Exploration of the Intra-orbital Pattern of Cranial Nerves in the Second Trimester of Fetuses

Savaşan C., Can M., Üçkarış M., Keskinöz E. N., Aktekın M.

17th Congress of European Association of Clinical Anatomy, Praha, Çek Cumhuriyeti, 14 - 17 Eylül 2023, ss.182

  • Yayın Türü: Bildiri / Özet Bildiri
  • Basıldığı Şehir: Praha
  • Basıldığı Ülke: Çek Cumhuriyeti
  • Sayfa Sayıları: ss.182
  • Acıbadem Mehmet Ali Aydınlar Üniversitesi Adresli: Evet

Özet

AIM: To evaluate the cranial nerves in fetal orbit regarding their course and innervation pattern. METHODS: Six fetuses, with gestational

ages of 18-23 weeks, were dissected under a surgical microscope. After exploring the cavernous sinus and detecting the exit of cranial

nerves, we removed the bony orbital roof and then the periosteum. We traced the course of each cranial nerve in the orbit till their

entrance to muscles and neighboring structures. Relationships of them with surrounding structures were noted. RESULTS: Intra-orbital

course of the oculomotor, trochlear, ophthalmic and abducent nerves and their branches were determined. Course and innervation

patterns of these nerves were noted. The lacrimal gland’s location was recorded. The ciliary ganglion was located on the lateral and inferior

sides of the optic nerve. The oculomotor nerve’s divisions and the connection of the lower division with the ciliary ganglion were recorded.

The trochlear nerve was detected very close to the common tendinous ring and it was entering through the proximal portion of the

superior oblique muscle. CONCLUSION: This study provided the detailed anatomy of intra-orbital cranial nerves, extraocular muscles and

the lacrimal gland in fetuses of 18-23 weeks gestational age.