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Some unusual types of formation of the ansa cervicalis in humans and proposal of a new morphological classification
Author(s) -
Jelev Lazar
Publication year - 2013
Publication title -
clinical anatomy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 71
eISSN - 1098-2353
pISSN - 0897-3806
DOI - 10.1002/ca.22265
Subject(s) - medicine , hypoglossal nerve , anatomy , vagus nerve , cervical nerve , nerve root , reinnervation , pathology , tongue , stimulation
Ansa cervicalis (ansa hypoglossi) is a peripheral nerve structure—the primary choice for laryngeal reinnervation. Because the ansa formation is quite variable in humans, it is an object of a number of proposed classifications. Two interesting cases of formation of the ansa cervicalis were found during routine anatomical dissections. In the first case the unusual ansa had three basic roots—a superior one from the hypoglossal nerve, an aberrant middle root from the vagus nerve and an inferior root, coming from the cervical ventral branches. In the second case an ansa was described having roots from the vagus nerve and cervical ventral branches. Based on the reported variations and extensive review of the pertinent literature, a new morphological classification of the ansa cervicalis formation in human is proposed here. Clin. Anat. 26:961–965, 2013. © 2013 Wiley Periodicals, Inc.