Importance of Individual Variation of Anterior Commissure-Posterior Commissure-Derived Subthalamic Nucleus Coordinates in Deep Brain Stimulation Targeting

Davies, Keith G.; Daniluk, Slawomir

doi:10.1159/000138771

Stereotact Funct Neurosurg

2008

DOI: 10.1159/000138771

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Importance of Individual Variation of Anterior Commissure-Posterior Commissure-Derived Subthalamic Nucleus Coordinates in Deep Brain Stimulation Targeting

Keith G. Davies¹,

Slawomir Daniluk²

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Cited by 2 publications

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“…The importance of anterior and posterior commissure and individual variations and tractographic anatomical study of the insular region have been reported in the literature (1,18), but there is no tractographic study related to the posterior commissure. We used DTI for identification of the fibers of the posterior commissure in the human brain, but the patient number was limited and a distinct tract could not be shown in all the patients.…”

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The anatomy of the posterior commissure

Özdemir¹

2015

Turkish Neurosurgery

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AIm: The connections of posterior commissure are defined. Its fibers mediate the consensual light reflex by interconnecting the pretectal nuclei. The fiber connections from the thalamic, pretectal, superior colliculus and the habenular nuclei are known, but they have not been shown anatomically. The present study is a fiber dissection study to define the anatomy of the posterior commissure. mAterIAl and methOds: Twenty formalin-fixed sheep heads were used in the study. The specimens were fixed in 10% formalin solution for 3 weeks. The arachnoidal and vascular structures were removed by using a surgical microscope magnification (x6-x40) and brains were again fixed for 4 weeks at -20°C. The fiber dissections were performed at Marmara University, Rhoton Laboratory. Also, a radiological tractographic study was carried on five healthy volunteers to see the posterior commissure cortical connections. results:In fifteen sheep brains, the dimensions of the posterior commissure were measured as 1.36 mm (range 0.5-2.5 mm) width, and as 4.6 mm (range 3-6 mm) length. In the dissection study, a frontotemporooccipital fascicle was observed to connect with the fibers of the posterior commissure. Diffusion tensor imaging scans showed the frontotemporooccipital tract to extend to posterior commissural region.COnClusIOn: To our knowledge, this is the first anatomical and tractographic study regarding the posterior commissure. However, further human cadaveric studies are necessary. BulGulAr: On beş koyun beyninde posterior komissür'ün ortalama kalınlığı 1,36 mm (0,5-2,5 mm), uzunluğu 4,6 mm (3-6 mm) olarak bulundu. Posterior komissür'ün her iki tarafta superior ve inferior kolikulusları bağladığı; habenula, pretektal, tektal ve periakuaduktal bölgeden kısa liflerle bağlantı kurduğu görüldü. Bazı spesimenlerde hipokampal komissür liflerinin splenial bölgede bu liflere eşlik ettiği izlendi. Talamik diseksiyondan sonra gözlenen frontotemporooksipital fasikülün posterior komissür'e uzandığı saptandı. sOnuÇ: Çalışmada diseksiyonla posterior komissür'ün frontotemporooksipitopontin bağlantısı gösterilmiştir. Araştırma posterior komissür'ün lif bağlantılarını ortaya koyacak insan kadavra çalışmalarıyla desteklenmelidir.

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confidence: 99%

The anatomy of the posterior commissure

Özdemir¹

2015

Turkish Neurosurgery

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Subthalamic Nucleus Targeting Using Interpeduncular Cistern as an Internal Landmark

Deogaonkar

Freitas

Machado

et al. 2011

Operative Neurosurgery

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Importance of Individual Variation of Anterior Commissure-Posterior Commissure-Derived Subthalamic Nucleus Coordinates in Deep Brain Stimulation Targeting

Cited by 2 publications

References 5 publications

The anatomy of the posterior commissure

The anatomy of the posterior commissure

Subthalamic Nucleus Targeting Using Interpeduncular Cistern as an Internal Landmark

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