Journals / Journal of Neurological Sciences (Turkish) / 2014 / Cilt: 31 - Sayı: 1

Posterior İnferior Serebellar Arter' in Orijinindeki Varyasyonların Önemi: Anatomik Çalışma

Importance of The Variations in The Origin of The PICA: Anatomical Study

Pages
155–163
Publication Date
2022-10-19
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

The PICA left the brain stem by passingbetween the rootlets of the vagus nerve in the 34% of hemispheres, in the 29.8% between therootlets of the accessory nerve, in the 25.5 % between the vagus and accessory nerves, in the4.25% coursed rostral to the glossopharyngeal nerve, in the 2.2% between glossofaringeal andvagus nerves.Conclusions: We believe that this study is a significant research in its own field and it givesimportant messages in terms of knowing the anatomic variations of the PICA at origin inorder to minimize surgical morbidity and mortality in the approach to the brain stem andcerebellum pathologies.

📌 3 Key Takeaways

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Objective & Hypothesis:Aim: Because the posterior inferior cerebellar artery (PICA) origin shows a very frequentanatomic variation, it is one of the vessels that has higher iatrogenic trauma exposurepotential during surgical exposure.
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Key Findings & Data:In this study, the aim is to investigate the variations in theorigin of the PICA and stress the importance of these in terms of microsurgery.Method: This study was carried on 26 (52 hemispheres) adult cerebellum cadavers that werefixed with formalin.
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Conclusion & Impact:The PICA left the brain stem by passingbetween the rootlets of the vagus nerve in the 34% of hemispheres, in the 29.8% between therootlets of the accessory nerve, in the 25.5 % between the vagus and accessory nerves, in the4.25% coursed rostral to the glossopharyngeal nerve, in the 2.2% between glossofaringeal andvagus nerves.Conclusions: We believe that this study is a significant research in its own field and it givesimportant messages in terms of knowing the anatomic variations of the PICA at origin inorder to minimize surgical morbidity and mortality in the approach to the brain stem andcerebellum pathologies.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

Aim: Because the posterior inferior cerebellar artery (PICA) origin shows a very frequentanatomic variation, it is one of the vessels that has higher iatrogenic trauma exposurepotential during surgical exposure. In this study, the aim is to investigate the variations in theorigin of the PICA and stress the importance of these in terms of microsurgery.Method: This study was carried on 26 (52 hemispheres) adult cerebellum cadavers that werefixed with formalin. Red coloured latex was injected to the vertebral artery (VA ) and thePICA. The diameters of each the PICA at the origin point, the origin surface from the VA,relationship to the lower cranial nerves and other anatomic variations were investigated.Findings: PICA originated from the VA in the 46 of 47 hemispheres, in one of them itoriginated from BA. In five hemispheres, the PICA was absent (10.6%). In two hemispheres,the PICA (4.25%) originated from the VA's extradural segment. We found that the PICAswere wider on the left side (mean:1.50±0.42 mm on the right side, and mean:1.63±0.34 mmon the left). In eight samples ( 30.7% ) the right PICA, in twelve samples (46.3%) the leftPICA was dominant. In altı samples ( 23%) both the PICAs were in equal diameter. Theorigin surface of the PICA from the VA was mostly posterior (36.1 %) and then lateral(31.9%) medial (23.4%) and anterior (8.4 %). The PICA left the brain stem by passingbetween the rootlets of the vagus nerve in the 34% of hemispheres, in the 29.8% between therootlets of the accessory nerve, in the 25.5 % between the vagus and accessory nerves, in the4.25% coursed rostral to the glossopharyngeal nerve, in the 2.2% between glossofaringeal andvagus nerves.Conclusions: We believe that this study is a significant research in its own field and it givesimportant messages in terms of knowing the anatomic variations of the PICA at origin inorder to minimize surgical morbidity and mortality in the approach to the brain stem andcerebellum pathologies.

Özet

Amaç: Posterior inferior serebellar arter'in (PİSA) orijini çok sık anatomik varyasyongöstermesi nedeniyle cerrahi yaklaşım sırasında iyatrojenik travmaya maruz kalma olasılığıfazla olan damarlardan biridir. Bu çalışmada amaç PİSA' nın orijinindeki varyasyonlarıincelemek ve bunların mikrocerrahi girişimler açısından önemini vurgulamaktır.Yöntem: Bu çalışma 26 adet (52 hemisfer) formalin ile fiske edilmiş erişkin serebellumkadavrası üzerinde yapıldı. Vertebral arter (VA) ve PİSA'lara kırmızı renkli lateks injekteedildi. Her bir PİSA'nın origin noktasında kalınlıkları ve VA'den origin yüzeyi, alt kranialsinirlerle olan ilişkileri ve diğer anatomik varyasyonları incelendi.Bulgular: PİSA 47 hemisferin 46'sında VA'den, birinde BA'den origin aldı. Beş hemisferdePİSA agenetik idi (%10.6). İki hemisferde (%4.25) PİSA, VA'in ekstradural segmentindenorijin aldı. PİSA solda daha kalın bulundu. (sağda ortalama, 1.50±0.42 mm ve solda ortalama1.63±0.34 mm). PİSA örneklerin %30.7'sinde sağda, %46.1'inde solda dominant, %23'ündeeşit bulundu. PİSA'nın VA'den orijin yüzeyi çoğunlukla posterior (%36.1) daha sonra lateral(%31.9), medial (%23.4) ve anterior (%8.4) idi. PİSA hemisferlerin %36.1'inde vagussinirinin rootletleri arasından, %31.9'unda aksessori sinirinin rootletleri arasından, %25.5'indevagus ve aksessori sinirlerinin arasından, %4.25'inde glossofaringeal sinirin rostralinden ve%2.2'sinde glossofaringeal ve vagus sinirinin arasından geçerek beyin sapını terketti.Sonuçlar: Beyin sapı ve serebellum patolojilerine yaklaşımda cerrahi morbidite vemortalitenin minimize edilmesi için PİSA'nın orijinindeki anatomik varyasyonlarınınbilinmesi anlamında bu makale önemli mesajlar vermekte ve kendi konusunda önemli birçalışma olduğu inancındayız.

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Cite This Article

KAYACI, S., ÖZVEREN, M. F., ÇAĞLAR, Y. Ş., KOTİL, K. (2022). Posterior İnferior Serebellar Arter' in Orijinindeki Varyasyonların Önemi: Anatomik Çalışma. Journal of Neurological Sciences (Turkish), Cilt: 31 - Sayı: 1, 155–163. https://ajindex.com/articles/565708

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