanding of the nerve's anatomy, its relations with surrounding structures, and its course. The aim of this study is to describe the level at which the nerve becomes superficial on the sternocleidomastoid muscle (also known as the punctum nervosum) and its bifurcation point, using the same landmarks to identify the segment accessible as a single unit.</p> Materials and methods <p>In this study, 15 cadavers (30 sides) were used. The study identified bony landmarks as the mastoid process and the angle of the mandible, with measurements made relative to these points.</p> Results <p>The average diameter of the nerve was found to be 1.79 ± 0.14 (1.50–1.99) mm. The length of the nerve from its exit point to its bifurcation was measured to be an average of 76.56 ± 7.11 (65.55–88.41) mm. The distance between the mastoid process and the point where the nerve emerges at the punctum nervosum was measured to be an average of 73.89 ± 5.26 (60.73–83.15) mm, while the distance to the bifurcation was measured to be average of 29.65 ± 5.00 (20.72–37.92) mm.</p> Conclusions <p>The measurements obtained in this study can be used to identify the exit and bifurcation points of the great auricular nerve at the punctum nervosum, relative to the angle of the mandible and the mastoid process. Utilizing these landmarks in nerve-related interventions can minimize complications and increase success rates.</p>

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Where is The Main Trunk of Great Auricular Nerve?

  • 期刊论文

  • 发表日期：

    2025年8月5日

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  • Mehmet Yilmaz,
  • Yigit Gungor,
  • Bahar Selenay Bulut,
  • Aysun Uz

摘要

Background

Neuropathy and neuralgia of the great auricular nerve are rare but possible. In recent years, this nerve has been used for grafting in plastic surgery. To ensure the safety of such clinical applications, it is essential to have a thorough understanding of the nerve's anatomy, its relations with surrounding structures, and its course. The aim of this study is to describe the level at which the nerve becomes superficial on the sternocleidomastoid muscle (also known as the punctum nervosum) and its bifurcation point, using the same landmarks to identify the segment accessible as a single unit.

Materials and methods

In this study, 15 cadavers (30 sides) were used. The study identified bony landmarks as the mastoid process and the angle of the mandible, with measurements made relative to these points.

Results

The average diameter of the nerve was found to be 1.79 ± 0.14 (1.50–1.99) mm. The length of the nerve from its exit point to its bifurcation was measured to be an average of 76.56 ± 7.11 (65.55–88.41) mm. The distance between the mastoid process and the point where the nerve emerges at the punctum nervosum was measured to be an average of 73.89 ± 5.26 (60.73–83.15) mm, while the distance to the bifurcation was measured to be average of 29.65 ± 5.00 (20.72–37.92) mm.

Conclusions

The measurements obtained in this study can be used to identify the exit and bifurcation points of the great auricular nerve at the punctum nervosum, relative to the angle of the mandible and the mastoid process. Utilizing these landmarks in nerve-related interventions can minimize complications and increase success rates.