Skull base CT: normative values for size and symmetry of the facial nerve canal, foramen ovale, pterygoid canal, and foramen rotundum

Sepahdari, Ali R.; Mong, S.

doi:10.1007/s00276-012-1001-4

Cited by 33 publications

(27 citation statements)

References 14 publications

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“…We started the project by first creating a CT image database of infrazygomatic needle insertion to FR in human skull specimen. The average diameter of the FR in adults is 3.0 ± 0.4 mm, smaller than the FO (4.6 ± 0.9 mm) [34]. Currently, there are few available fluoroscopy and/or CT images of infrazygomatic needle access of FR in human.…”

Section: Discussionmentioning

confidence: 92%

CT-Guided Percutaneous Infrazygomatic Radiofrequency Neurolysis Through Foramen Rotundum to Treat V2 Trigeminal Neuralgia

Huang¹,

Yao²,

Feng³

et al. 2014

Pain Med

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Section: Discussionmentioning

confidence: 92%

CT-Guided Percutaneous Infrazygomatic Radiofrequency Neurolysis Through Foramen Rotundum to Treat V2 Trigeminal Neuralgia

Huang¹,

Yao²,

Feng³

et al. 2014

Pain Med

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“…The superior part of the Dorsum sellae may be a separate bone or it may be joined to the petrous portion of the temporal bone.The foramen rotundum may be double or absent (0.64%) of 157 skulls.The usual diameter of the optic canal is 5.5mm but varies from 3.5 to 6.5mm,The foramen spinosum and ovale may be continuous (Sepahdari and mong, 2013). A very rare variation of foramen rotundum in which it opens into the orbit along with a branching canal connecting middle cranial fossa with orbit.…”

Section: Resultsmentioning

confidence: 99%

Morphometric Analysis of Accessory Bony Canal Near Foramen Rotundum

Prasath¹

2020

Biosci. Biotech. Res. Comm

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Foramen rotundum is a circular aperture present in the base of the skull in the sphenoid bone, it connects the middle cranial cavity and the pterygopalatine fossa. Sometimes there may be a variation in several skulls that leads to the formation of the bony canal near the Foramen rotundum.Anatomical awareness of such variation in the middle cranial cavity fossa are important.The main aim of this study is to observe the presence or absence of accessory bony canal around foramen rotundum.32 unsexed dry cranial cavity from the Department of Anatomy,Saveetha Dental College was observed for the presence of accessory bony canal near foramen rotundum in the middle cranial cavity.The observed data was tabulated and analysed.14 accessory bony canal was observed near the Foramen rotundum in the total of 32 Skulls. Hence the occurrence was found to be 21.87%.In this study 9 accessory bony canals were observed on the left side with a percentage of 14.06% and the rest 5 was observed on the right side with a percentage of 7.81%. There is no incidence of bilateral accessory bony canal.Our study of the morphometric analysis of accessory bony canal near foramen rotundum may create an awareness for such variations in the middle cranial cavity and the orbital regions

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“…The average width of FC in adulthood ranges from 1.11 to 1.39 mm [ 24 ]. Comparing our results to the literature data, the average values for both portions of fetal FC were similar.…”

Section: Discussionmentioning

confidence: 99%

The morphology and morphometry of the fetal fallopian canal: a microtomographic study

2014

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BackgroundThe canal for facial nerve (the fallopian canal, FC) is a bony structure passing through the petrous part of the temporal bone. The anatomy of this demanding and important for oto- and neurosurgeons structure is well described in literature. Among several studies on radiological anatomy of this region, still little papers focus on the developmental measurements in prenatal period.AimAssessment of a microtomographic appearance of FC and dimensions based on available landmarks.MethodThe study was performed on 22 fetal temporal bones aged 16–27 Hbd. Specimens were scanned in micro-CT scanner. Length (FC1, FC2) and width (FC1W, FC2W) of the labyrinthine and tympanic portions of FC, angle of the first curve of FC (A1-2), length of the internal acoustic meatus (IAM), distance from FC to the basal cochlear turn (BCT) and to the lateral semicircular canal (LSC) were measured.ResultsThe paper discusses problems and a value of micro-CT in neuroanatomical studies. FC was found in 20/22 cases. Average value of all distances measured was: FC1 1.38 ± 0.35 mm; FC2 6.68 ± 1.34 mm; FC1W 1.07 ± 0.1 mm; FC2W 1.25 ± 0.13 mm; A1-2 87.24 ± 4.05°; IAM 4.89 ± 0.60 mm; BCT 0.35 ± 0.05 mm; LSC 0.55 ± 0.05 mm.ConclusionsLabyrinthine portion starts to ossify between 16th and 18th weeks of gestation and tympanic portion is fully ossified only after 20th week. Labyrinthine and tympanic portion of FC and the IAM elongate with age, whereas the angle of the first curve of FC and the distances to the BCT and the LSC remain stable and present no correlation with age.

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Skull base CT: normative values for size and symmetry of the facial nerve canal, foramen ovale, pterygoid canal, and foramen rotundum

Abstract: Relative asymmetry is more important than absolute size for determining nerve canal/foramen abnormality. These normative data may be useful adjuncts to subjective assessments of nerve canal/foramen size when using skull base CT to identify tumor.

Cited by 33 publications

References 14 publications

CT-Guided Percutaneous Infrazygomatic Radiofrequency Neurolysis Through Foramen Rotundum to Treat V2 Trigeminal Neuralgia

CT-Guided Percutaneous Infrazygomatic Radiofrequency Neurolysis Through Foramen Rotundum to Treat V2 Trigeminal Neuralgia

Morphometric Analysis of Accessory Bony Canal Near Foramen Rotundum

The morphology and morphometry of the fetal fallopian canal: a microtomographic study

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