Kehrer, A. and Engelmann, S. and Bauer, R. and Taeger, C. and Grechenig, S. and Kehrer, M. and Prantl, L. and Tamm, E. R. and Bleys, R. L. A. W. and Mandlik, V. (2018) The nerve supply of zygomaticus major: Variability and distinguishing zygomatic from buccal facial nerve branches. CLINICAL ANATOMY, 31 (4). pp. 560-565. ISSN 0897-3806, 1098-2353
Full text not available from this repository. (Request a copy)Abstract
The zygomaticus major (ZM) is important for the human smile. There are conflicting data about whether the zygomatic or buccal branches of the facial nerve are responsible for its motor innervation. The literature provides no precise distinction of the transition zone between these two branch systems. In this study, a definition to distinguish the facial nerve branches at the level of the body of the zygoma is proposed. In the light of this definition, we conducted an anatomical study to determine how the source of innervation of the ZM was distributed. A total of 96 fresh-frozen cadaveric facial halves were dissected under loupe magnification. A hemiparotidectomy was followed by antegrade microsurgical dissection. Any branch topographically lying superficial to the zygoma or touching it was classed as zygomatic, and any neighboring inferior branch was considered buccal. The arborization of the facial nerve was diffuse in all cases. In 64 out of 96 specimens (67%, 95% CI: 56% to 76%), zygomatic branches innervated the ZM. Buccal branches innervated ZM in the other 32 facial halves (33%, 95% CI: 24% to 44%). There were no differences in respect of sex or facial side. All facial halves displayed additional branches, which crossed the muscle on its inner surface without supplying it. In 31 specimens, a nerve branch ran superficial to ZM in its cranial third. According to our classification, the zygomaticus major is innervated by zygomatic branches in 67% of cases and by buccal branches in 33%. Clin. Anat. 31:560-565, 2018. (c) 2018 Wiley Periodicals, Inc.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FACE-LIFT; RETAINING LIGAMENTS; ANATOMIC VARIATIONS; SURGICAL ANATOMY; PAROTID-GLAND; AXONAL LOAD; MUSCLE; PALSY; LOCALIZATION; REANIMATION; zygomaticus major; facial nerve; zygomatic nerve branches; buccal nerve branches; facial paralysis; facial muscles; mimetic muscles |
| Subjects: | 500 Science > 570 Life sciences 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Chirurgie Medicine > Lehrstuhl für Unfallchirurgie Biology, Preclinical Medicine > Institut für Anatomie > Lehrstuhl für Humananatomie und Embryologie > Prof. Dr. Ernst Tamm |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 19 Mar 2020 14:30 |
| Last Modified: | 19 Mar 2020 14:32 |
| URI: | https://pred.uni-regensburg.de/id/eprint/14692 |
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