The other two cavities of this system are the third and fourth ventricles, while the cerebral aqueduct of Sylvius. occipital regions in humans in their fMRI study. These cavities and their interconnecting channels, constitute the cerebral ventricular system. definition, amodal presence refers to the completion of part of an object. The transverse sinuses exhibit highly variable anatomy, which at times makes imaging evaluation of them, in those with possible dural venous sinus thrombosis, very difficult. The lateral ventricles are the largest in the series of four interconnecting fluid-filled cavities within the brain.
In turn, the sigmoid sinuses continue as the jugular bulbs in the skull base. They terminate in the sigmoid sinus just as it receives the superior petrosal sinus from the cavernous sinus. Emerging from between bones of the spine in the upper neck, the two greater occipital nerves make their way through muscles at the back of the head and into the. There is one nerve on each side of the head. In their anterolateral portion they receive the inferior anastomotic vein (of Labbé). What is occipital neuralgia Most feeling in the back and top of the head is transmitted to the brain by the two greater occipital nerves. On each side, the transverse sinus then runs in the lateral border of the tentorium cerebelli and grooves the occipital and squamous temporal bones. The paired left and right transverse sinuses, or lateral sinuses, are major dural venous sinuses and arise from the confluence of the superior sagittal, occipital and straight sinuses at the torcular herophili (confluence of sinuses).
