- StatPearls: Neuroanatomy, Cerebral Aqueduct (Sylvian) [BOOK]
- BOOKStatPearls Publishing: Treasure Island (FL)
- Galen initially described the ventricular system of the brain. As more information arose about the anatomy of the brain, anatomists described the cerebral aqueduct as a narrow communication duct betw…
Galen initially described the ventricular system of the brain. As more information arose about the anatomy of the brain, anatomists described the cerebral aqueduct as a narrow communication duct between the third and fourth ventricles. The word aqueduct comes from the Latin word “aqueductus" which translates to a canal used for taking water through a structure to another location. It is unclear when the eponym ‘aAqueduct of Sylvius’ first appeared; it is believed to be traced back to the well-known anatomist Franciscus Sylvius. The cerebral aqueduct (of Sylvius) plays an essential role in the ventricular system of the brain and when disrupted can have some significant clinical manifestations.
- Evaluation of CSF flow metrics in patients with communicating hydrocephalus and idiopathic intracranial hypertension. [Journal Article]
- RMRadiol Med 2019; 124(5):382-391
- CONCLUSIONS: In hydrocephalus, significant increase in ASV and peak velocities were noted. In IIH, CSF opening pressure was statistically significantly high in the presence of transverse sinus compression and standardized diastolic flow durations were statistically significantly short that are probably effects of increased impedance of CSF flow against increased intracranial pressure and unchanged or even decreased intraventricular CSF volume.
- The Predictor Role of the Aqueduct Cerebrospinal Fluid Flow on Endoscopic Third Ventriculostomy: Explication on Assumption Physical Model. [Journal Article]
- TNTurk Neurosurg 2018; 28(6):963-969
- CONCLUSIONS: The flow pattern in the aqueduct was normalised and velocity was increased compared with those of preoperative values after a successful ETV. The flow of CSF in the prepontine cistern is routinely used for ventriculostomy patency assessment. In addition, aqueduct measurements may be useful in predicting ventriculostomy patency. The physical model provides valuable insights on a possible mechanism that affected the experimental data.
- Linear relationship found by magnetic resonance imaging between cerebrospinal fluid volume and body weight in dogs. [Journal Article]
- AVActa Vet Hung 2017; 65(1):1-12
- Despite numerous studies on cerebrospinal fluid (CSF) and its importance during hydrocephalus or myelography, no reliable values exist about its overall volume in dogs. In this study, our aim was to …
Despite numerous studies on cerebrospinal fluid (CSF) and its importance during hydrocephalus or myelography, no reliable values exist about its overall volume in dogs. In this study, our aim was to measure the intracranial (IC) volume of CSF in dogs and assess its possible relationship with body size and the symmetry of the lateral ventricles. We ran a 3D magnetic resonance imaging (MRI) sequence on the central nervous system of 12 healthy, male mongrel dogs between 3-5 years of age and 7.5-35.0 kg body weight. A validated semiautomatic segmentation protocol was implemented to segment the CSF and measure its volume. Values for the volume of the ventricular compartment were between 0.97 and 2.94 ml, with 62.1 ± 11.7% in the lateral ventricles, 17.6 ± 4.9% in the third ventricle, 4.9 ± 1.6% in the aqueductus mesencephali and 15.5 ± 6.6% in the fourth ventricle. In 11 cases a significant asymmetry was found between the lateral ventricles. The results suggest that it may be normal for a dog to have one of the lateral ventricles 1.5 times larger than the other. The correlation between body weight and CSF volume was linear, indicating that the current dosage protocols for myelography, based on a hypothetical proportional relationship with body weight, may have to be revised.
- Magnetic Resonance Imaging of a Case of Central Neurocytoma. [Case Reports]
- AIActa Inform Med 2016; 24(6):419-421
- CONCLUSIONS: MRI is helpful in defining tumor extension, which is important in preoperative planning. Although IN is a relatively rare lesion, it should be considered in the differential diagnosis of intraventricular lesions in the presence of such typical MR findings. However, a definitive diagnosis requires immunochemical study and electron microscopy.
