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Ventriculomegaly is a brain condition that mainly occurs in the fetus when the lateral ventricles become dilated. The most common definition uses a width of the atrium of the lateral ventricle of greater than 10 mm. [1] This occurs in around 1% of pregnancies. [2]
In neuroanatomy, the ventricular system is a set of four interconnected cavities known as cerebral ventricles in the brain. [1] [2] Within each ventricle is a region of choroid plexus which produces the circulating cerebrospinal fluid (CSF). The ventricular system is continuous with the central canal of the spinal cord from the fourth ventricle ...
It is a common measure of ventricular dilation or cerebral atrophy in patients with traumatic brain injury or hydrocephalus ex vacuo. [3] VBR also tends to increase with age. [1] Generally, a higher VBR means a worse prognosis for recovering from a brain injury. [3]
The volume of the lateral ventricles is enlarged in some neurological diseases, such as schizophrenia, [8] bipolar disorder, [9] major depressive disorder, [9] and Alzheimer's disease. [10] Ventriculomegaly is a brain condition that mainly occurs during development when the lateral ventricles become dilated. [11]
Fourth ventricle location shown in red (E), pons (B); the floor of the ventricle is to the right, the roof to the left. The fourth ventricle has a roof at its upper (posterior) surface and a floor at its lower (anterior) surface, and side walls formed by the cerebellar peduncles (nerve bundles joining the structure on the posterior side of the ventricle to the structures on the anterior side).
Premature ventricular contraction (PVC). When the bottom chambers of your heart beat too early. ... Dilated cardiomyopathy. Dilated cardiomyopathy is when the muscle walls of your heart become ...
Acute dilatation of the ventricular system is more likely to manifest with the nonspecific signs and symptoms of increased intracranial pressure (ICP). By contrast, chronic dilatation (especially in the elderly population) may have a more insidious onset presenting, for instance, with Hakim's triad (Adams' triad). [8]
[14] [15] It was suggested that the enlargement of ventricles occurred as a result of white matter development arrest during early fetal life. [4] They stated that "in the apparent dilatation of the occipital horns...it represented a failure of development of the cerebral wall with persistence of the embryonal vesicular character of the brain."