"Triple cross" of the hypoglossal nerve and its microsurgical impact to entrapment disorders
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Tarih
2006
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Georg Thieme Verlag Kg
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
Objective: Cadaveric dissections were performed to review the intracranial and extracranial course of the hypoglossal nerve. The neurological significance of a newly defined "triple cross" of the hypoglossal nerve is discussed. Materials and Methods: 10 cadaveric heads (left and right; 20 sides) were dissected using microsurgical techniques. Results: In the cisternal segment of hypoglossal nerve, the diameter of the rostral trunk amounted to 155-680 mu m (mean 435 mu m), and the caudal trunk to 210-820 mu m (mean 482 mu m). The roots formed three trunks in 20% of the hypoglossal nerves and two trunks in the rest. As a first cross, the anterior medullary segment of the vertebral artery crossed the hypoglossal nerve roots in 14 of 20 sides (70%). As a rare variation, the vertebral artery extended medial to the nerve (25%) or between its roots (5%). The second cross was found between the descendens hypoglossus and the occipital artery (75%), sternocleidomastoid artery and vein complex (15%) and external carotid artery (10%). The third cross was shown in the submandibular triangle between the lingual hypoglossus and its drainage vein; vena committans nervus hypoglossus. Conclusion: Throughout its way, the hypoglossal nerve passes over vascular structures in three crossing points which may serve as a probable cause of hypoglossal nerve entrapment disorders.
Açıklama
Anahtar Kelimeler
hypoglossal nerve, triple cross, cross-compression, entrapment disorders, microsurgical anatomy
Kaynak
Minimally Invasive Neurosurgery
WoS Q Değeri
Q3
Scopus Q Değeri
N/A
Cilt
49
Sayı
4
Künye
closedAccess
