Akademik Veri Yönetim Sistemi
24. Ulusal anatomi Kongresi, İstanbul, Türkiye, 19 - 21 Eylül 2024, cilt.1, sa.1
Objective:
The great auricular nerve (GAN) courses over the sternocleidomastoid muscle
(SCM), innervating the skin over the parotid gland, the lower part of the
auricle, and the mastoid process. Our goal was to assert the morphometric features
of GAN.
Methods:
After ethical approval was obtained, the neck regions of 26 cadavers (15 males,
11 females) in the Department of Anatomy, Istanbul Faculty of Medicine were
dissected bilaterally. Distances of GAN according to certain anatomical
landmarks were measured with a digital caliper, and the number of branches
(also on the SCM) was calculated. The SPSS 21.0 program was utilized for
statistical analysis.
Results:
The mean perpendicular distances of the origin point of GAN behind SCM to the
vertical and transverse lines passing over the external occipital protuberance
(EOP) were 72.79±14.52 mm and 97.48±13.65 mm, respectively. Similarly, the mean
perpendicular distances of the point where GAN crossed the anterior border of SCM
to the vertical and transverse lines passing over EOP were 90.35±17.73 mm and
68.75±15.13 mm, respectively. The perpendicular distance of the point where GAN
crossed the anterior border of SCM to the vertical line passing over EOP was
statistically significant between genders (p<0.05). The mean branching
distance of GAN was 23.53±13.85 mm. The number of branches and the number of
branches on the SCM of GAN was a median of 2.
Conclusion:
The morphometric data we obtained may be useful in preventing GAN injury
during rhytidectomies and parotidectomies and in easily estimating the location
of the nerve during invasive procedures.