- Quantitative Evaluation of Normal Aqueductal Cerebrospinal Fluid Flow Using Phase-Contrast Cine MRI According to Age and Sex. [Journal Article]
- ARAnat Rec (Hoboken) 2017; 300(3):549-555
- The aim of this study was cerebrospinal fluid (CSF) flow quantification in the cerebral aqueduct using phase-contrast cine magnetic resonance ımaging (PCC-MRI) according to both sexes and three diffe…
The aim of this study was cerebrospinal fluid (CSF) flow quantification in the cerebral aqueduct using phase-contrast cine magnetic resonance ımaging (PCC-MRI) according to both sexes and three different age groups to obtain normative data. Seventy two volunteers with no cerebral pathology were included in this study. Subjects were divided into three age groups: 20-34 years, 35-49 years, and 50-65 years including equal gender groups. CSF flow's quantitatively evaluation was performed with images that were obtained by 1.5 T Magnetic Resonance (MR) unit from cerebral aqueduct level on the semi-axial plan. Between groups, peak velocity (cm sec-1 ), average velocity (cm/s), forward volume (mL), reverse volume (mL), net forward volume (mL), and average flow over range (ml/min) values of current flowing through aqueduct and average aqueductal areas were compared. There were no statistically significant differences in CSF flow parameters among different age groups and between sexes (P > 0.05). There was a statistically significant difference in average cerebral aqueduct area between the age group of 50-65 years and the other age groups (P = 0.002). The average aqueductal area was higher in the age group of 50-65 years. Normal aqueductal CSF flow parameters evaluated with PCC-MRI don't show a significant difference by age and sex. We have achieved the lower and upper values of these parameters would be useful in future clinical studies. The size of aqueductal area may also be explained by atrophy-dependent ventricular system dilatation in the elderly. Anat Rec, 300:549-555, 2017. © 2016 Wiley Periodicals, Inc.
- [Lateral ventricle diverticulum as a variant of hydrocephalus evolution]. [Case Reports]
- ZVZh Vopr Neirokhir Im N N Burdenko 2015; 79(1):75-82
- A clinical case of a 12 year-old girl with hydrocephalus complicated by rare condition, lateral ventricular diverticulum, is reported. Progression of the diverticulum was followed up according to MRI…
A clinical case of a 12 year-old girl with hydrocephalus complicated by rare condition, lateral ventricular diverticulum, is reported. Progression of the diverticulum was followed up according to MRI. The diverticulum of the lateral ventricular wall has emerged in the interval of 1 year (14 months have passed between the two MRI examinations) and spread towards the quadrigeminal cistern. In addition, compression of cerebellum, aqueductus cerebri Sylvii, and the fourth ventricle of the brain have emerged. A surgical treatment was suggested after the hydrocephalus had been initially revealed (when the diverticulum had not been formed yet); however, the child's parents refused the therapy. One year later, a series of epileptic seizures emerged, and MR scans showed a cystic neoplasm in the postcranial fossa above the cerebellum. The genesis of the cyst and its nature were unclear and additional invasive examination methods were required. MSCT ventriculography confirmed the diverticulum of the right lateral ventricle towards the quadrigeminal cistern.
- Relationship of age with the size of the interventricular foramina and aqueductus sylvii: a morphometric evaluation. [Journal Article]
- NRNeurol Res 2014; 36(10):878-81
- CONCLUSIONS: We did not observe any changes in interventricular foramina or cerebral aqueduct measurements in healthy subjects from a wide range of age groups. Such changes should be useful for diagnosing diseases that affect the ventricular system and planning surgical procedures, especially those involving the ventricular system.
- [Anesthetic management for a pediatric patient of Klippel-Trenaunay syndrome with giant head by hydrocephalus]. [Case Reports]
- MMasui 2012; 61(12):1356-8
- Klippel-Trenaunay syndrome (KTS) is a rare disorder associated with the triad of 1) capillary vascular malformation, 2) varicose veins and/or venous malformation, 3) and soft tissue and/or bony hyper…
Klippel-Trenaunay syndrome (KTS) is a rare disorder associated with the triad of 1) capillary vascular malformation, 2) varicose veins and/or venous malformation, 3) and soft tissue and/or bony hypertrophy. A six-month old, 6.0-kg-weight male pediatric patient was scheduled for ventriculo-peritoneal shunt operation for hydrocephalus caused by obstructive aqueductus cerebri. At the age of three months, he was diagnosed as KTS by extensive capillary vascular malformation and soft tissue hypertrophy of the right leg. Physical examination showed prominent vascular malformation over his anterior thoracic and abdominal wall, and soft tissue hypertrophy was only on his right leg. Simultaneously, he was complicated with congenital hydrocephalus because of obstructive aqueductus cerebri. His head and skull were enlarged and his head measurement reached 55 cm (chest measurement 32 cm). Anesthetic management of KTS patients should be prepared with blood transfusion against massive hemorrhage and hypovolemic shock. Furthermore, KTS patients should be always considered to have airway difficulty due to the soft tissue hypertrophy, upper and airway hemangiomas. Therefore, we planned safer tracheal intubation following practice guidelines for management of the difficult airway.
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- Membranous structures affecting the success of endoscopic third ventriculostomy in adult aqueductus sylvii stenosis. [Journal Article]
- MIMinim Invasive Neurosurg 2011; 54(2):68-74
- CONCLUSIONS: 3D sequences with MPR may help to observe not only the LM but also other membranes located through the prepontine cistern, which may be the reason of failed ETV.