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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.
The hippocampal formation is a compound structure in the medial temporal lobe of the brain. It forms a c-shaped bulge on the floor of the inferior horn of the lateral ventricle. [1] Typically, the hippocampal formation is said to included the dentate gyrus, the hippocampus, and the subiculum. [2]
The horn's prominence is accentuated by a depression behind the protrusion. The rear portion of the skull of Tameryraptor is represented by the parietals , frontals , part of the supraoccipital , and partial otoccipitals (bones relating to the ear).
Colpocephaly is characterized by disproportionately large occipital horns of the lateral ventricles (also frontal and temporal ventricles in some cases). MRI and CT scans of patients demonstrate abnormally thick gray matter with thin poorly myelinated white matter. This happens as a result of partial or complete absence of the corpus callosum.
The hippocampus can be seen as a ridge of gray matter tissue, elevating from the floor of each lateral ventricle in the region of the inferior horn. [19]: 49 [20] This ridge can also be seen as an inward fold of the archicortex into the medial temporal lobe. [21]
Stapes, temporal styloid process, hyoid bone (lesser horns and upper part of body), stylohyoid ligament, [16] Reichert's cartilage: Facial nerve (VII) Ascending pharyngeal artery, Inferior tympanic artery, primitive hyoid artery, Stapedial artery: 3rd: Stylopharyngeus: Hyoid bone (greater horns and lower part of body), thymus: Glossopharyngeal ...
There is no choroid plexus in the anterior horn. In the third ventricle, there is a small amount in the roof that is continuous with that in the body, via the interventricular foramina, the channels that connect the lateral ventricles with the third ventricle. A choroid plexus is in part of the roof of the fourth ventricle.
The temporal bones are overlaid by the sides of the head known as the temples where four of the cranial bones fuse. Each temple is covered by a temporal muscle. The temporal bones house the structures of the ears. The lower seven cranial nerves and the major vessels to and from the brain traverse the temporal bone.