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The confluence of sinuses is found deep to the internal occipital protuberance of the occipital bone of the skull. [1] This puts it inferior to the occipital lobes of the brain, and posterosuperior to the cerebellum. [1] It connects the ends of the superior sagittal sinus, the straight sinus, and the occipital sinus. [1]
Lateral ventricles and horns The lateral ventricles connected to the third ventricle by the interventricular foramina. Each lateral ventricle takes the form of an elongated curve, with an additional anterior-facing continuation emerging inferiorly from a point near the posterior end of the curve; the junction is known as the trigone of the lateral ventricle.
Each transverse sinus passes lateral and forward, describing a slight curve with its convexity upward, to the base of the petrous portion of the temporal bone, and lies, in this part of its course, in the attached margin of the tentorium cerebelli; it then leaves the tentorium and curves downward and medialward (an area sometimes referred to as ...
Brodmann areas 41 and 42 are parts of the primary auditory cortex.. Brodmann area 41 is also known as the anterior transverse temporal area 41 (H). It is a cytoarchitectonic division of the cerebral cortex occupying the anterior transverse temporal gyrus (H) in the bank of the lateral sulcus on the dorsal surface of the temporal lobe.
The calcar avis, (calcarine spur) previously known as the hippocampus minor, [1] is an involution of the wall of the lateral ventricle's posterior cornu produced by the calcarine fissure. [2] It is sometimes visible on ultrasonogram [3] and can resemble a clot. [4]
It forms a c-shaped bulge on the floor of the temporal horn of the lateral ventricle. [1] There is no consensus concerning which brain regions are encompassed by the term, with some authors defining it as the dentate gyrus , the hippocampus proper and the subiculum ; [ 2 ] and others including also the presubiculum , parasubiculum , and ...
BA41(red) and BA42(green) are auditory cortex. BA22(yellow) is Brodmann area 22, HF(blue) is hippocampal formation and pSTG is posterior part of superior temporal gyrus. The auditory cortex is the part of the temporal lobe that processes auditory information in humans and many other vertebrates.
It passes posterior-ward along its entire course. It is accommodated within a groove which runs across the inner surface of the frontal bone , the adjacent margins of the two parietal lobes , and the superior division of the cruciate eminence of the occipital lobe .