Fluid structure interaction analysis reveals facial nerve palsy caused by vertebral-posterior inferior cerebellar artery aneurysm
| Autor: | Hiroyuki Takao, Chiheb Dahmani, Mitsuyoshi Watanabe, Masato Watanabe, Tomoaki Suzuki, Shinji Nakazato, Sho Shinohara, Yukihiko Fujii, Yuichi Murayama, Hidemoto Fujiwara, Takashi Suzuki, Makoto Yamamoto, Yukinao Kambayashi |
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| Rok vydání: | 2015 |
| Předmět: |
Vertebral artery
Health Informatics Posterior cerebral artery Motion Aneurysm medicine.artery Image Processing Computer-Assisted medicine Humans Hemifacial Spasm cardiovascular diseases Vertebral Artery Posterior Cerebral Artery business.industry Hemodynamics Intracranial Aneurysm Anatomy Cerebral Arteries Middle Aged Models Theoretical medicine.disease Magnetic Resonance Imaging Facial nerve Pons Computer Science Applications Facial Nerve Posterior inferior cerebellar artery medicine.anatomical_structure Female Cerebellar artery business Algorithms Magnetic Resonance Angiography Software Hemifacial spasm |
| Zdroj: | Computers in Biology and Medicine. 66:263-268 |
| ISSN: | 0010-4825 |
| DOI: | 10.1016/j.compbiomed.2015.09.016 |
| Popis: | Cranial nerve palsy caused by aneurysmal compression has not been fully evaluated. The main causes of symptoms are considered to be direct mechanical compression and aneurysm pulsations. Recent studies indicate that nerve dysfunction is mainly induced by pulsation rather than by direct compression, and successful cases of endovascular surgery have been reported. We describe a patient with an unruptured vertebral artery-posterior inferior cerebellar artery (VA-PICA) aneurysm compressing the facial nerve at the root exit zone (REZ). The patient presented with peripheral facial nerve palsy but not hemifacial spasm and was successfully treated by coil embolization. To investigate the mechanisms underlying peripheral facial nerve palsy, fluid structure interaction (FSI) analysis can approximate displacement and the magnitude of aneurysmal wall motion due to hemodynamic forces. In our case, maximum mesh displacement was observed at the aneurysmal wall attached to the facial nerve inside the pons rather than the REZ, which explains the clinical manifestation of facial nerve palsy in the absence of hemifacial spasm. This preliminary report demonstrates the utility of FSI analysis for investigating cranial nerve neuropathy. A rare case of aneurysm causing facial nerve palsy without hemifacial spasm.FSI analysis is useful for evaluating the motion of aneurysmal walls.The point of maximal mesh displacement contributes to the majority of nerve symptoms. |
| Databáze: | OpenAIRE |
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